Airless dispensing pump with tamper evidence features.

(54) Title: AIRLESS SUPPLY PUMP WITH EVIDENCE OF HANDLING EVIDENCE. (54) Title: AIRLESS DISPENSING PUMP WITH TAMPER EVIDENCE FEATURES.

(57) Summary

The present invention relates to a pump assembly or assembly characterized in that it comprises: an airless dispensing pump that includes a telescopically movable pump head for pumping a fluid and a nozzle orifice from which the fluid is pumped; and a tamper evidence band comprising a band wrapped around the pump head, the tamper evidence band 'further comprises a nozzle plug received in the nozzle orifice, characterized in that the band is initially positioned to prevent movement of the pump head telescopically and the band comprises a breakable portion configured to break the band wrapped around the pump head when the user pulls o n the nozzle plug to allow removal of the pump from the pump head to allow movement of the pump head.

(57) Abstract

An airless dispenser pump assembly ineludes a pump mechanism with an inlet valve that is configured to efficiently pump viscous fluids and that is able lo pre-primed when the pump mechanism is attached to a container. In one form, the inlet valve ineludes a seal member that seáis an inlet port of the pump and an outer support member that secures the inlet valve to the rest of the pump mechanism. Two or more legs generally extend in a circumferential direction between the support member and the seal member in order to create a large flow opening for fluid flow through the inlet valve when opened and to rapidly cióse the inlet valve. The pump mechanism further ineludes an outlet valve that is configured to draw fluid back from a nozzle of the pump after dispensing in order to minimize build up around the nozzle.

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SCRSRRSA SJÍ a »« MÍA i, · - · - M

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Institute

Mexican Property

Industrial S3

PATENT TITLE NO. 338569

Owner (s): RIEKE CORPORATION

Address: 500 West Seventh Street, Auburn, Indiana, 46706, USA

Name: AIRLESS SUPPLY PUMP WITH EVIDENCE ELEMENTS OF

IMPROPER HANDLING.

Classification:

lnt.CI.8: B05B11 / 00

Inventors): 8RIAN R. LAW; JEFFREY WILLIAM SPENCER: ROBERT D. ROHR; DAVID J.

PRITCKETT

REQUEST

Presentation date: MX / a / 2009/005032 August 15, 2006

Divisional Patent Number: 266682

Hour:

16:26

Country:

US

PRIORITY

Date:

August 2005

Number:

11 / 204,848 {Validity: Twenty years'^i:faith

Expiration Date: August 15, 2026

The reference patent is granted based on articles 1 · 2 · taoeion V 6 ° fraction III, and 5β of the Industrial Property Law.

Pursuant to article 23 of the Industrial Property Law, this patent has a validity of twenty non-extendable years, counted from the date the application is filed and this will take the hit out of the “ariMpera to keep the js rights in force.

Whoever subscribes to the present title stipulates it based on the provisions of articles 6 sections III and 7 bis 2 of the Law of the fWeCbMKMMEMl Official Federation (DOF) 09/27) 1991, "form" * 1 9809/1994 »2 & L9Í1996, 96/12/1997. 05/17/1999. 01/26/2004, 06/16/2005, 01/25/2006, 06/05/2009, 06/01/2010, 06/18/2010, 06/28/2010, 01/27/2012 and 09 / 04/2012); Articles 1, 3, fraction V, subsection a), 4, and 12, sections I and III of the Regulations of the Mexican Institute of Industrial Property (DOF 12/14/1999, amended on 07/01/2002, 07/15/2004, 07/28/2004 and 09/07/2007); Articles 1, 3, 4, 5, section V, subsection), 16 sections I and III and 30 of the Organic Statute of the Mexican Institute of Industrial Property (DOF 12/27/1999, amended on 10/10/2002, 07/29/2004, 08/04/2004 and 09/13/2007); 1st, 3rd and 5th Subsection a) of the Agreement that delegates powers to the Deputy Directors General, Coordinator, Divisional Directors, Holders of the General Bipglonates, Divisional Deputy Directors, Coordinators and other subordinates of the Mexican Institute of Property "~ .F. 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007).

<img file="MX338569B_D0001.tif" />

Issue Date: April 21, 2016

THE DIVISIONAL DIRECTOR OF PATENTS

<img file="MX338569B_D0002.tif" />

N AH ANN AND CANAL REYES

Arenai No. 550. Floor 1,

Coi. Puebio Santa María Tepepan, Xochimiíco, CP 16020,

Mexico City

Tea!. (65) 53 34 07 00 www.impi qop mx

<img file="MX338569B_D0003.tif" />

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AIRLESS SUPPLY PUMP WITH ELEMENTS OF ΕνΤ ^ Τ ^^^ Ε ^

INDUSTRIAL S2 £ 5S * 'je £^:

IMPROPER HANDLING

BACKGROUND OF THE INVENTION

<td></td><td colspan="2">The present invention</td><td>is concerning in general</td><td>with</td>

<td>bombs</td><td>dispensers</td><td>without air</td><td>and more specific, but</td><td>not</td>

<td colspan="2">exclusively is</td><td>concerning</td><td>with a dispensing pump</td><td>without</td>

<td>air with</td><td>elements</td><td>of evidence &lt;</td><td>tampering.</td><td></td>

Airless pumps have been developed for a wide range of applications including distribution or assortment of personal care products such as skin creams, skin lotions, toothpaste, and hair gels , also as food sauces and the like. Many such products deteriorate rapidly when placed in contact with air, and thus it is important to prevent air from entering the package when the product is dispensed. In typical distribution pump applications, air is allowed to enter the container via a ventilation path in order to equalize the pressure inside the package as the product is dispensed. If this were not the case, the container would progressively crush or in the case of rigid containers, the increased vacuum in the container would exceed the capacity of the dispensing pump to extract the product from the container.

With conventional dispensing pumps that have

I Ai PI

MEXICAN INSTITUTE -3 'a

INSTITUTO MEXICANO DE LA FSOPJECAD industrial suction tube or pipe, the capacity of evSCUdi — trido — et · container content is relatively poor for viscous products. Usually, the viscous product, such as a cream, is drawn through the suction tube, which works well initially, but the viscous product is not self-leveling. As a result, a cavity or hole is formed in the surface of the product to a point where the distributor pump supplies only air because the product that remains adhered to the side walls of the container is not capable of dispensing. As a result, it is common for only about 50% to 60% of the total viscous product package content to be dispensed with conventional dispenser pumps.

In airless type dispensing systems, there are two common ways to overcome the problems mentioned above, either when using a folding bag type design or using a follower piston type design. With the collapsible design, a collapsible bag or sack is attached to the dispenser pump, which progressively folds as the contents are removed. In the follower piston design, a rigid container, usually cylindrical or oval in shape, has a follower piston that progressively reduces the volume of the container as product is withdrawn by the dispensing pump.

Whether in one or the other type of dispensing system without

<img file="MX338569B_D0004.tif" />

IMPI

MEXICAN INSTITUTE

OF THE PROPERTY

INDUSTRIAL air, initial priming of the pumping mechanism can — e «-e — hd both difficult due to the slimy nature of the content. Even when properly primed, the pump mechanism may not supply a sufficient amount of fluid due to restrictions within the pumping mechanism, especially the valves. With viscous products, the valves within the pump mechanism need to provide relatively large flow ports, but at the same time, close quickly to ensure that the product is pumped efficiently. Due to differences in viscosities of various products, it is difficult to easily and inexpensively reconfigure the pumping mechanism to accommodate products with different properties. It is also desirable that a variety of products, such as pharmaceuticals, do not come into contact with metal, which can tend to contaminate the pharmaceutical product and therefore, there is a need to minimize or even eliminate contact with the metal component within the pumping. In typical airless pump designs, after dispensing, the product may remain at the outlet of the dispensing head where the product may dry or harden due to contact with air. The dry product usually creates an unpleasant appearance and can sometimes lead to plugging of the outlet. During packaging, container leaks are always a concern. With pharmaceuticals, foodstuffs, hygiene products

IMPI

MEXICAN INSTITUTE aR

OF THE PROPERTY

INDUSTRIAL .1 »'personnel as well as other products where product safety is a concern, a clearly identifiable element of tamper evidence for the container and pump mechanism is required.

Thus, there is a need for improvements in this field.

BRIEF DESCRIPTION OF THE INVENTION

One aspect of the present invention is concerned with an airless dispensing pump assembly. The assembly includes a pump mechanism that defines a pump cavity with an outlet port through which the viscous fluid from a container is supplied. The pump mechanism includes a piston slidably received in the pump cavity to pump fluid from the pump cavity. An outlet valve element is configured to allow viscous fluid to flow out of the pump cavity during a piston supply stroke and to form a vacuum in the pump cavity during an inlet or inlet stroke of the piston. An inlet valve element covers the inlet port and the inlet valve element includes an external support element and an internal seal element that is sized to seal the inlet port during the piston dispensing stroke. Two or more connecting legs connect the outer support member to the inner seal member to quickly close the inlet port during

<img file="MX338569B_D0005.tif" />

piston assortment stroke. At least one of the connecting legs includes a circumferential portion that extends in a circumferential direction around the seal element to provide a large flow opening for the viscous fluid between the legs during the piston intake stroke.

Another aspect is concerning with a pump spout valve that includes a valve port and a valve element. The valve element includes an external support element arranged around the valve port and an internal seal element that is dimensioned to seal the valve port. Two or more connecting legs connect the outer support member to the inner seal member. At least one of the connecting legs includes a portion that extends peripherally around the inner seal element.

A further aspect is concerning a dispensing pump assembly that includes a pump mechanism that defines a pump cavity. The pump mechanism includes an inlet valve element to control the flow of fluid into the pump cavity and a piston slidably received in the pump cavity to pump fluid from the pump cavity. The piston defines a flow passage through which the fluid in the pump cavity is pumped. A pump head has a dispensing outlet fluidly coupled to the passage of

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0006.tif" />

flow to supply fluid. An Hp- ”alunia Re outlet element is received in the piston flow passage to control the flow of fluid out of the pump cavity. The flow passage includes a first portion dimensioned to create a piston-like fit between the first portion and the outlet valve element to draw fluid back from the dispensing outlet after the fluid is dispensed. The second portion is sized larger than the first portion to allow fluid to flow around the outlet valve element during dispensing of the fluid.

Still another aspect is concerned with a technique for pre-priming a pump. The pump includes an inlet valve element that seals a pump inlet port. The inlet valve element includes an external support element, an internal seal element that seals the inlet port, and at least two connecting legs that connect the external support element to the internal seal element. A container is filled with fluid through an upper hole in the container. The pump is primed by securing the pump to the upper port of the container in such a way that the pressure of the fluid inside the container opens the inlet valve element to at least partially fill the pump cavity with the fluid.

An additional aspect is concerning with a dispensing pump assembly. The set includes a container that

ΙΜΡΪ

Mexican Institute of Industrial Property

<img file="MX338569B_D0007.tif" />

includes a skirt flange with a split7Türa ~ Tte — fgrldéη-τ — A pump with a skirt is received in the skirt slot. The skirt includes a break tab which is configured to form a grip opening once the break tab is removed allowing removal of the pump from the container.

Another aspect is concerned with a pump assembly that includes an airless dispensing pump. The pump includes a pump head that is telescopically movable to pump a fluid and a nozzle orifice from which the fluid is pumped. A tamper evidence band is wrapped around the pump head to prevent movement of the pump head in a telescopic manner. The tamper evident band has a nozzle plug received in the nozzle hole and the tamper evident band has a breakable portion configured to break the band after the user pulls on the nozzle plug to allow movement of the bomb.

Additional forms, objects, elements, aspects, benefits, advantages and embodiments of the present invention will become apparent from a detailed description and figures provided herein.

<img file="MX338569B_D0008.tif" />

BRIEF DESCRIPTION OF THE FIGÜKBS - Figure 1 is a cross-sectional view of a fluid dispensing assembly in accordance with an embodiment of the present invention.

Figure 2 is a cross sectional view of the assembly of Figure 1 during an assortment run.

Figure 3 is a front view of a pump body used in the assembly of Figure 1.

Figure 4 is a front cross-sectional view of the pump pump body of Figure 3.

Figure 5 is a top view of an inlet valve for the assembly of Figure 1.

Figure 6 is a side cross-sectional view of the inlet valve of Figure 5.

Figure 7 is a cross sectional view of a pump cylinder for the assembly of Figure 1.

Figure 8 is a front view of a piston in the assembly of Figure 1.

Figure 9 is a front cross-sectional view of the piston of Figure 8.

Figure 10 is a bottom view of a plug in the assembly of Figure 1.

Figure 11 is a side cross-sectional view of the plug of Figure 10.

Figure 12 is a front view of an assembly of

<img file="MX338569B_D0009.tif" />

IMPI

MEXICAN INSTITUTE

OF THE PROPERTY

INDUSTRIAL airless jet pump according to another modality.-

<td></td><td>The</td><td>Figure</td><td> 13</td><td>is</td><td>a</td><td>view</td><td>in</td><td>section</td><td>cross</td>

<td>side</td><td>of the</td><td>joint</td><td>of</td><td colspan="2">bomb of</td><td colspan="2">the figure</td><td> 12.</td><td></td>

<td></td><td>The</td><td>Figure</td><td> 14</td><td>is</td><td>a</td><td>view</td><td>in</td><td>section</td><td>cross</td>

<td>side</td><td colspan="3">from a container</td><td colspan="2">i for him</td><td colspan="2">set</td><td>pump</td><td>of the figure</td>

<td> 12.</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td>

<td></td><td>The</td><td>Figure</td><td> 15</td><td>is</td><td>a</td><td>view</td><td>in</td><td>section</td><td>cross</td>

<td colspan="2">enlarged from</td><td colspan="2">container</td><td>of</td><td colspan="2">Figure 14</td><td> •</td><td></td><td></td>

<td></td><td>The</td><td>Figure</td><td> 16</td><td>is</td><td>a</td><td>view</td><td>in</td><td>section</td><td>cross</td>

<td>side</td><td colspan="2">single piston</td><td colspan="4">follower for him</td><td colspan="2">set of</td><td>pump</td>

<td>Figure</td><td> 12.</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td>

<td></td><td>The</td><td>Figure</td><td> 17</td><td>is</td><td>a</td><td>view</td><td>in</td><td>section</td><td>cross</td>

<td>side</td><td colspan="3">of a gualdera</td><td>of</td><td>bomb</td><td>for</td><td>the</td><td>set</td><td>pump</td>

Figure 12.

Figure 18 is a perspective view of a pump body for the pump assembly of Figure 12.

Figure 19 is a side view of the pump body of Figure 18.

<td></td><td>The</td><td>Figure</td><td> 20</td><td>is</td><td>a</td><td>view</td><td>in cross section</td>

<td>side</td><td>of the</td><td>body of</td><td colspan="2">bomb</td><td>of the</td><td colspan="2">Figure 18.</td>

<td></td><td>The</td><td>Figure</td><td> 21</td><td>is</td><td>a</td><td>view</td><td>enlarged body of</td>

<td>bomb of</td><td>the</td><td>Figure 18</td><td> •</td><td></td><td></td><td></td><td></td>

<td></td><td>The</td><td>Figure</td><td> 22</td><td>is</td><td>a</td><td>view</td><td>in perspective of a</td>

<td>cover</td><td>of</td><td colspan="2">dock for</td><td>the</td><td colspan="2">set of</td><td>pump in Figure 12.</td>

Figure 23 is a top view of the cover of

MEXICAN INSTITUTE industrial dock of Figure 22.

<td>The</td><td>Figure 24</td><td>is</td><td colspan="2">a sight</td><td>in</td><td>section</td><td>cross</td><td>of</td>

<td>the cover</td><td>spring</td><td>of</td><td>the</td><td>Figure</td><td> 22</td><td colspan="2">how is it taken</td><td>to the</td>

<td>along the</td><td>line 24-24</td><td>in</td><td>the</td><td>Figure</td><td> 23.</td><td></td><td></td><td></td>

<td>The</td><td>Figure 25</td><td>is</td><td colspan="2">a sight</td><td>in</td><td>section</td><td>cross</td><td>of</td>

<td>the cover</td><td colspan="2">spring</td><td>the</td><td>Figure</td><td colspan="2">22 just like</td><td>is taken to</td><td>the</td>

<td>along the</td><td>line 25-25</td><td>of</td><td>the</td><td>Figure</td><td> 23.</td><td></td><td></td><td></td>

Figure 26 is an enlarged bottom view of a pump head for the pump assembly of Figure 12.

Figure 27 is a side cross sectional view of the pump head of Figure 26.

Figure 28 is a side cross sectional view of a piston for the pump assembly of Figure 12.

Figure 29 is a side cross sectional view of a pump cylinder for the pump assembly of Figure 12.

Figure 30 is a bottom of a nozzle cap for the pump assembly of Figure 12.

Figure 31 is a side cross-sectional view of a pump assembly incorporating a tamper evidence band in accordance with a further embodiment.

Figure 32 is an enlarged cross-sectional view of the pump assembly of Figure 31.

Figure 33 is a bottom view of the • to! Band.

'i-jS'

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0010.tif" />

Evidence of tampering from Figure 31.

Figure 34 is a partial perspective view of a pump assembly according to another embodiment with a wrap under the tamper evidence cap in an unlocked position.

Figure 35 is a partial perspective view of the pump assembly of Figure 34 with the casing under the tamper evidence cap in the locked position.

Figure 36 is a partial perspective view of a pump assembly with anti-rotation tab according to still another embodiment.

Figure 37 is an enlarged cross-sectional view of the pump assembly of Figure 36.

Figure 38 is a partial perspective view of a pump assembly according to another embodiment with a first plug of a double plug nozzle cover inserted into a nozzle port.

Figure 39 is a partial perspective view of the pump assembly of Figure 38 with the first plug separated from the rest of the double plug nozzle cover.

FIG. 40 is a partial perspective view of the pump assembly of FIG. 38 with a second plug of the double plug nozzle cover inserted into the nozzle port.

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MEXICAN INSTITUTE OF IA INDUSTRIAL PROPERTY

<img file="MX338569B_D0011.tif" />

Figure 41 is a pn-ppnective view of a pump assembly with a nozzle cover sheet according to a further embodiment.

Figure 42 is a side view of a pump assembly with a tamper evidence cover in accordance with yet another embodiment.

DESCRIPTION OF SELECTED MODALITIES

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the figures and specific language will be used to describe them. However, it will be understood that no limitation of the scope of the invention is intended by this. Any further alterations and modifications in the disclosed embodiments and any further applications of the principles of the invention as described herein are contemplated as would ordinarily be presented to one skilled in the art with which the invention is concerned. An embodiment of the invention is shown in greater detail; although it will be evident to those experienced in the relevant art that some elements that are not relevant to the present invention may not be shown for clarity purposes.

An airless pump assembly 30 in accordance with one embodiment of the present invention, among others, is illustrated.

<img file="MX338569B_D0012.tif" />

in Figures 1 and 2. As shown, pump assembly 30 includes a container 32 for storing fluid, a follower piston 34 received in container 32, a pump 37 for pumping fluid from container 32, and a cap 39 covering the pump 37. Figures 1 and 2 show two elevations in cross section, one of which, Figure 1, shows the follower piston 34 at the bottom of container 32 with the pump 37 at the top of its stroke and the other, Figure 2, shows the follower piston 34 at the point where virtually the entire contents of container 32 has been filled with pump 37 at the bottom of its stroke. It should be noted that directional terms such as up, down, top, bottom, left and right will only be used for the convenience of the reader in order to aid the reader's understanding of the illustrated modalities and that the use of these terms Directional in no way limits the illustrated elements to a specific orientation. The pump assembly 30 will be described with reference to a follower piston type system, but it should be noted that the selected elements of the assembly 30 may be adapted for use with other types of pumping systems, such as with a dispenser pump without bag-type gear folding.

Referring to Figure 1, the follower piston 34 is slidably received within a cavity 43 in container 32 and the follower piston 34 has seal elements

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0013.tif" />

top and bottom 44 that seal against container 32. A vertical ring or support 46 at base 47 of container 32 prevents follower piston 34 from being pushed too far into base 47 of container 32 during packaging, thereby minimizing the risk for damage to the lower piston seal element 44. As fluid is dispensed from container 32, a slight vacuum is formed and consequently follower piston 34 slides upward from cavity 43 to reduce the effective size of cavity 43. In the base 47, the container 32 has one or more ventilation slots 49 as well as another hole (not shown) that ventilates the container 32 in order to prevent a vacuum from forming between the underside of the follower piston 34 and the base. 47 of container 43 as follower piston 34 progressively moves upward during dispensing. The base 47 of container 32 further has a drive dog 52, which allows the exterior of container 32 to be printed. In the illustrated embodiment, the container 32 as well as other components are generally cylindrical in shape, but it should be appreciated that these components may be formed differently in other embodiments.

In pump assembly 30, pump 37 is secured to container 32 by means of a press fit connection. However, it should be appreciated that pump 37 can be secured to container 32 in other ways. How I know

IMPI

Mexican Institute of Industrial Property

<img file="MX338569B_D0014.tif" />

shown in Figures 1 and 2, the 37 in ^ Trrw-- ι · pump_π pump 55 which is secured to container 32 and inlet valve element 57 that controls fluid flow to pump 37, a pump cylinder 60 in which a pump piston is slidably positioned, an outlet valve element 64, a pump head 66 for dispensing the fluid, a return spring 67 and a nozzle plug 58. Looking at Figures 3 and 4, the pump body 55 has one or more ribs 72 which are inserted into corresponding slits in the container 32. The pump body 55 further has a lid slit 74 to which the lid 39 is secured and a retaining flange 55 positioned between the shoulders 72 and the lid slit 74. At one end, pump body 55 defines an inlet gate 77 through which fluid is received from container 32, as illustrated in Figure 4. Around the inlet gate 77, the pump body 55 has a seal shoulder or seat 80 which is driven against and sealed by the inlet valve element 57 and surrounds the

<td>projection</td><td>of</td><td>seal 80,</td><td>the</td><td>Body</td><td>pump</td><td> 55</td><td>has</td><td>also</td><td>a</td>

<td>projection</td><td>of</td><td>retention</td><td>of</td><td colspan="2">valve 82 which</td><td>I know</td><td colspan="2">aligns with</td><td>the</td>

<td>element</td><td>of</td><td>valve</td><td colspan="2">entry 57</td><td>on</td><td colspan="2">gate</td><td colspan="2">input</td>

77.

Inlet valve element 57 has a unique design that provides a variety of benefits when dispensing viscous creams or other viscous fluids. How can

IMPI

See Figures 5 and 6, the element of váTunln dn rH-it-xaria 57 has a generally flat disk shape, but as it should be understood, the inlet valve element 57 can have a globally different in other modalities. Inlet valve element 57 includes an external peripheral ring or support element 85 and an internal seal element 87 which is connected to the · external support element 85 through two or more connecting legs 88. The external support element 85 in the embodiment shown is in the form of a continuous ring, but it is contemplated that the outer support member 85 may have a different overall shape. For example, the external support element 85 in other embodiments may include discontinuous segments. In the illustrated embodiment, inlet valve element 57 has three legs, but in other embodiments, valve 57 may have two or even more than three legs. Each leg 88 includes an outer portion 90 that generally extends radially inward from the inner support member 85 and an inner portion 91 that extends radially outwardly from the seal member 87. Between the outer 90 and inner 91 portions, each leg 88 has a circumferential portion 92 that extends between the support member and seal member 87 in a circumferential direction, such that leg 88 generally extends around the periphery of seal element 87. As shown, legs 88 are surrounded on both sides by flow openings 94. In

MEXICAN INSTITUTE OF PROPERTY

INDUSTRIAL

<img file="MX338569B_D0015.tif" />

In the illustrated embodiment, the outer portions 90 w-in-'rp ^ ra Ql of each leg 88 are displaced radially approximately equidistant from each other, which in this case is approximately one hundred twenty degrees (120 degrees), such that the legs 88 are generally in the form of equal arc segments. In another embodiment, where two legs 88 are used instead of three, the legs 88 form almost one hundred eighty degree (180 degree) arc segments, thereby allowing the legs 88 to be further lengthened for a given size of the valve element. entry 57. The length and shape of the legs 88 ensures that the internal seal element can be lifted from the seat 80 and to allow the creation of a series of large holes through the openings 94, allowing easy flow of viscous fluid to the pump 37. By extending legs 88 circumferentially or peripherally, legs 88 can be longer than if they only extend radially and with legs 88 being longer, larger flow holes can be formed. Not only is the design of the inlet valve 57 allowing large openings to be created for the easy flow of viscous fluid; it is so importantly that it allows the inlet valve element 57 to close extremely quickly. With two or more legs 88 pulling around seal element 87, seal element 87 is capable of rapid sealing against seat 80. The speed with which seal element 87 is

Mexican Institute of Industrial Property

<img file="MX338569B_D0016.tif" />

closes on valve seat 80 can also be adjusted either by changing the width, thickness and / or number of legs 88 or by using a more or less rigid material. Consequently, the pumping action of pump 37 can be modified to accommodate fluids with different characteristics by simply replacing inlet valve element 57 with one having different properties. For example, it was found that using three equally sized legs 88 provides desirable flow hole sizes also as favorable closure characteristics.

In one embodiment, the inlet valve element 57 is made of plastic in order to prevent contamination of the product with metal. As stated above, it is desirable that pharmaceuticals do not come into contact with the metal in order to avoid contamination. In a particular way, inlet valve element 57 was found to work well when produced with a polyolefin material (from the polyethylene / polypropylene family) which can be relatively inexpensive. It is contemplated that inlet valve element 57 can be made of other materials, however. For example, inlet valve element 57 can also be made of more sophisticated polymers in applications that require application in heat or where chemical compatibility is a factor. Except for Pier 67 and possibly

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INDUSTRIAL

<img file="MX338569B_D0017.tif" />

Outlet valve element 64, all remaining components of assembly 30 can be produced with polyolefin materials, which tends to reduce manufacturing costs. However, it should be understood that the components of the assembly 30 in other embodiments may be made of different materials, such as metal, if so desired.

Looking again at Figures 1 and 2, when mounted to pump 37, inlet valve element 57 is sandwiched between pump body 55 and pump cylinder 60. Pump body 55 in Figure 4 has a connector 98 extending around the inlet gate 77 also as the valve retention shoulder 82. Inside, connector 98 has one or more insert grooves 99 that receive corresponding insert protrusions 101 on a body mating flange 103 extending from pump cylinder 60, which is illustrated in Figure 7. In a pump cylinder end 60, facing inlet valve element 57, a retaining shoulder 105 on pump cylinder 60 is clamped against support element 85 on inlet valve element 57. This ensures that the inlet valve element 57 cannot escape and is always kept in correct relation to the inlet gate 77 in the pump body 55. In order to ensure rapid priming, the seal element 87 is driven to the closed position by seat 80 around the

IMPIOS

INSTITUTE μγχ, 'γα C' u * í? - ''

INDUSTRIAL PROPERTY, inlet gate 77 of pump body 55, such that inlet valve element 57 becomes virtually air tight during initial priming of pump 37. The amount of pre-charge bias may be varied depending on the particular requirements. For example seat 80 in one mode extends approximately 0.3mm high around inlet gate 77.

Pump cylinder 60 defines a pump cavity or chamber 108 in which piston 61 is slidably received. Although pump cylinder 60 and cavity 108 in Figure 7 are generally cylindrical in shape, it is contemplated that they may have a different overall shape in other embodiments, such as a rectangular shape. A piston guide 110 with a guide hole 112 extends into the pump cavity 108 of the pump cylinder 60 and a guide flange 114 extends around the guide hole 112. Together, the piston guide 110 and the flange Guide 114 define a spring retention slit 115 in which spring 67 is received (FIG.

1) .

As shown in Figures 8 and 9, the piston 61 has a piston head 120 that is attached to a shaft or stem 122. The piston head 120 has upper and lower seal members 124 that extend at a slight angle to away from the piston head 120 in order to seal against the walls of the pump cavity 108. Both the head

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fNDUSJfÍlAL

IMPI

120 of the piston as the shaft 122 of the piston _ 61 define a flow passage 127 through which the fluid is pumped. At the end of shaft 122, opposite piston head 120, pump head 66 is press-fitted to shaft 122, as illustrated in Figures 1 and 2. However, it must be recognized that head 66 of pump can be coupled to shaft 122 in other ways. As illustrated, an outlet nozzle

129 with an outlet port 130 in pump head 67 it is fluidly coupled with flow passage 127 in shaft 122 such that fluid from container 32 can be dispensed to the user. It should be noted that the spring 67 is mounted on the outside of the shaft 122, between the pump head 66 and the pump cylinder 60 and as a consequence, the spring 67 does not contact the product that is supplied. As briefly stated, this may be particularly important for pharmaceuticals where it is vital that the pharmaceutical is not in contact with metal.

The pump 37 in the illustrated embodiment is configured to minimize the amount of fluid that remains in the outlet port 130 of the pump head 66, where the fluid can dry or harden due to contact with air. To remedy this problem, pump 37 incorporates a retrosuction element in which fluid in outlet port 130 is sucked back into pump 37. Referring to Figures 1 and 9, piston 61 has in passage

IMP

INSTITUTO MÍX.-.- YEAR OF THE INDUSTRIAL TROHeoaÓ

<img file="MX338569B_D0018.tif" />

flow 127 a valve seat on? with a conical surface 134, against which the outlet valve element 64 is sealed. Outlet valve element 64 acts as a check valve to allow fluid flow in only one direction. In the illustrated embodiment, the outlet valve element 64 has a generally spherical or ball shape, but it should be understood that the outlet valve element 64 may be differently shaped in other embodiments. For example, the outlet valve element 64 in other embodiments may have a cylindrical shape. In order to minimize metal contact within pump 37, outlet valve element 64 in one embodiment is manufactured from a non-metallic material. For example, the outlet valve element 64 in one embodiment is made of glass. However, a wide range of plastic materials can also be used in other embodiments. In systems where contact with metal is not a concern, it is contemplated that the outlet valve element 64 can be made of metal.

Downstream of valve seat 133, flow passage 127 has a first portion 136 that is only slightly larger than the diameter (size) of outlet valve element 64 to allow movement of outlet valve element 64, in so much so that it still prevents the passage of fluid around the outlet valve element 64. This

IMPI

<img file="MX338569B_D0019.tif" />

^{, NST,}MEXICAN TUTO / * - &lt;01, FROM NDUSTRIAL PROPERTY tight fit between outlet valve element 64 and first portion 136 of flow passage 127 creates a piston-like fit that is used to draw fluid back from the nozzle Outlet 129 during up stroke of piston 61. Close to the pump head 66, the flow passage 127 has a second portion 138 that is larger than the first portion 136, such that the second portion 138 is dimensioned large enough to allow fluid to flow around the element valve outlet 64 during down stroke of piston 61. In the second portion 138, the piston 61 has ribs 140 that center the outlet valve element 64 on the first portion 136, such that the outlet valve element 64 is capable of falling back to the first portion, as shown in Figure 2. Ribs 140 extend radially inward and along flow passage axis 127. Without the rib 140 or some other centering structure, the outlet valve element 64 could be moved aside which could cause its return to seat 133 to be delayed and in the worst case scenario, could cause air to be sucked back to pump cavity 108. At one end of flow passage 127, pump head 66 has a retaining element 143 that limits the travel of outlet valve element 64 between valve seat 133 and retaining element 143. In other embodiments, it is contemplated that the bomb

<img file="MX338569B_D0020.tif" />

it may further incorporate a spring or other type of drive device to drive the outlet valve element 64 against the valve seat 133. By incorporating this retrosuction element into the piston 61, the mounting of the piston mechanism is simplified.

Pump 37 in the illustrated mode is manually operated by depressing pump head 66, but it should be appreciated that pump 37 in other modes can be automatically actuated. Before use, both cap 39 and plug 68 are removed from pump 37. After pump head 66 is pushed down, spring 67 causes piston 61 as well as pump head 66 to return to a position extended. In this upward stroke or piston inlet stroke 61, the outlet valve element 64 travels from the second position 138 of the flow channel 127 (Figure 2) to the first portion 136 (Figure 1). Once the outlet valve element 64 reaches the first portion

136, the outlet valve element 64 slides tightly into the first portion 136 and acts as a virtual piston, drawing the fluid back from the outlet nozzle 129 into a position in the flow passage 127 above of the outlet valve element 64. By withdrawing the fluid from the nozzle 129, the likelihood of the fluid becoming embedded in the outlet port 130 is reduced. During the up stroke, the outlet valve element 64 is

IMPI

MEXICAN INSTITUTE OF THE ERO? ÍfPAI? INDUjTKIAL

<img file="MX338569B_D0021.tif" />

eventually seats in valve seat 133 to create a vacuum in pump cavity 108 as shown in

Figure 1. The vacuum formed in the pump cavity 108 causes the inlet valve element 57 to open, thereby providing a wide through path for the fluid from the container 31 to enter the pump cavity 108. In the stroke pump 37 upflow or dispensing stroke, inlet valve element 57 closes to prevent fluid in pump cavity 108 from being pushed back into container 32. Outlet valve 64 is lifted from valve seat 133 to allow fluid to be dispensed via nozzle 129 in the head. Specifically, as the outlet valve element 64 travels in the first portion 136, the fluid is unable to pass around the outlet valve element 64, but once the outlet valve element 64 reaches the second largest portion 138 of flow passage 127, fluid is capable of passing around outlet valve 57 and out of nozzle 129. Additional fluid can be supplied by depressing and releasing the pump head 66 in the manner described above.

To ensure that the outlet 130 of the nozzle 129 remains clean during the initial shipment, the nozzle plug 68 is capped to the nozzle 129 to ensure that there is no fluid leakage. When looking at Figures 10 and 11, plug 68 includes a handle or tab 147 that is used for 'NSTIJ UTO MEXICANO

EU LA PROHCfj INDU5TR

XICAN0

PIEDAD V '»-' ''&gt;

JSTRiAL pulls plug 68 from nozzle 129 and a plug portion 148 that is plugged into outlet port 130 of nozzle 129. Plug portion 184 incorporates a fine vent channel 150 that is dimensioned small enough to prevent fluid leakage medium to high viscosity, but allows air to escape during initial priming of pump 37. To also help minimize leakage during packing, pump 37 is covered by cover 39. Cap 39 ensures that pump head 66 cannot be inadvertently depressed during transit as well as keeps assortment pump 37 in a primed and clean condition for display purposes. Lid 39 also allows the full package to support high overhead loads, which can result when quantities of packages are stacked on top of each other.

Before filling container 32, follower piston 34 is pre-mounted to container 32 and driven to the bottom position, as shown in Figure 1. As mentioned above, bracket 46 in container 32 prevents the Follower piston 34 is pushed too far into base 47 of container 32. The design of the pump assembly 30 lends itself to top fill in that the container 32 is normally passed through a fill line and is top filled with the fluid or product that is initially dispensed on top of the follower piston 34. In one form, an immersion nozzle that is used to

MEXICAN INSTITUTE Ü

OE LA WIOPIEDao

INDUSTRIAL \ b «rMr

IMPI fill container 32, sink from the cavity 43 to the bottom of container 32 immediately above follower piston 34 and progressively retract as fluid is dispensed. This technique ensures minimal air entrapment, which can be detrimental to the performance of assembly 30. Once the proper fill level has been obtained, the assortment pump 37, along with plug 68 and cap 39, is adjusted pressure on top of container 32. In the process of inserting the assortment pump 37 into the container 32, the fluid in the container 32 drives the inlet valve element 57 to open and partially primes the pump cavity 108. The very fine vent channel 150 in the plug 68 ensures that trapped air, which becomes pressurized as pump 37 is inserted into place, is allowed to escape to ensure that there is no resistance to opening of inlet valve element 57 for priming purposes. Ventilation air through vent channel 150 further reduces the risk of product spillage in the press fit between container 32 and pump body 55. By pre-priming pump 37 in such a way as to ensure that even with the most viscous fluid, a minimum number of priming strokes are required in order for the 37 pump to begin operation.

A pump assembly 170 in accordance with another embodiment of the present invention is illustrated in the Figures.

MExÍcaÑo INSTITUTE [ΊΠ. IlDOU.fr. . _ Tf * í, fc&gt; V,^Vr\.'’‘4

.. riuAlUAP;

OF THE l'ltOPI? Γ) 'industrial and 13. As it should be recognized, the joint? —170 — of pump. Figure 12 shares a number of elements in common with the pump assembly 30 in Figure 1. For the sake of quality as well as brevity, these common elements will not be discussed again in greater detail below, but reference is made to prior discussion of these common elements. As before, the pump assembly 170 includes a container 172, a follower piston 175 slidably disposed in the container 172, and a pump 177 that encloses a container hole 178 of the container 172, as illustrated in Figure 13. Opposite to opening 178 of the container, the container 172 has a vent hole 179 (Figure 14) that vents air to (or out of) the container 172 as the piston 175 slides into the container 172. Around the container hole 178, the container 172 has one or more pump coupling slits 181 in which the pump 177 is secured in a press fit manner. It should be appreciated that pump 177 as well as other components of pump assembly 170 can be otherwise secured, in addition to an insert fit connection.

On the outside of container 172, near container 178 hole ^, container 172 in Figure 5 has a skirt coupling flange 183 defining a skirt slot 185 in which a pump skirt 188 (Figure 13)

<img file="MX338569B_D0022.tif" />

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

177 is received. Referring again to ,. Figures 12 and 13, with the skirt 188 of the pump 177 inserted into the skirt slot 185 in the container 172, it is difficult for anyone to gain access to the contents of the container 172 without noticeably damaging the pump assembly 170. Pump assembly 170 employs tamper evidence device 190 that allows a person to open container 172 to refill container 172, for example, but at the same time alerts the user when container 172 has been opened for the first time. As shown, tamper evidence device 190 includes a breakaway or tamper evidence tab 192 with one or more frangible connections 194 connecting break tab or breakaway tab 192 to skirt 188. Break tab 192 is capable of breaking from skirt 198 to open a gripping opening 197 allowing the user to grasp skirt 188 and pry skirt 188 from skirt slot 185 in container 172. After leveraging the skirt 138 of skirt slit 185, the user is able to pull the pump 167 from the container in such a way that the user can fill the contents of the container 172, if desired. Subsequently, the user can reattach the pump 177 to the container to the container 162, such that the pump assembly 170 can be used again. With the break tab 192 removed, other users are informed that the set of

<img file="MX338569B_D0023.tif" />

MEXICAN INSTITUTE OF THE INDUSTRIAL PMOPíFV

<img file="MX338569B_D0024.tif" />

polished, pump 170 was previously opened

In embodiment i, the gripping hole 197 has a semi-circular shape such that a finger, thumb or other body part can be used to leverage the skirt 188 of the container 172. As should be appreciated, the gripping hole 197 it can be formed differently in other modalities, such that skirt 188 can be held via a tool, such as a screwdriver or other object.

As mentioned above, the follower piston 175 is slidably disposed in container 172 in order to generally equalize the pressure when pump 177 pumps the contents of container 172. As can be seen in Figure 16, follower piston 175 shares a variety of elements in common with the follower piston 32 illustrated in Figure 1, such as the upper and lower seal elements 44. However, the follower piston 175 of Figure 16 has a contact surface 201 of the pump that is raised to be generally level with the seal member 44 that is located closer to the pump 177, as illustrated in Figure 13. Both with the bottom of the pump 177 and the contact surface 201 with the follower piston pump 175 being flat, the pump 177 and the follower piston 175 can be brought into contact with each other in a level manner, so that all the contents of the container can be assorted.

With continued reference to Figure 13, pump 177

<img file="MX338569B_D0025.tif" />

IMPI

INSTITUTO MEXICO DE LA TRONADRIAL INDUSTRIAL includes a pump gualdera 203 that is coupled to a pump body or cover 205 and a pump head 208 that is capable of moving telescopically in relation to gualdera 203. Inside, pump 177 it further includes inlet valve element 57 of Figure 5, which is sandwiched between pump body 205 and pump cylinder 211 in a manner similar to that illustrated in the embodiment of Figure 1. A pump piston 214 with the outlet valve element 64 is slidably arranged in the pump cylinder 211. As illustrated in Figure 13, spring 67 to drive the pump head 208 in an extended position is arranged between cylinders 211 pump head and a spring cover 216 which is coupled to the pump head 208. A nozzle cap 221 is coupled to pump head 208 in order to minimize fluid leakage during packaging.

In pump 177, head 203 protects the components of pump 177 from undesirable tampering. Returning to Figure 17, the head 203 defines a pump head hole 223 through which the pump head 208 extends and retracts during pumping. The head 203 includes a female clamping groove 225 which secures the head 203 to a male clamping flange 227 on the pump body 205 (Figures 18 and 20). Again, it should be appreciated that the head 203 and the pump body 205 can be coupled together in other ways. For example, around the

<img file="MX338569B_D0026.tif" />

IMPI

MEXICAN INSTITUTE

PE IA PROPERTY

INDUSTRIAL pump head port 223 in one embodiment, the header 203 may include a coupling flange with the pump body that rests against the pump body 205.

Looking at Figures 18, 19, 20 and 21, the body

205 The pump case includes skirt 188 with break tab 192 which provides an element of tamper evidence. As can be seen in Figure 20, the pump body 205 includes a container engagement wall 229 with one or more container engagement protrusions 231 that secure the pump body 205 with the slits 181 in the container 172 ( Figure 15). Together, skirt 188 and wall 229 form a container slot 233 in which the rim of container 172 is received. A follower piston face wall 235 extends radially inward of the container wall 229. In the illustrated embodiment, the front wall 235 of the follower piston is generally flat, in such a way that the contact surface 201 of the follower piston pump 175 is apt to rest level against the pump body 205, thus allowing the evacuation almost completes the contents of the container 172. Like the previous embodiments, the pump body 205 defines the inlet gate 77 through which the contents of the container 172 is supplied. The seal or seat shoulder 80, which is driven against and seals against the inlet valve element 57, surrounds the inlet port

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

77. The pump body 205 also has a 238 connector that was instituted mm Ί / Ί

PROPERTY V'fc -. * '® ·' 4 '' 1 industrial extends around inlet gate 77 and connector 238 has one or more insertion slots 99 to secure pump cylinder 211 to pump body 205 .

To minimize leakage during packaging or in other situations, the pump 177 incorporates a fixing element in which the pump 177 is capable of blocking or maintaining the pump head 208 at the top of its stroke, that is, in a position up or extended. At the end of connector 238, pump body 205 has one or more locking notches 242, one or more corresponding guide grooves 244, and one or more retaining portions 246. In the illustrated embodiment, connector 238 has two guide grooves 244 that are oriented one hundred and eighty degrees (180 degrees) apart, but it should be recognized that grooves 244 may be oriented differently. As can be seen in Figures 22, 23, 24 and 25, the spring cover 216 includes one or more guide tabs 248 that are configured to extend through and move within the clamping grooves 242 and guide grooves 244 of the pump body 205. In the illustrated embodiment, the guide tabs 248 extend outward from the spring cover 216, but in other embodiments, the guide tabs 248 can extend in other directions, such as in an inward direction.

Referring again to Figures 19 and 21, the

<img file="MX338569B_D0027.tif" />

Pump body 205 in clamping notches 242 have one or more clamping protrusions or retainers 249 that hold the guide tabs 248 of the spring cover 216 against the retainers 246 during packaging. As should be appreciated, guide tabs 248 can be held in place in other ways. When at the fixing notches 242, the guide tabs 248 on the cover 216 are prevented from moving in an assortment stroke direction, in other words, the down stroke direction. After packaging, the user can rotate the pump head 208 with sufficient force to separate the guide tabs 248 from the clamping retainers 249. Once the guide tabs 248 of the cover 216 are positioned over the guide grooves 244 in the pump body 205, the pump 177 can operate normally and allow fluid to be dispensed by depressing the pump head 208. If so desired, pump 177 can be relocked by rotating pump head 208 such that guide tabs 248 on cover 216 separate from guide grooves 244.

In the embodiment illustrated in Figures 24 and 25, the spring cover 216 is hollow and at one end, the spring cover 216 has one or more limit tabs 252 that extend radially inward to engage with the pump cylinder 211 to limit the travel of pump head 208. Opposite end with limit tabs 252,

IMPI

MEXICAN INSTITUTE of Industrial Property deck 216 has a portion 235 of Ampla-me sntn with the pump head that is configured to mate with the pump head 208. In the illustrated embodiment, the head engaging portion 255 has one or more notch relief notches 257 and one or more support relief notches 258

<td>than</td><td>receive respectively</td><td>a</td><td colspan="3">or more curved peak portions</td>

<td> 260</td><td>and one or more supports</td><td> 261</td><td>over the head</td><td>208 of</td><td>bomb</td>

<td colspan="2">(Figure 26).</td><td></td><td></td><td></td><td></td>

<td></td><td>As can be seen</td><td>in</td><td>Figures 26 and</td><td>27, the</td><td>head</td>

208 The pump nozzle includes an outlet nozzle 263 with the outlet port 130 communicating fluidly with a piston connector 265. The piston connector 265 is configured to engage with the piston 214 of the pump. Inside, the piston connector 265 has the retaining element 143 that limits the travel of the outlet valve element 64 and centering ribs 266 around the retaining element 143 to center the valve element 64. An outer sleeve 268 surrounds the piston connector 265, and at one end, the outer sleeve 268 has one or more guide notches 269 that receive the guide tabs 248 on the spring cover 216, such that the head 208 of the pump and spring cover 216 rotate in unison. The piston connector 265 in Figure 27 has one or more piston engagement ribs 270 which engage with one or more grooves 2 61 on the pump piston 214 in a press fit manner, as

<img file="MX338569B_D0028.tif" />

ΙΜΡΪ

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY illustrated in Figure 28. __________

As it should be recognized, the pump piston 214 in the

Figure 28 shares a variety of elements in common with piston 61 which is illustrated in Figure 9. For example, the pump piston 214 of Figure 28 includes piston head 120, shaft 122, seal elements 124, flow passage 127 and valve seat 133 with conical surface 134 of the types described above with reference to Figure 9. The spring 67 is mounted on the outside of the shaft 122 and as a consequence, the spring 67 does not contact the product that is supplied. As before, the outlet valve element 64 acts as a check valve to allow the flow of fluid only in one direction by sealing against the valve seat 133. The pump piston 214 further incorporates the retrosuction element of the Figure 9. Flow passage 127 has a first portion 136 that is only slightly larger than the diameter (size) of outlet valve element 64 to allow movement of outlet valve element 64, while still preventing fluid passage around the outlet valve element 64. This tight fit between valve member 64 and first portion 136 of flow passage 127 creates a piston-like fit that is used to draw fluid back during upward stroke of piston 214. Flow passage 127 further has a second

<img file="MX338569B_D0029.tif" />

portion 138 which is larger than first portion 136 such that second portion 138 is dimensioned large enough to allow fluid to flow around outlet valve element 64 during downward stroke of piston 61. In the second portion 138, piston 61 has ribs 140 that center outlet valve element 64 on first portion 136. In one form, the piston head 120 for the pump piston 214 of Figure 28 has one or more retaining elements 27 3 that limit the travel of the piston 214.

Referring again to Figure 13, the pump piston 214 is slidably disposed in the pump cylinder 211. Referring to Figure 29, the pump cylinder 211 has one or more insert protrusions 101 on a body-engaging flange 103 that extend from the pump cylinder 211 to mate with the insert grooves 99 in the connector 238 of the pump body 205 (Figure

twenty). At the end facing the inlet valve element

57, the pump cylinder 211 has a retaining shoulder 275 that is clamped against the support element 85 on the inlet valve element 57 to maintain the inlet valve element 52 on the inlet gate 77 in the body 205 of bomb. Pump cylinder 211 defines a pump cavity or chamber 278 in which piston 214 is slidably received. Piston guide 208 with the

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0030.tif" />

guide hole 112 extends into the pump cavity

<td> 108</td><td>of the</td><td>cylinder</td><td>bomb</td><td>211 and</td><td>the</td><td>flange</td><td> 114</td><td>as guide</td><td>I know</td>

<td colspan="2">extends</td><td>around the</td><td colspan="2">hole</td><td>guide</td><td> 112.</td><td colspan="2">Jointly,</td><td>the</td>

<td>guide</td><td> 280</td><td>piston</td><td>and the</td><td>flange</td><td> 114</td><td>of</td><td>guide</td><td>define</td><td>a</td>

spring retention slit 281 in which spring 67 is received (Figure 13). Unlike the embodiment of Figure 7, the retaining flange 280 on the pump cylinder 211 of the

Figure 29 does not project the pump cylinder 211 in order to minimize the profile of the pump cylinder 211. As illustrated, pump cylinder 211 further includes a cover retention flange 283 that is configured to engage with limit tabs 252 on spring cover 216 (Figure 24) during upward travel to retain cover 216.

Unlike the embodiment of Figure 1, the nozzle plug 221 for the embodiment of Figure 12 does not incorporate the ventilation slot channel 150. Rather, as shown in Figure 30, the nozzle plug 221 has a Seal element 285 that completely seals outlet port 130 of pump head 208 to minimize leakage. Before dispensing the container contents 172, the nozzle cap 221 is removed and if so desired, the nozzle cap 221 can be reinserted into pump 208 after use.

As previously mentioned, during packaging and / or before use, the pump head 208 is oriented in a

<img file="MX338569B_D0031.tif" />

locked position, where the head 208 ⁿor ⁰³ from being pressed down to stock the product. Fixing pump 208 reduces the likelihood of fluid leakage during packaging, as well as in other situations. When the pump head 208 is in the locked position, the guide tabs 346 are separated from the guide grooves 244 in the pump body 205 and the retainers 249 in the pump body 205 retain the guide tabs. 248 in the fixing notches 242 and against the seals 246 (Figure 20). As noted above, the guide tab notches 269 on the pump head 208 (Figure 27) engage the guide tabs 248 on the spring cover 216 (Figure 25) such that the spring cover 216 rotates when the pump head 208 is rotated. Before using the pump assembly 170, the user rotates the pump head 208 such that the guide tabs 24 8 separate from the retainers 24 9 and the guide tabs 248 are rotated over the guide grooves 248 , thereby unlocking pump 177.

Once the pump head 208 is rotated to an unlocked position, the pump 177 in Figure 13 generally operates in the same manner as that described with reference to Figure 1. The pump 17 7 in the illustrated mode is set to operation manually by depressing pump head 208, but it should be appreciated that pump 177 in other modes can be

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY act automatically. After the 2-U8 -— pump head, ..... &amp; a.

pushed down, spring 67 causes piston 214 as well as pump head 208 to return to an extended position. In this up stroke or intake stroke of piston 214, outlet valve element 64 travels from second portion 138 of flow channel 127 to first portion 136, as illustrated in Figure 28. Once the outlet valve element 64 reaches the first portion 136, the outlet valve element 64 slides tightly into the first portion 136 and acts as a virtual piston, which draws fluid from the outlet nozzle 263 inward to a position in the flow passage 127 above the outlet valve element 64. By removing the fluid from the nozzle 263, the likelihood of the fluid becoming embedded in the outlet port 130 is reduced. During the up stroke, the outlet valve element 64 inevitably settles in the valve seat 133 to create a vacuum in the pump cavity. The vacuum formed in the pump cavity causes the inlet valve element 57 to open, thereby providing a wide through path for fluid from container 32 to enter the pump cavity. On the downward stroke or pump stroke of pump 177, inlet valve element 57 closes to prevent fluid in the pump cavity from being propelled back into container 32. Outlet valve 64 is lifted

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0032.tif" />

valve seat 133 to allow fluid to be dispensed via the nozzle 263 of the head. Specifically, as the outlet valve element 64 travels in the first portion 136, the fluid is unable to pass around the outlet valve element 64, but once the outlet valve element 64 reaches the second larger portion 138 of flow passage 127, fluid is capable of passing around outlet valve 57 and out of nozzle 263. The additional fluid can be supplied by repeatedly pressing and releasing the pump head 208 in the manner described above. After use, the user can rotate the pump head 208 such that the pump 177 is again locked, if desired.

A pump assembly 290 that includes a tamper evidence element according to another embodiment is illustrated in Figures 31 and 32. The tamper evidence element of Figure 31 can be used as an alternative or in addition to other types of elements of evidence of tampering. As shown, pump assembly 290 includes an airless dispenser pump 292 with the same components as pump assembly 170 illustrated in Figure 13, except for a few modifications to its follower piston 293 and pump head 294. In particular, as shown in Figure 31, the follower piston 293 includes a support flange 295 which rests

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338569B_D0033.tif" />

against the closed end of container 172 when the container is full. Referring to Figure 32, the pump head 294 has an external sleeve 296 with a relief notch 295 that receives a tamper evident ring (TER) or band 300. Among its many functions, the evidence ring for Tamper 300 locks the pump head 224 in the extended or up stroke position. As can be seen, the tamper evident ring 300 is wrapped around the outer sleeve 296 of the pump head 294 in the relief notch

297. One side of the tamper evident ring 300 rests against a mating edge 302 of the notch 297. The other side of the tamper evident ring 300 rests against the bore 203 of the pump. The tamper evident ring 300 includes an attachment band or loop 307 that is wrapped around the pump line 294 and a nozzle plug 309 that is coupled to the attachment band 307 such that the nozzle plug 309 it is apt to be torn from the attachment band 309. The nozzle plug 309 includes a seal portion 311 that is equipped to the outlet 130 of the pump head 294 in order to reduce leakage.

Figures 31 and 32 illustrate the configuration of tamper evident ring 300 prior to initial use of pump 2 92, such as during packaging and

IMPI '^NSTneither-',^r?,^MD^{EX, CAN}&lt;&gt; PROPERTY w&gt; l / strial initial storage. With the attachment band__307 disposed between the coupling edge 302 of the pump head 294 and the pump head 203, the pump 292 is prevented from being driven. Before pump 292 is used, nozzle plug 309 is torn from attachment band 307, which in turn breaks band 307, thereby preventing actuation of pump 292. With the mouthpiece cap 309 torn from the band, the mouthpiece cap 309 can be used to recap the outlet port 130.

Referring to Figure 33, the attachment band 307 has one or more breakable portions 314 near the nozzle plug 309 that are narrower than the rest of the attachment band 307. In the embodiment shown, two portions which are can break 314 are placed on opposite sides of the nozzle plug 309 which break the band after the plug 309 is removed. During assembly, the ends 317 of the attachment band 307 are secured together. The ends 317 have handles 319 that engage with each other in an interlocking manner. The 319 internal radial hands use a locking lug-like connection to secure the ends together. Once the ends 317 are inserted together, the ends 317 cannot be easily broken. It is contemplated that in other embodiments, the ends 317 can be connected in other ways. In the illustrated embodiment, the attachment band 307 has a general shape

MEXICAN INSTITUTE OF PROPERTY

INDUSTRIAL circular, but it should be understood that the attachment band 307 can be formed differently depending on the shape of the pump head 294.

Figures 34 and 35 illustrate a pump assembly 324 including a pump head 326 having an envelope under tamper evidence cap 328 in accordance with another embodiment. The tamper evidence cap 328 is generally Z-shaped with a barbed locking insert 330 which is inserted into a locking notch 332 in the pump head 326. In the illustrated embodiment, the tamper evidence cap 328 is pivotally coupled to a flange 327 of the pump head 326 via an active link, but in other embodiments, the tamper evidence cap 328 may be attached to the head. 326 to pump in other ways. A clamping notch 332 is placed near the pump gutter 203 and once the barbed clamping insert 330 is pivoted to engage the clamping notch 332, the tamper evident cap 328 forms a strut between the flange 327 of the pump head 326 and the pump head 203, thereby preventing the pump head 326 from being depressed.

The tamper evidence cap 328 has a pull tab 334 that is held by the user in order to top the plug 328 prior to use. To separate the

IMPI

INSTITUTO MiXiCANO ¿A

OF PROPERTY /.i?

industrial

JNrn.J3TRML _ tamper evidence plug 328, user pulls pull tab 334 such that the active hinge or joint between plug 328 and pump head 326 breaks and spike clamp insert 330 is pulling on the locking notch 332. Once the tamper evidence cap 328 is removed, the pump head 326 can be actuated to fill the contents of the container 172.

Referring to Figures 36 and 37, the pump assembly 340 according to another embodiment includes a tamper evidence element that includes an anti-rotation tab 343 that prevents rotation of the pump head 345. The pump mechanism 347 of Figure 36 operates similarly to that illustrated in Figure 13, in that, to operate pump 347, pump head 345 needs to be rotated to an unlocked position. During assembly, the tab 343 is inserted into an anti-rotation slot 348 in the pump head 345, in the direction as indicated by the direction arrow 349 in Figure 36. Inside the pump head 345, the spring cover 216 has a slot

350 for tab receiving anti-rotation tab 343. As can be seen in Figure 37, pump cylinder 211 has a connector 353 that is configured to secure the end of anti-rotation tab 343 to pump cylinder 211. Connector 353 includes a 355 pull tab that

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PRORIETY

<img file="MX338569B_D0034.tif" />

is bendable and a locking tab with spikes 356 that mates with a spiked end 358 of anti-rotation tab 343. During insertion, the spiked end 358 of anti-rotation tab 343 slides along The barbed locking tab 356 in connector 353 and the driving tab 355 depresses and retains the barbed end 358 of anti-rotation tab 343 in engagement with the barbed locking tab 356. The anti-rotation tab 343 further has a bending portion 359 that drives the barbed end 358 in engagement with connector 353, which in turn reduces the likelihood of separation. Near connector 353, anti-rotation tab 343 has a groove 360 ​​that forms opposite breakout portions 363. It should be recognized that other embodiments may include one or more breakout portions 363 that show and / or include other types of frangible structures. Before use, the user pulls on a bent gripping portion 365 of the anti-rotation tab 343 such that the break portions 363 are broken in order to allow separation of the anti-rotation tab 343. With the portions of rupture 363 broken, anti-rotation tab 343 cannot be reattached to pump head 345 and consequently provides evidence that someone tampered with pump assembly 340. Once the anti-rotation tab 345 is removed, the pump head 345 can be rotated to the position that allows pumping.

<img file="MX338569B_D0035.tif" />

A pump assembly 370 that incorporates a tamper evidence element in accordance with a further embodiment will be described with reference to Figures 38, 39 and 40. In the illustrated embodiment, a double plug nozzle cover 342 is inserted into a 37 4 nozzle of a 37 5 pump head, after the pump functionality has been tested. As shown, the nozzle cover 372 includes two plugs, a first plug 376 and a second plug 377, which extend from a pull tab 378 of the cover 372 in an opposite manner. In other embodiments, plugs 376, 377 may have other orientations. The first plug 376 has a series of teeth 379 that mate with corresponding teeth 381 inside the nozzle 374. The teeth 379 in the first plug 376 are configured to retain the first plug 379 inside the nozzle 374, such that the first plug 376 cannot be easily removed without being damaged. As can be seen in Figure 38, the first plug 376 is hollow and defines a plug cavity 383 that is dimensioned to receive the second plug 377. Near the pull tab 378, the nozzle cover 372 has a frangible section 385 that is thinner than the rest of the first plug 376, such that the first plug 37 6 can be separated from the nozzle cover 372. As mentioned above, the second plug 377 is sized to fit within the plug cavity 383 when the first plug

<img file="MX338569B_D0036.tif" />

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY plug 376 is detached from cover 372 of bngnilla. Before packing, the first plug 376 is inserted into the nozzle 374 to prevent leakage during packing, also as before initial use. Before use, the user pulls the nozzle cover 372 from the nozzle 374 via the pull tab 378. As the nozzle cover 372 is pulled, the frangible section 385 breaks such that the first plug 376 remains inside the nozzle 374 as evidence that the nozzle cover 372 was removed. When the pump head 375 pumps the fluid, the fluid passes through the cavity 383 in the plug. If desired, the user can reseal the nozzle 374 by inserting the second plug 377 into the plug cavity 383. The second 377 plug is configured to be repeatedly removed and reinserted into the nozzle

374 .

A pump assembly 390 with a tamper evidence element in accordance with yet another embodiment is illustrated in Figure 41. As shown, a nozzle cover sheet or foil 392 seals the outlet port 130 of the head 177 pump. Cover sheet 392 is sealed to pump head 177 after pump functionality is tested. In one form, the nozzle cover sheet 392 is attached to the pump head 177 via heat sealing, but it should be appreciated that the nozzle cover sheet 392 can be attached in other ways, such as

<img file="MX338569B_D0037.tif" />

IMPI

ΛΛ MJEXICAN INSTITUTE • *** DCLAP&gt; OR «€ DAO íncmjstwial as through an adhesive. The nozzle cover sheet 592 has a pull tab 394 to pull the nozzle cover sheet 392 from the pump head before use. The pump assembly 390 in Figure 42 further includes a protective cap 396 that provides additional protection for cover sheet 392. After the cover sheet 392 is removed, the user can reattach the protective cap 396 over the outlet port 130 of the pump head 177 for hygienic purposes, if desired. In one form, the protective cap 396 is made of plastic, however the protective cap 396 can be made of other materials in other embodiments.

Figure 42 illustrates a further embodiment in which a pump assembly 400 includes a pump cap 403 that covers the pump head 177. After the function of the pump is tested during assembly, the cover 403 is fitted on the pump head 177 in order to prevent accidental pump actuation. In one form, pump cap 403 is detachably coupled to body skirt 188

205 pump via a tear band 405 with a pull tab 407. Before initial use, the user tears the band 405 by pulling the pull tab 407. After use, the user can retrieve the pump 177 with the cap 403, if so desired.

It must be recognized that the evidence elements of

<img file="MX338569B_D0038.tif" />

^{, N}Mexican STITUTE of La mopiedad w; ^{,I know}^ ~ f · INDUSTRIAL SSr-SK *! · ^ i Tampering with the modalities described above can be used individually or together in various combinations. Furthermore, it is contemplated that the tamper evidence elements may be modified for use with other types of pumps, in addition to those shown in the figures.

While the invention has been illustrated and described in detail in the Figures and the foregoing description, it is considered that it is illustrative and not restrictive in character, it will be understood that only the preferred embodiment has been shown and described and that all changes equivalents and modifications that come within the spirit of the invention defined by the following claims are desired to protect. All publications, patents and patent applications cited in this specification are hereby incorporated by reference as if each individual publication, patent or patent application is specifically and individually indicated to be incorporated by reference and summarized in its entirety herein.

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MEXICAN INSTITUTE

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