Canister filter system with drain that cooperates with filter element.

(54) Title: CARTRIDGE FILTER SYSTEM WITH DRAINER THAT COOPERATES WITH FILTER ELEMENT.

(54) Title: CANISTER FILTER SYSTEM WITH DRAIN THAT COOPERATES WITH FILTER ELEMENT.

(57) Summary

A filter element (30) disclosed herein includes a center tube (32) defining a center tank (55) and including an interior side wall (62); the filter element (30) further includes an end plate and a receptacle (36) defining a port (54) that extends from the end plate into the central tank (55); the receptacle (36) includes an interior wall (56), an exterior wall (57), and a plurality of ribs (59) extending from the exterior wall (57) of the receptacle (36) towards the interior side wall (62 ) of the central tube (32).

(57) Abstract

A filter element (30) disclosed herein includes a center tube (32) defining a central reservoir (55) and including an interior sidewall (62). The filter element (30) further includes an end píate and a pocket (36) defining a port (54) extending from the end píate into the central reservoir (55). The pocket (36) includes an inner wall (56), an outer wall (57), and a plurality of projections (59) extending from the outer wall (57) of the pocket (36) toward the interior sidewall (62) of the center tube (32).

Institute

Mexican Property

Industrial

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PATENT TITLE NO. 336142

Headlines)

Home:

Denomination:

Classification;

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CATERPILLAR INC .; ADVANCED FILTRATION SYSTEMS, INC .; DONALDSON COMPANY, INC.

100 NE Adams Street, Peoria, Illinois, 61629-9510, USA; 3206 Farber Drive, Champaign, Illinois, 61822, USA; 1400 West 94th Street, Bloomington, Minnesota, 55431, USA

CARTRIDGE FILTER SYSTEM WITH DRAINER THAT COOPERATES WITH FILTER ELEMENT. ti lnt.CI.8: B01D35 / 153; B01D35 / 16

ARK ¡AND Al. TO

RLnnis m. deedi rEISENMENGER 'ADOR; ;; JOHN * patent of reference «itorgacoij • conformity with artl ilo 23 of I anteda from the date of presJ Done *.

«Have subscribe the presen! Industrial property (Pian

REQUEST

Internship filing date!

September 2011

PRIORID

Date:

October inmente an lo!

Law of PropiMUIni pation of the iconal aoücffllh

V, 6 * Ul fraction, jtjÉ patent jgafc wniaá

12 / 896.5 »^ HlrProperty ti Rntsafiosimi to keep lustrial.

bgables, Intes loa

JB ^ PWccíones lll y 7 · bis 2 de la Sel02 / 08/1994, 25/10/1996, 26/12/1997, T iy de la 15/1999, icción V subsection a), 4 ° and 12 ° fractions I and lll of the Regulation 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); items 1^or. 3^or. 4 ", 5 'fraction V item a). 16 sections I and lll 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); 1, 3 and 5 “subsection a) of the Agreement that delegates powers to the Deputy Directors General, Coordinator, Divisional Directors, Holders of Regional Offices, Divisional Deputy Directors, Departmental Coordinators and other subordinates of the Mexican Institute of Industrial Property. (DOF 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007).

title I Official d &lt;01/2006,

Issue Date: January 8, 2016

THE DIVISIONAL DIRECTOR OF PATENTS

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NAHANNY CANAL REYES

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Arenal No. 550. Floor 1,

Col. Pueblo Santa María Tepepan,

Xochimilco Delegation,

CP 16020, Mexico. DF

Tel (55) 53 34 07 00 www.impl.gob.mx

MX / 2016/2768

CARTRIDGE FILTER SYSTEM WITH DRAINER THAT CO

336W WITH FILTER ELEMENT

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(all Property

IndusW

TECHNICAL FIELD

The field of this publication is that of filter systems. More specifically, the field is that of liquid cartridge filter systems, such as lubricating oil or liquid fuels, which have drains to remove fluid from the cartridge.

BACKGROUND OF THE INVENTION

Cartridge filter systems are widely used today in equipment such as internal combustion engines, construction and mining machinery, and many other types of industrial machinery. They are used to filter fluid contaminants in fuel systems, lubrication oil systems, hydraulic fluid power systems, hydraulic fluid control systems, transmission fluid systems,

<img file="MX336142B_D0008.tif" />

air intake systems for engines and the like.

A cartridge filter system typically includes a base that is often connected to the equipment, a cartridge (also sometimes called a housing, cup, can, or cover), and a filter element that is movably positioned within the cartridge. After it has been

<img file="MX336142B_D0009.tif" />

By positioning the filter element inside the cartridge, the base lime is clamped with threads or other clamping means to form a proprietary MM Compartment sealed around the filter element. The cartridge, base, and filter elementfPdWfilat cooperate to define fluid pathways through which fluid is directed by the filter element. The filter element contains filter media that traps and collects contaminants as fluids pass through it. Trapped contaminants can include dirt, water, soot, ash, metal particles, and other harmful debris.

Finally these contaminants clog the filter media and reduce its efficiency. Or other conditions may develop over time that also reduce the effectiveness of the filter media in removing contaminants. When this occurs, the filter element must be replaced (or possibly cleaned, but this is impractical for most applications). But only the filter element should be replaced, while the cartridge, base, and other components are reused. The filter element is designed to be conveniently replaced and easily discarded. The filter element can be replaced upon request, that is, when the filter becomes clogged and requires replacement, or periodically, according to the guidance of a periodic maintenance program established for the particular application.

Cartridge filter systems can have many advantages over other filter systems, such as screw-on filters. For example, cartridge filter systems may be provided with a drain so

I ο relatively inexpensive. To avoid spills, a technician may wish to remove the fluid from the cartridge in a controlled and contained manner. Adteta BsspledacS IncWrtof disassemble the cartridge to replace the filter element. The drain facilitates the removal of fluid that is inside the cartridge. In some circumstances fluid may spill if it is not removed from the cartridge first before removing the cartridge from the base. The drain is typically integrated into the cartridge. Since the drain on a cartridge filter system generally increases only the cost of the cartridge, reuse it and buy it only once, and generally it does not increase the cost of the filter element, which is frequently replaced and purchased. Often times, the added cost of including a drain does not appreciably increase the total operating cost to the equipment owner.

US Patent No. 6,814,243, issued November 9, 2004, (the '243 patent) is an example of prior art cartridge filter systems incorporating a drain in the cartridge. Figure 1 of the '243 patent illustrates a cartridge 14 with an integrated drain (the drain is not marked with a reference character, but is shown incorporated into the cartridge bottom 14 in Figure 1, and is shown in the closed position) .

The '243 patent is also an example of another increasingly important feature of cartridge filter systems. The arrangement of the filter system described in the '243 patent makes it impossible to install the cartridge to the base, without first installing a filter element properly in

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the cartridge. This avoids, for example, intentionally or accidentally starting Maxhan's machinery without the filter element in place.

Industrie ^ that components such as fuel pumps, fuel injectors, hydraulic pumps, valves, bearings, motors, etc., are made more expensive and high-tech, and are manufactured with tighter tolerances and specifications, is becoming Most importantly, protect these components from contamination. Contamination can cause premature wear and even breakdown, and the problem is compounded when the component has tight tolerances between parts or is very expensive. Thus, it cannot be very advantageous in some applications to ensure that a technician does not intentionally or accidentally start machinery without a proper filter element in place.

However, although the filter system of the '243 patent works well in some applications, it may suffer from several disadvantages, or is not otherwise suitable for other applications. For example, the filter system of the '243 patent may not be suitable for applications where the fluid in the cartridge is under high pressure. Since the connection of the cartridge to the base is through the filter element, the high pressure force in the cartridge is reacted by the filter element, which cannot be strong enough for the pressures of some applications. Additionally, the o-ring between the cartridge and the base is not intended to maintain high pressure within the cartridge.

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The presence of threads in the central tube of the Proα Pro0led0d filter element may be a disadvantage in some circumstances. The threads on the central inflow tube, which is used to connect the filter element and cartridge to the base, are located in the clean fluid path outside the system. Threads in the clean fluid path can contribute to contamination.

Furthermore, the system cartridge described in the '243 patent can be relatively complicated and expensive to manufacture for some applications. The connection structure built into the bottom of the cartridge can add too much to the cost for some applications.

Because of these drawbacks, another cartridge filter design is needed that still avoids intentional or accidental use of the filter system without a filter element installed, but is also exempt from some or all of the disadvantages exhibited by the patent. ' 243.

BRIEF DESCRIPTION OF THE INVENTION

A filter element disclosed herein includes a central tube defining a central reservoir and including an interior side wall. The filter element further includes an end plate and a receptacle defining a port that extends from the end plate to the central tank. The receptacle includes an interior wall, an exterior wall, and a plurality of protrusions extending from the exterior wall of the receptacle toward the interior side wall of the center tube.

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Another filter element disclosed herein includes allWtltutO

Mexican central tube defining a central tank, a first end plate ^ lCbhS ^ te &lt;faid gasket circumferentially formed around the first end plate, the gasket being configured to be spliced ​​with a cartridge. The filter element further includes a second end plate opposite the first end plate and a receptacle defining a port that extends from the second end plate to the central tank. The receptacle includes an inner wall that has threads configured to butt the gasket to the cartridge by receiving a mutually threaded drain.

A filter system disclosed herein includes a filter element that includes a receptacle. The filter system further includes a drain including an intermediate portion having a stop and an end portion configured for insertion into the receptacle of the filter element.

Another filter system disclosed herein includes a cartridge that includes an open end and a closed end, a drain that is threaded and spliced ​​with the closed end of the cartridge, and a filter element comprising a central tube defining a central warehouse. The filter element further includes a first end plate, a gasket circumferentially formed around the first end plate, a second end plate opposite the first end plate, and a receptacle defining a port that extends from the second end plate to the central tank. . The receptacle includes an interior wall that has

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threads configured for mutual connection with the threads of the drain. EMsxIcan © de Property Drain has a closed position where the threads of the sJndudriot drain butt each other with the threads of the inner wall and the gasket is spliced ​​with the open end of the cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a sectional view of a cartridge filter system, including a base, a cartridge, and a filter element.

Figure 2 is a detailed view of Figure 1 with the drain in the closed position;

Figure 3 is a detailed view of Figure 1 with the drain in the closed position;

Figure 4 is a cross sectional view of an alternative embodiment of filter element 30 with drain 40 shown in the closed position.

Figure 5 is a cross sectional view of the filter element 30 of Figure 4 with the drain 40 shown in the open position;

Figure 6 is an enlarged cross-sectional view of the angle formed between a shoulder 59 and the outer wall of the receptacle 36.

DETAILED DESCRIPTION OF THE INVENTION

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Mexican Industrial Property

The following is a detailed description of exemplary embodiments of the invention. The exemplary embodiments described herein and illustrated in the drawing figures are intended to teach the principles of the invention, allowing those skilled in the art to make and use the invention in many different environments and for many different applications. Exemplary modalities should not be considered as a limiting description of the scope of patent protection. The scope of patent protection will be defined by the appended claims and is intended to be broader than the specific modalities described herein.

FIG. 1 illustrates a cartridge filter system 1 having a base cartridge 20, and a filter element 30. The general construction and use of a cartridge filter system are within the understanding of those skilled in the art. Thus, it is not necessary to explain here all the details of the construction and use of the cartridge filter system 1. The cartridge filter system 1 can be used to filter fluids, such as diesel or gasoline intake air for an engine. Cartridge filter system 1 can also be used as a fuel / water separator filter. The cartridge filter system 1 with the characteristics described herein could be

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or other liquid fuels, lubricating oil, hydraulic fluid for hydraulic power systems, transmission fluid or even possibly

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adapted by those skilled in the art to fulfill many purposes Wi? Ulo

Different Mexican and fit many other applications.

Base 10 includes an inlet channel 11 for the inlet of • fcH fluid into cartridge filter system 1, and an outlet channel 12 for fluid outlet from cartridge filter system 1. The base also includes threads base 13.

Cartridge 20 includes an open end 21 and a closed end 22. Adjacent to open end 21 are cartridge threads 23 that can be spliced ​​with base threads 13 to retain cartridge 20 in base 10. Threads are an example of splice structures that can be included in base 10 and cartridge 20 to form a releasable splice. Other splice structures can be used, as will be recognized by those skilled in the art.

Filter element 30 can take many different forms to suit a particular application. In the illustrated embodiment, the filter element 30 is suitable for filtering fuel or lubricating oil. Filter element 30 may include filter means 31 annularly arranged and circumferentially surrounding a central reservoir defined by central tube 32. The axial ends of filter means 31 are sealed by the end plates. Open end plate 33 defines an axial open end of filter element 30. Open end plate 33 is called open because it includes an opening 35 to allow the passage of fluid to the outlet channel 12 of the central tank defined by central tube 32. The license plate

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closed end 34 defines an axial closed end of filter element 3ΐΜθχίααηο cto ta Property

The closed end plate 34 is called closed because it prevents some fluidinduiftiat outside the filter element 30 adjacent to the axial end of the filter means 31 from flowing without being filtered to the central tube 32. The open end plate 33 and the closed end plate 34 can in each case joined to the central tube 32 by means of welding, adhesives, etc.

Alternatively, several or each of the central tube 32, the open end plate 33 and the closed end plate 34 can be constructed as unitary components.

The fluid to be filtered enters the inlet channel 11 and flows into the annular cavity 28 between the cartridge 20 and the filter means 31. The fluid then passes to and through the filter means 31, then into the central tube 32 through the Perforations shown therein in Figure 1. Fluid exits center tube 32 through open end plate 33 and opening 35 into outlet channel 12. The open end plate 33 and the closed end plate 34 help define the fluid channels in and out of the filter media 31, preventing any fluid from flowing directly into the outlet channel 12 and bypassing the filter media 31 First and second annular seals 38 and 39 can be advantageously included in filter element 30 and help define and seal fluid pathways in and out of filter element 30. A first annular seal 38 may be included in the open end plate 33 around opening 35 and adjacent the axial open end of filter element 30 to assist in sealing the inlet channel with respect to outlet channel 12. A second annular seal ³⁹Mteican diameter greater than the first ring seal 38, may be formfcaai_Ft ^ and * circumferentially around the open end plate 33 to provide the gasket between the cartridge 20 and the base 10, or in other words it provides a gasket to prevent fluid in the inlet channel 11 from leaking from the junction between the cartridge 20 and base 10. The first and second annular seals 38, 39 may be integrally formed with the open end plate 33, or joined with adhesives or other methods, as is known in the art. When the first and second annular seals 38, 39 are integrally formed or included in the open end plate 33, proper replacement of these seals is ensured when the filter element is replaced at appropriate intervals. Otherwise, a technician may stop appropriately replacing the seals at appropriate intervals, which could result in system leakage or leakage within the system, allowing unfiltered fluid to bypass filter element 31 and lead to to pollution.

Referring now to Figures 2 and 3, a drain 40 penetrates closed end 22 of cartridge 20. Drain 40 provides a drain channel 41 to remove fluid from within cartridge 20. Drain 40 is elongated and includes one end inlet 42 and an outlet end 43 connected to each other by drain channel 41. Inlet end 42 is positioned inside cartridge 20. Outlet end 43 is positioned outside cartridge 20. Drain 40 can move between a closed position and an open position. In the closed position of Figure 2, fluid cannot flow through drain channel 41. In the POSITION of the Open Property of Figure 3, fluid can flow from inlet end 42, at^ravand^slndusfrtcjt from drain channel 41 and out from outlet end 43. The drain can be adapted to suit many different applications.

The illustrated mode provides only an exemplary configuration for drain 40.

Cartridge 20 includes a drain boss 24 on the closed end 22. Drain boss 24 protrudes out and from the closed end 22 and can include surfaces thereon that would allow a tool, such as an adjustable end wrench. open, butt to drain boss 24 and rotate cartridge 20. Drain boss 24 forms a bore 25. Drain 40 is positioned at, and can slide axially and rotate in bore 25. An O-ring groove 44 is formed around the exterior of drain 40 and an O-ring is positioned therein. Alternatively, the o-ring groove may be formed on hole 25. The o-ring prevents fluid leakage from cartridge 20 through hole 25 between drain 40 and drain boss 24.

Drain 40 can cooperate with filter element 30, to form a releasable joint with filter element 30, and a releasable joint with filter element 30, when drain 40 is in its closed position. In the illustrated mode, drain 40 forms a releasable splice with filter element 30 through splice structure including

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a releasable threaded connection. The closed end plate 34 may form a cone of Property receptacle 36 in which threads 37 are provided. Threads 37 are formed on an inner surface of receptacle 36. Mutual threads 45 may be formed near inlet end 42 drain

40. Drain 40 may be spliced ​​with filter element 30 by threading threads 37 and 45 together. Threads are an example of splice structures that can be included in filter element 30 and drain 40 to form a releasable splice. Other known splice structures can be used to their particular advantage in certain applications, as will be recognized by those skilled in the art.

When in its closed position, with drain 40 releasably spliced ​​with filter element 30, a release seal is made with filter element 30 so that virtually no fluid can enter the inlet end 42 of drain 40. The releasable joint is made with the joint structure which, in the illustrated embodiment, includes an inlet opening 46 which extends between the drain channel 41 and the radial exterior of the inlet end 42 and the receptacle 36 that receives the opening for inlet 46 when drain 40 is sealed. Putting drain 40 in its closed position moves inlet opening 46 into receptacle 36, blocking inlet opening 46 so that virtually no fluid can enter it. Additionally, an o-ring groove 47 may be formed in drain 40 and an o-ring positioned therein. This o-ring can provide additional protection so that fluid does not leak from between drain 40 and receptacle 36 or into the opening d

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entry 46.

o-ring portion of

Instead of positioning the o-ring within the receptacle, the closed end plate 34 could also be positioned between the drain 40 and the other, and the o-ring could be positioned in a slot formed in the closed end plate 33 and not in the drain 40. By moving drain 40 to its closed position, as it advances to receptacle 36, the fluid trapped therein may need an escape route. This pathway can be provided by allowing drain channel 41 to be opened by inlet axial end 42 of drain 40.

Receptacle 36 includes an open end 36a, a smooth section 36b, a threaded section 36c, and a closed end 36d. Closed end 36d ensures that no fluid can flow from center tube 32 to receptacle 36 and inlet opening 46, and vice versa. Threads 37 are formed in threaded section 36c. The smooth section 36b can act as part of the sealing structure by tightly fitting against the surfaces of the drain 40 to prevent fluid from entering the medium and flowing from the open end 36a to the inlet opening 46. The smooth section 36b can also provide a surface against which the o-ring in the o-ring groove 47 can seal for additional protection against the passage of fluid. To help maintain the smoothness of the surface of the smooth section 36b, the diameter of this section may be greater than the larger diameter of the threads 37, forming a rim 36e between the smooth section 36b and the threaded section 36c. The larger diameter of the smooth section 36b will help prevent

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threads 45 in drain 40 degrade the smooth surface used coftterfGGno efe faith heritage sealing purposes.

When in the open position, the drain 40 is at least partially detached from the filter element 30 and the inlet opening is opened so that the fluid can drain into the drain channel 41. In the embodiment illustrated with a threaded connection, the fact Putting drain 40 in the open position requires turning drain 40 to unscrew threads 37 and 45. As threads 37 and 45 are uncoupled, inlet end 42 of drain 40 emerges from receptacle 36, unlocking inlet opening 46. Together, these features ensure that no fluid can enter inlet end 42 of drain 40 except when inlet opening 46 has been removed from receptacle 36, clearing smooth section 36b and open end 36a. The fluid is then free to flow from the inner cartridge 20, through the inlet opening 46, through the drain channel 41 and out through the outlet end 43 of the drain 40.

The threads 37 and the receptacle 36 in the filter element 30 need not be formed in the closed end plate 34. The threads 37 and the receptacle 36 could also be formed as part of the central tube 32 or some other part of the filter 30, as will be understood by those skilled in the art.

Other features and constructions can be used to provide cooperation between drain 40 and filter element 30 so

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that fluid cannot flow through drain 40 when drain 40 is in the closed position and fluid can flow through drain 40 cCtóH0 &lt;Peipl® &lt;áC3 € l

Industrio ^ drain 40 is in the open position. For example, filter element 30 and drain 40 could be constructed so that drain 40 forms a releasable joint with filter element 30 to close drain 40, but the two cannot be releasably spliced. Instead, as an example, filter element 30 and drain could be independently spliced ​​with cartridge 20, and moving drain 40 to a closed position would involve moving drain 40 up to form a releasable joint with the filter element 30, but not releasably splicing therewith.

The releasable splice and the releasable seal between drain 40 and filter element 30 have several advantages. First, the splice and / or seal ensures that a filter element 30 is placed within the inner cartridge 20 before the system can be used. A technician does not intentionally or accidentally assemble the system without a filter element 30 because, without it, drain 40 cannot be closed. Ensuring the presence of filter element 30 helps to ensure that fluid is properly filtered.

Without threaded connections in the clean fluid path from center tube 32 to outlet channel 12, the possibility of contamination is reduced. Threaded connections in the clean, filtered fluid path have been identified as a potential source of contamination. When they are cut or formed

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Institute threads in other ways on a metal component, or even a Macano-owned plastic component, often leave a small amount of Industriad debris on the threads. When the threaded connection is made, the waste can be removed by the threading action and is then free to enter the clean fluid path and result in contamination of the downstream components. Thus, avoiding threads in the clean fluid path eliminates this potential source of contamination.

The provision of threads on filter element 30 provides a convenient means to repair the threaded connection, if the threads cross or are damaged in any way. If there is a threaded connection between cartridge 20 and drain 40 (as in prior art systems), cartridge 20 or drain 40, or both, should be replaced if the threads cross or are otherwise damaged . If threads 37 formed in filter element 30 are formed of plastic, while threads 45 in drain 40 are formed of a harder material (possibly aluminum or other metal), when threads 37 and 45 cross, then More than likely only threads 37 will be damaged. Threads 37 are easily replaceable by replacing filter element 30. Lastly, the junction between drain 40 and filter element 30 provides a means to firmly retain the filter element within cartridge 20.

Retaining filter element 30 inside cartridge can have some advantages during installation and replacement of filter element 30. For example, cartridge 20 can be turned upside down by a technician to drain residual fluid from it, without dropping filter element 30. Also, filter element 30 may be in the correct position within cartridge 20 so that when cartridge 20

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is connected to the base 10, the filter element 30 is properly aligned with the characteristic elements of the base 10.

Other advantages can also be realized in some applications. In some applications, the manufacture of cartridge 20 can be simplified because no structure is needed to butt the drain (eg threads) into the cartridge.

Drain boss 50 makes it easy to rotate drain 40 to move it between its closed and open positions. The drain boss may optionally be positioned around the drain 40 on the outside of the cartridge 20. The drain boss 50 includes ribs that match the ribs 48 formed on the outside of the drain 40. The splines 51, 48 allow the prominence of drain 50 to move axially with respect to drain 40 (along an axis parallel to the rotational axis of drain 40), but rotatably joins the two together. Rotating the prominence of drain 50 will cause a corresponding rotation of drain 40.

In addition, drain boss 50 includes cam surfaces 52 that mate with mutual joint surfaces 26 on drain boss 24. A spring 53 acts between drain 40 and drain boss 50, prestressing the cam surfaces. 52 so

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splice with the cam surfaces 26. When the cam surfaces

Mexican and 26 are spliced ​​into each other, they allow drain 50 prom ^ lib ^^ ® ^^ to rotate with respect to cartridge 20 only in one direction. The cam surfaces 52 and 26 may be formed to allow rotation of the drain boss 50 and drain 40 in the direction of their closed position (clockwise in the illustrated embodiment), but prevents drain 40 from rotating counterclockwise to its open position unless cam surfaces 52 and 26 are unscrewed. They can be uncoupled by pulling the drain boss 50 against the pretension of the spring 53 and separating the two cam surfaces 52, 26. The cam surfaces 52, 26 allow relative rotation in one direction by providing cams whereby the cams they can slide each other in one direction. The cam surfaces 52, 26 prevent relative rotation in the other direction by providing positive stop surfaces that intervene or collide.

A spring 27 may optionally act between drain 40 and cartridge 20. Spring 27 pretenses drain 40 toward cartridge 20. This may provide advantages in inserting and removing filter element 30. For example, in cooperation with the prominence of drain 50, prestressing drain 40 upward causes the cam surfaces 52, 26 to splice and temporarily block rotation of drain 40 in one direction. With spring 27 positioned as shown in the figures and with cam surfaces 52 and 26, a technician can install a filter element

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replacement simply by holding cartridge 20 with one hand and rotating filter element 30 with the other hand to use filter element 30 (drain element 30 with drain 40.

Cartridge filter system 1 can be assembled by first positioning filter element 30 within cartridge 20. Cartridge 20 includes an open end 21, through which filter element 30 can pass, and a closed end 22. In Next, drain 40 is made to splice to filter element 30. Drain 40 passes through hole 25 in cartridge 20, with inlet end 42 protruding toward the cartridge to splice to filter element 30.

Preferably, filter element 30 and drain 40 are first fully spliced, thereby simultaneously moving the drain to a closed position, before cartridge 20 is finally spliced ​​with base 10 to complete the assembly. .

With the first and second ring seals 38 and 39 (see figure

1) integrally formed with or attached to filter element 30, many of the surfaces and gaskets that provide a sealing function in system 1 will be replaced when filter element 30 is replaced. This helps to ensure that system 1 functions properly. throughout his life.

Figures 4 and 5 illustrate an alternative embodiment of axial closed end plate 34 of filter element 30 and drain 40. The figure shows this alternative embodiment when drain 40 is in the

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closed position within the receptacle 36 which is arranged in the pl of the axial closed end property 34 of the filter element 30. Figure 5 illustrates alternative embodiment when the drain 40 is in the open position and the inlet opening 46 is generally outside the receptacle 36 of filter element 30.

Receptacle 36 defines a port 54 extending from closed end plate 34 to central reservoir 55 of central tube 32. Receptacle 36 has an inner wall 56 and an outer wall 57. Threads 37 may be formed on a surface of the Inner wall 56 of receptacle 36. Threads 37 are configured to butt the second annular seal 39 of filter element 30 with the open end 21 of cartridge 20 by receiving drain 40 mutually threaded.

A slot 47 may be formed in drain 40 and a gasket 58 may be positioned therein. Seal 58 may be an O-ring in some embodiments. This O-ring 58 can provide additional protection against fluid leakage into inlet opening 46. Instead of positioning the O-ring 58 within receptacle 36, the O-ring 58 could also be positioned between the drain 40 and another portion of the closed end plate 34, and the O-ring 58 could be positioned in a slot formed in the plate closed end 34 and not in drain 40. When moving drain 40 to its closed position, as it advances into receptacle 36, the fluid trapped therein may need an escape route. I know

<img file="MX336142B_D0028.tif" />

tuto cano de ta Property indurtrtar can provide this route by allowing drain channel 41 to be abj ^ via the inlet axial end 42 of drain 40.

Receptacle 36 may include a plurality of protrusions 59 connected to outer wall 57 of receptacle 36 and extending from outer wall 57 toward an inner side wall 62 of center tube 32. Prints 59 may be of any shape extending out from the outer wall 57 of the receptacle 36. The shoulders 59 have a rounded projection 60 and an outer edge 61 that is generally adjacent to the inner side wall 62 of the central tube 32. The outer edge 61 may be generally parallel to the inner side wall 62 of the central tube 32, but is not limited to a parallel structure.

Figure 6 illustrates an enlarged view of a portion of one of the shoulders 59 and the outer wall 57 of the receptacle 36. As shown in Figure 6, the shoulder 59 can generally form an angle a with the outer wall 57 of the pocket 36 In some embodiments, angle a can be a right angle or an obtuse angle.

As best seen in Figure 5, shoulders 59 may be dimensioned such that the height 63 of each shoulder is less than about half the length 64 of receptacle 36. Alternatively, shoulder height 63 may be greater than or equal to about half the length 64 of the receptacle 36. Various different shapes and dimensions and combinations thereof may be used for the shoulders 59. The shoulders 59 can be connected or fixed to the

Λ Üüksgg. outer wall 57 of receptacle 36. Alternatively, shoulders 59 may ^ ™ '¹ be integrally formed with the outer wall 57 or the closed plate 34 of the filter element 30. The number and spacing of the projections on the outer wall 57 may vary, as can the placement of the projections 59 over the length of the wall Exterior 57. For example, shoulders 59 may be positioned on exterior wall 57 closer to the top of receptacle 36 than the bottom of receptacle 36.

The shoulders 59 can provide increased structural support and stability to the receptacle during use in a filter system. To do this, projections 59 can reduce deformation of receptacle 36 and port 54 that can occur during use in high pressure applications or that can occur with time due to normal wear.

Reduction in such deformation also minimizes degradation in gasket performance between drain 40 and receptacle 36 resulting from deformation of receptacle 36. Such degradation may cause leakage of a closed drain or blockage of drain 40 in receptacle 36, when an operator tries to open drain 40 to change the filter. When a drain 40 is so clogged, operators will often try to force the joint between drain 40 and receptacle 36 to release; this can result in drain 40 cracking or breaking.

The projections 59 can also reduce the leakage of the filter element 30 by facilitating the correct alignment of the central tube 32 and the means of

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filter 31 in closed end plate 34 during assembly. During the'}

Mexican assembly, center tube 32 can be aligned on ceri ^ M ^^^^ end plate by sliding center tube 32 along shoulders 59. Protrusions 60 of shoulders 59 indicate initial tube positioning and movement center 32 on or adjacent to the outer shoulder edges 61. Shoulder shoulders 60 provide the smooth alignment of the central tube 32 on shoulder 59. As discussed above, in one embodiment, each shoulder has a rounded shoulder 60. In other embodiments, shoulders 59 may have other geometry, such as tapered, beveled, or chamfered shoulders.

The closed end plate 34 may include a circumferential flange 65 and a plurality of ribs 66. The flange 65 may be attached to or integrated with the closed end plate 34. The ribs 66 may be disposed on the outer surface 69 of the flange 65. The The height 67 of each of the ribs 66 can vary with respect to the flange 65. The height of the rib 67 can be approximately the same height, shorter or longer than the flange 65. Ribs 66 can extend outwardly from flange 65 and can define conduits 68 in outer surface 69 of flange 65. These conduits 68 can carry fluid from gap 73 between filter element 30 and cartridge 20 to recess 70 of the cartridge to removal by drain 40. Ribs 66 can also facilitate optimal positioning of filter element 30 in cartridge 20 and facilitate fluid flow to gap 70.

The shape, amount, and spacing of rib 66 may vary in a disclosed embodiment, ribs 66 are a sharp edge.

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© usWT elongated. Another suitable geometry may be used which is helpful with uniform alignment of the filter element 30 in the cartridge 20 and provides a fluid conduit through the flange 65. The height of the rib 67 may, in some embodiments, be greater than half the height 63 of each of the shoulders 59 and, in other embodiments, the rib height 67 may be less than or equal to the shoulder height 63.

The drain 40 includes an intermediate portion 76 and an end portion 77. The end portion 77 of the drain 40 is configured for insertion into the receptacle 36 of the filter element 30. The intermediate portion 76 of the drain 40 may include a stop 71. The stop 71 may be a flange or other structure that extends a greater radial distance from the intermediate portion 76 of the drain 40 than the radial distance between the intermediate portion 76 of the drain 40 and the periphery of the open end 36a of the receptacle 36. The stop 71 is disposed between the bottom surface 72 of the closed end plate 34 and the bottom inner surface 74 of the cartridge 20 and can be received at the same level against the bottom surface 72 of the closed end plate 34. More specifically, when drain 40 is in the closed position, stop 71 is spliced ​​with bottom surface 72 of closed end plate 34, end portion 44 of drain 40 is not spliced ​​with closed end 36d of receptacle 36, and closed end plate 34 does not splice with closed end 22 of cartridge 20, which

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includes the lower inner surface 74 thereof. Furthermore, when the Impiety and the base 10 are completely sealed and the drain 40 is fully received in the receptacle, the stop 71 can help avoid over-tightening the drain 40 by providing stopping resistance. The stop 71 can also stabilize the drain 40 in the receptacle 36 during high pressure applications.

Filter element 30 can be assembled by surrounding center tube 32 with filter media 31 and positioning a lower end 75 of center tube 32 on shoulders 59. The center tube 32 is then slid over the length of shoulders 59 until the lower end of the central tube 32 makes contact with the closed end plate 34 and the receptacle 36 is received in the central tube 32. Open end plate 33 is positioned in filter media 31 and within center tube 32 until open end plate 33 contacts at the level of an upper end of center tube 32 and a flow path is defined from center tube 32 to through the open end plate 33 to the outside of the open end plate 33.

Industrial applicability

Cartridge filter system 1 can be used to filter contaminants from fluid systems including fuel systems, lubricating oil systems, hydraulic fluid power systems, hydraulic fluid control systems, transmission fluid systems, engine air intake and the like, while allowing

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drain the fluid conveniently using drain 40. Because of the property disposition of drain 40 with filter element 30, a technician is prevented from operating the operating system 1 accidentally or intentionally unless a filter element 30 is in the place. This operational limitation helps protect components that are sensitive to contamination.

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Mexican of industrial property