Spray pump capable of being actuated by a hand lever and pump dispenser

(57)

A spray pump (3) operable by a hand lever (5) and mountable on a bottle (2) or similar container, comprising a piston (6) of the pump (3) movable linearly in the pump chamber (7) formed in the housing (4) . The piston (6) of the pump (3) is connected behind the back of the outlet nozzle (9) to the hand lever (5) and returns to its initial position by the pressure of the return spring (8). The essence consists in connecting two joints (I, II) with the hand lever (5). One of the joints (I) is positioned so as to be displaceable in a linear guide on the housing (4), and the other joint (II) is fixed to the housing (4) at the end opposite the spout opening (9), the two joints. (I, II) are connected to each other by tilting continuous bridge sections (a, b). A pump dispenser comprising a housing (4) defining a chamber (7) of a pump (3) and having an open front end, the rear of which is connected to the inlet channel section (49) and the downwardly facing portion (62). 54) for attaching to the bottle (2) the piston (6) movable in the chamber (7), the nozzle (9) in the front end of the piston (6), the inlet valve element (V2) connected to the inlet channel (49), the outlet valve element (VI) connected to the connecting channel (32) and the lever (5). The pump dispenser further comprises a link mechanism for guiding the lever (5) formed by bridge sections (a, b), a pair of grooves (10) and a pair of pins (11) forming a hinge (I), and further comprising a hinge (II) at the rear end bushings (4).

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Hand lever operated spray pump and metering pump

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray pump operable by a hand lever and adapted in particular for mounting on a bottle or the like, comprising a sliding pump piston which is linearly slidable in the pump chamber. The pump piston is connected to the hand lever behind the spout orifice and is returned to the starting position by the force exerted by the return spring.

BACKGROUND OF THE INVENTION

A spray pump of this kind is described in US-PS 4 955 511. In this case, the hand lever is designed as a trigger lever which is fixedly connected to the pump piston. This creates a tendency in the unit formed by the piston and the pump chamber to tilt the piston towards the pump chamber.

US-PS 3,726,442 shows the construction of a hand-operated spray pump, the actuating lever of which is pivotably coupled to the housing by means of a joint formed by opposing divergent pockets and engaging pins. The lever cooperates at a distance from them by means of a flexible hinge with a thrust piece, in this case formed by a bladder pump chamber, connected on the side facing away from the nozzle outlet opening by another flexible hinge to the housing. A thumb closes and opens the air compensation hole as required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hand lever operated spray pump design which is functionally reliable and structurally simpler.

SUMMARY OF THE INVENTION

This task is solved by a spray pump with a control pump 1 1111 · O · »········ · · · · · · · · · · · · · · · · · · 11111111 1111 according to the invention, the essence of which is contained in the characterizing part of claim 1, characterized in that a first joint and a second joint are associated with the hand lever, wherein the first joint is movable in a linear guide on the sides of the housing and the second joint is connected to the housing on the side facing away from the nozzle opening, the two joints being joined together by two pivotable bridge sections. This solution eliminates the tilting forces acting on the pump piston.

The hand lever controls the combined movements, represented by both swinging movements and sliding movements. The required linear guide is secured by the housing wall. During these movements, the resulting approach of the two joints to each other is simply compensated by the pivoting or folding movement of the bridge sections. This movement can even be used in the articulated connection to exert a force to return the pump piston to its starting position. The pivoting movements of the bridging sections can then be used for other functions in that one bridging section carries a closure part for the ventilation opening which, when tilted, moves out of its sealing position. With this solution, the problem of equalizing air pressure is solved in the simplest way. Since the pivoting movement occurs only when the pump is activated, the contour of the pump according to the invention is kept as low as possible in terms of space. This has advantages in terms of storage and packaging. This constitutes a difference from the object disclosed in US-PS 3,726,442, which only reduces the volume and height of the pump during operation of the pump.

In addition, the solution according to the invention includes the suggestion that the two bridge sections be joined together by a flexible hinge consisting of a weakened bridge thickness, so that there is no need for conventional hinge pins. The second bridge section is further preferably formed to form a U-profile web surrounding the housing also having a U-profile. This ensures a firm connection and guiding of the webs.

• 4 4444 44 44 » 4 4 4 4 4 4 » 4 4 4 4 4 4 » 4 444 44 4 &gt; * 4 4 4 44 4

44 44 44

In a further preferred embodiment of the invention, the U-profile bridge is connected by a male connection of a portion of the U-profile to the housing. In order to provide for the necessary mobility of the bridge section at this location, it is further proposed that a second articulation point located on the side of the spray pump facing away from the nozzle aperture is located next to the insertion joint and formed in the form of a flexible hinge formed of polymeric material . Thus, no displacements due to the movement of the bridge sections occur at this point.

A further substantial improvement of the spray pump according to the invention is that the piston of the pump tapers and extends almost to the nozzle orifice and is fitted with a shaped connection in the nozzle head at the end and an outlet valve formed by a deformable rubber part. This solution is a design simplification that facilitates assembly and requires fewer components. The rubber part is of such a type that it remains closed until a certain pressure threshold is reached and then suddenly opens. This produces a violent jet of spray liquid, especially if it is further suggested that the rubber part is provided with a collar, expansible liquid pressure and mounted at the front end of the pump piston, and has axial flow holes in the disk base portion displaceable by pivoting the nozzle head into coaxial flow position. nozzle hole. The basis of this solution is the eccentric position of the outlet orifice, so that the spray pump is also preferably formed in terms of liquid loss. Advantageously, the spray pump housing is shaped for fitting to the throat by sliding it into the throat and clamp elements. .This fastening replaces the union nut that has been used until now. The plug-in joint can simultaneously form a sealed joint after adding the ring.

bottles and securing in this snap fastening

In another preferred particular embodiment of the invention it is manual

9999 99 ···· 9· 99 • · · · · 9 9 9 9 9

9 9 9 9 9 9 9 9 9 — 4 — * * *··· 9 9 9 9 9 9

9 ·· 9 9 99 9 9 99 9 • 9 9 '9 »9 99 99 99 The pump is equipped with a disc inlet valve with a valve closing body supported by radial arms, and a return spring for returning the piston of the pump piston is supported on the disc inlet valve. the opposite end is supported by a degree of constricting eccentric cross-section within the pump piston formed in the form of a hollow body, wherein the pump piston is slidably mounted with its peripheral edge on the inner wall of the pump chamber in its section with a larger internal diameter. The edge edge is preferably in the form of a frustoconical cuff.

It is also advantageous if the pump piston is provided with lateral pockets for hinge elements formed on the sides of the hand lever, the hinge elements being axial pins of the hand lever extending into the linear guide of the housing.

A preferred variant of the air compensating device is to use the pump piston to control the operation of the device. In this variant, it is proposed that the wall of the housing around the pump chamber be provided with a ventilation opening communicating with the inner space of the bottle and located in a basic position immediately beyond the peripheral edge of the pump piston and closed pump piston in its basic position; opened. This solution gives the pump piston an additional function of acting as a slide. For this function, it is not even necessary for the casing wall of the piston to be in the form of a guide surface, but it is sufficient that the piston is provided with two piston rings which are located on both sides of the vent opening in the basic position of the pump piston. This preferred embodiment of the invention reduces the friction surface of the pump piston and thus facilitates the actuation of the pump trigger. In addition, the advantage is that by providing an annular space, the sealing effect of the piston ring located towards the outlet opening is increased on the piston ring. · ♦ * ····· · · 4 · 4 · 9 9 ···

4 «···· front of the piston pump, due to overpressure generated by the cylinder due to heat.

Another particular preferred embodiment of the invention relates to an inlet valve for supplying a spray agent to the pump chamber. This advantageous solution consists in that the inlet valve is formed by a disk-shaped valve inlet body which is symmetrical to the median plane of the disc. This mirror-symmetrical design of the disc body allows it to be mounted in any lateral position, so that in no case can a reverse mounting be avoided and there is no need for additional work operations if the disc body were mounted upside down and had to be moved to the correct position. The correct function of the valve disc body is thus reliably ensured in any position.

It is also advantageous if the inlet valve has a valve closure body having a barrel-shaped design with bilaterally semicircular ends. The valve closure body is located in the center of the inlet valve disc body.

A further preferred embodiment of the invention relates to an outlet valve in a spray nozzle. The principle of this advantageous embodiment consists in that the outlet valve surrounded by the nozzle head is provided with front supply ducts which can be closed to the nozzle opening by turning the nozzle head. This is achieved by such a design in which the outlet valve is formed by a rubber deformable part provided with a stem, the stem carrying at one end a cylindrical stopper with two diametrically opposed flattenings to form channels from which the front inlet channels are led into the central swirl chamber . Since the plug part contains a considerable volume of material, it is virtually non-deformable, so that the cross-sectional area of ​​the inlet ducts can remain virtually unchanged even under the considerable pressure of the spraying agent, φ · φ · · φ · φ · · φ · φ

O zatímco φ · φ · · · o o o o o o o o zatímco o zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco zatímco flexible and can exert a restoring force for returning to the original position, which is an important characteristic for performing the valve function.

In order to allow the nozzle outlet opening to be closed, it is advantageous if the swirl chamber is positioned eccentrically so that it can be displaced to the likewise eccentrically located axis of the nozzle outlet opening, i.e. to a coaxial position, or can be reversed from the coaxial position sprayer path interrupted.

Another advantageous embodiment of the invention comprises a particular embodiment of the axis of rotation and the insertion connection of the second bridge element with the housing, characterized in that the insertion connection of the second pivotable bridge section is formed on the housing side by an insertion hook. a second articulation point is formed on the rearwardly extending bracket of the housing. In this solution, it is structurally advantageous that the retracting hook is pushed through the opening in the rearwardly directed housing bracket in front of the support web, located rearwardly behind the opening which is part of the second hinge and parallel to the shank of the retracting hook section. The close proximity of the support web and the retractable hook provides the necessary clearance in the joint which allows the second bridge section to swing.

This also contributes to the flexibility and ability of the material used, particularly plastic, to stretch and contract again.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a spray pump attached to the bottle and positioned in the starting position; FIG.

00 Fig. 2 is a side view of the same spray pump in the operating position, Fig. 2. Fig. 3 is a longitudinal vertical section of the pump in the initial position, with dashed lines showing the operating position of the pump components; Fig. 4 is an axonometric view of the pump piston with the discharge valve and the nozzle head being exploded; 5 FIG. 6 shows a modified spray pump in the same illustration but in the operating position; FIG. 7 is an axonometric view of a modified embodiment of the discharge valve shown on a larger scale compared to FIG. 6; and FIG. 8 is a separate plan view of the inlet valve as well as on an enlarged scale from FIG. 6.

DETAILED DESCRIPTION OF THE INVENTION

Sprayers_Ř the pump 3 according to the invention is mounted in the tapered neck 1 of the bottle 2. In this embodiment, the spray pump 3 is formed by a trigger pump. This assembly forms a stable device, designed as a dispenser for spraying liquid doses.

The main part of the spray pump 3 is a sleeve 4 which extends transversely to the substantially vertically oriented throat 1 and has the shape of a T-shaped body. The throat 1 can be gripped as a support handle for actuating the trigger. In the effective area of ​​this holding handle there is a hand lever 5 extending from the underside of the housing 4.

The hand lever 5 is pivotable about the horizontal first hinge 1 of the actuating mechanism when it is pulled toward the neck 1. The pulling action is against the spring force, which 99 99 9 9

9 9 9

9 9 9

9 9 9

99 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 is shown in dashed lines in FIG.

The hand lever 5 is articulated on the pump plunger or piston 6 which moves into the pump chamber 2 forming the pump cylinder.

The connection of this hand lever 5 to the pump piston 6 is formed such that, besides its pivoting movement, the hand lever 5 is simultaneously moved together with the pump piston 6 by a linear movement in the pump chamber 2. This movement takes place against the compressive force of the return spring 8 located in the interior of the pump, trying to return the pump piston 6 to its initial position. This return spring 8 is in the form of a helical compression spring.

The shifting movement of the hand lever 5 is effected by means of a linear guide provided on the inside of the housing. This guide is formed by longitudinal grooves 10 extending from the tubular end of the sleeve 4 facing the nozzle opening 9 of the outlet nozzle. These longitudinal grooves 10 are open to the forward end of the tubular portion of the housing 4, extending in diametrically opposed positions in the longitudinal direction in a length determining the length of the operating stroke of the pump. Two axle pins 11 forming part of the first hinge 1 are formed on the hand lever 5 and slide along the walls of the longitudinal grooves 10 until they engage the inner end 12 of the longitudinal grooves 10.

The axle pins 11 travel by a pair of opposing longitudinal grooves 10 and have ends extending in each case into the respective receiving pocket 13 on both longitudinal sides of the pump piston 6. The drive of the pump piston 6 in the direction in which the volume of the pump chamber 2 decreases is provided by the movement of the axle pins 11 in the longitudinal grooves 10.

• t · · * ♦ «« «« 9 9 9 9 9 9 9 9 9 9

9 9 9 9 9 9 9 9 9 9 9

99 99 99 99 99

The hand lever 5 is connected by means of a chain of links to the housing 4. In particular, this is achieved by the fact that the hand lever 5 comprises two hinge points, namely the aforementioned first joint X and the second joint II located on the rear side. a pump housing 4 opposite the nozzle opening 9 of the outlet nozzle.

The two joints I, II are connected together by two mutually pivotable bridge sections a, b. The pivoted position is shown in Fig. 2a. 3. To allow the bridge sections a, b to swivel from the original position on the housing 4, these bridge sections a, b are connected together a joint 15, which is preferably in the form of an elastic joint by weakening the walls of the bridge sections a, b.¹ V-shaped side walls of which extend to the opposite side walls 16 of the hat-shaped second bridge section b of the gable foot section 17 of the hand lever 5, the foot section 17 having coaxially formed axle pins 11 on its inner section.

Therefore, the second web section b forming the web extending into the substantially vertically oriented side walls 16 is U-shaped in cross-section.

On the other hand, the heel section 17, which is connected to and part of the first bridge section, has a closed wall towards the gripping portion of the hand lever 5 with an opening 18 allowing the free passage of the tubular end of the sleeve 4 to pass freely there. This opening 18 is in the form of an insertion opening for mounting.

The second bridge section b carries a closure portion 19 which tightly closes the vent opening 20 coaxially positioned in the basic position of the pump. This vent opening 20 connects to a connecting duct 21 passing vertically through the housing 4 and connected to the inner space 22 of the bottle 2. 2, the closure portion 19 is raised above the mouth of the vent opening 20. In FIG. In this position, the loss of the discharged partial quantity of liquid 23 contained in the bottle 2 can be replenished by the supply air.

As can be seen from FIG. 3, the bridge sections a, b are in the basic position of the spray pump 2 tightly mounted on its planar horizontal top 24. When the liquid outlet is released, both bridge sections a, b move upwards and deform into a roof-like manner. shape and move away from the upper side, bending in the hinge 15 formed. by weakening the wall up to the form of the notch 15 ', weakening the wall of the bridge sections a, b to the form of a flexible film without losing the lateral guidance of the guide walls formed by the side walls 16 of the second bridge section b abutting the vertical lateral surfaces support with both heel sections 17.

The free end of the second bridge section b opposite the nozzle opening 9 terminates in a downwardly directed U-shaped end section. This end portion 25 represents an extension of the second bridge section b having a U-shaped cross section so that the second bridge section b forms a web profile. A locking pin 26 is formed on the inside of each side leg of the U-profile, which fits into the opposite locking recess 27. This snap-fit ​​connection of the U-shaped end portion 25 to the housing 4 is particularly evident from FIG. 3. The snap-in recess 27 is connected to an opening 28 facing away from the nozzle opening 9. The inner diameter of the opening 28 is slightly smaller than the cross-section diameter. circular snap pin 26.

The U-shaped profile of one of the link chain is ♦ · · · · · · ·

-11- at the height of the second joint II longitudinally and horizontally incised by longitudinal slits 29 extending in the side arms of the U-profile up to the flexible hinge 15 and the rear side of the hand lever 5. The longitudinal slits 29 form edge material bridges in the flexible hinge 15 and the second hinge II.

The second hinge II is thus also formed by weakening the wall to form a flexible flexible hinge. The side walls of the notch with a V-shaped cross section are diverted outwardly and diverging from each other. The second hinge II, which is formed on the side of the housing 4 facing away from the nozzle opening 9, is located slightly above the engagement of the engaging means. pin 26 into the recess 27.

An eccentric arm forming an eccentric stage 30 extends from the cylindrical piston section of the pump piston 6, from which the piston 6 tapers towards the nozzle opening 9, this tapping extending almost to its end. This creates a kind of piston spindle 31, which forms a connecting channel 32 between the pump chamber 7 and the orifice 2. The piston 6 of the pump is thus connected to the orifice head 33 on the side of the orifice 9. The nozzle head 33 is snapped non-releasably, and a cup-like annular collar 35 serves to form such a connection. The annular wall of the annular collar 35 surrounds the tubular front end 36 of the piston spindle 31 or the actual piston 6 of the pump.

A discharge valve VI formed in the form of a deformable molded rubber element is disposed in the space between the front end 36 and the mounted nozzle 33.

This deformable rubber element is formed by a collar 37 which is fitted to the tubular end end 36 of the pump piston 6. An integral disk base portion 38 is further formed on the rubber element. In this base portion 38, axially oriented flow openings 39 are formed. The flow openings 39 can be connected by pivoting the rotatably mounted nozzle head 33 on the annular collar 35 of the pump piston 6 to the supply line 40. The respective opening and closing positions are defined by stops. The front edge of the nozzle head 33 keeps the storage pockets 13 closed at the nozzle opening side.

The flow openings 39 and the supply line 40 are disposed eccentrically with respect to the horizontal axis xx of rotation of the hat-shaped nozzle head 33, whose axis coincides with the median longitudinal axis of the pump piston 6.

The shut-off valve VI functions in the same way as a hose valve by expanding the collar 37 at the fluid pressure.

The liquid supply for the expansion of the collar 37 is provided by the windows 41 formed in the wall of the tubular end 36. From this window 41 the liquid penetrates into the annular chamber 42 formed between the casing wall of said tubular end 36 and the inner wall of the annular collar 35. is closed on the side facing the piston 6 by the transverse wall 43 of the piston spindle 31.

Closer to the inner space 22 of the bottle 2 is an inlet valve V2, which is also made of an elastic material and has a disk-like design. This inlet valve V2 is provided with a centrally located valve closure body 44 supported by radial arms 45, allowing free passage therebetween. The arms 45 extend substantially radially and preferably are curved in an S-shape to achieve the necessary closing and opening compliance of the valve closure body 44 having a valve abutment surface 46 on the side facing the housing.

• · • · · · • · · ·· · · · · · • · 0 · · · · · · « « · 9 9 9 9 9 9 9 9 9 ·

The inlet valve V2 is supported on the bottom 47 of the pump chamber 7 located on the side opposite the orifice 9 and is held in position by a return spring 8 to return the pump piston 6 to its starting position by pushing the last return spring 8 into the inlet valve disc. VI to the bottom 47 of the pump chamber 7.

The opposite end of the return spring 8 for returning the pump piston 6 exerts a pressure on stage 30, which reduces the internal diameter of the cavity cross-section within the pump hollow piston 6.

As can be seen in FIG. 3, the end of the piston 6 of the pump opposite the end supported on stage 30 is provided with a rotationally symmetrical annular lip forming an annular edge 48 at its free edge, while the cross-section of the remaining cylindrical wall is located at a distance from the wall of the pump chamber 7. The larger diameter of the edge 48 moves along the inner surface of the peripheral wall of the pump chamber 7.

The valve seating surface 46 adjoins a short horizontal channel section, which then passes into a vertically oriented channel section 49. This vertical channel section 49 continues with a connecting piece 50 in which a riser tube 51 is reached, reaching its bottom end almost to the bottom of the bottle 2. .

For sealing the connection of the spray pump 3 to the bottle 2, the housing 5 is provided on its underside with an annular wall 52 which is tightly pressed into the opening of the mouth of the neck 1 to form a tight joint.

To clamp the spray pump 3, the sleeve 4 is slidable onto the neck 1 of the bottle 2 by a plug-in and clip-on connection. For this purpose, a push-on collar 53 is provided, which is provided with a 9 * 9 * 9

9 9 9 «

9 The locking fingers 54 are engaged by the retaining flank 55 formed on the neck 1 of the bottle 2, thereby forming a non-detachable connection. The retaining flank 55 is formed on the underside of the circumferential rib formed on the circumferential surface of the neck 1 through which the locking fingers 54 can slide during a sliding forward movement in which they act as latches.

The retaining flank 55 forms the upper side of the latch groove 56 on the sleeve surface of the neck 1 and the bottle 2, which latch groove 56 is formed so wide in the circumferential direction of the mouth 1 that it corresponds to the width of the bent locking fingers 54. Thus, for a T-shaped spray pump 3, a final alignment of the spray pump 2 relative to the bottle body 2 is provided, which is formed in a flat shape oriented in a direction coincident with the directional adjustment of the spray pump 3. ·

In addition, it should be noted that the two supply lines 40 are formed on the front side of the outlet valve body VI and tangentially terminated into the collecting space forming the swirl chamber 57. This produces a rotational effect ensuring a permanently stable liquid spray jet.

The discharge valve Vl is mounted in the annular chamber and secured against rotation by an eccentric protrusion 58 that fits into a recess (not shown) formed in the annular collar 35.

The variants of the exemplary embodiment of the spray pump 2 shown in FIGS. 5 to 8 have a substantially similar construction. Therefore, they are retained for the same components.

<img file="CZ20000802A3_D0003.tif" />

the same reference numerals and basic explanations of exemplary embodiments that are the same are not repeated in the following sections.

First, a modified air pressure equalization device will be described. In this example, the device is moved for actuation to the area of ​​operation of the pump piston 6, which forms the immediate functional part of the device. The pump piston 6 acts as a sliding slide valve.

In particular, the device is designed such that the housing wall 60 is provided with a vent hole 61 in the diameter of the neck 1 of the bottle 2. This vent hole 61 provides a flow connection with the shortest possible flow path between the pump chamber 7 and the interior 22 of the bottle. it is located within the region of the underside of the housing 4 bounded by the annular wall 52, the annular wall 52 being sealed into the mouth of the neck 1 of the bottle 2.

In the initial position of the spray pump 2 shown in FIG. 5, the vent opening 61 at its end facing the pump chamber 7 is formed in the form of an orifice 62 which is closed by the casing wall of the pump piston 6. As can be seen from this example, this orifice 62 extends immediately beyond the peripheral edge 48 of the pump piston 6 acting as the first piston ring 63.

The second piston ring 64 is located at an axial distance toward the nozzle opening 9 of the spray pump 2. The two piston rings 63, 64 taper toward their free peripheral edges and are in the form of annular inclined blades. The piston rings 63, 64 are recessed with respect to the discharge direction and form an angle of about 30 ° with the xx axis.

the position of the spray pump 3 shown in FIG

In basic • · · · - 16 - 9999999 · 99 99 999 99 99 9 · 99 9 9 99 9

99 * 9 99 9999 in Fig. 5, the vent opening 61 lies approximately midway between the two piston rings 63, 64. spaced axially apart and defining an annular space 65 therebetween. The overpressure generated, for example, by heat is thus transferred to the annular space 65 . This causes loading of the side of the second piston ring 64 facing the annular space 65 and pressing it even more force against the cylindrical peripheral wall of the pump chamber, so that the sealing engagement at this point is increased. Thus, when the bottle 2 is inverted, no liquid can escape.

In the operating position of the spray pump 3 (FIG. 6), the interior 22 is communicated via the vent 61 to the ambient atmosphere. On the outlet side, i.e. after the second piston ring 64, a free open outlet path is created by a deliberate leak between the sleeve 4 and the nozzle head 22. The effluent dose of liquid 23 is replaced by the same amount of suction air.

When the hand lever 5 is released, the piston 6 of the pump is moved back to its starting position as shown in FIG.

The inlet valve V2 in this variant of the exemplary embodiment of the spray pump 3 is designed such that, regardless of which width side the inlet valve V2 abuts on the bottom 47 of the pump chamber 7, a functionally correct seating is achieved. For this purpose, the inlet valve V2 has a mirror-symmetrical configuration. The disc body of the inlet valve V2 in this exemplary embodiment is again formed of a returnable deformable shape memory material and is provided with a valve closure body 44 located in the center of the disc body. The valve closure body 44 is also hinged on the radial arms 45 in this example, but the two ends of the valve closure body 44 have the same shape, i.e., barrel-shaped.

<img file="CZ20000802A3_D0004.tif" />

the formed closure member has axially, double-sided, convex, hemispherical ends, one end of which faces the valve abutment surface 46 and cooperates with the bottom 47 to secure the opening of the opening. The central axis of the barrel-shaped closure body 44 is coincident with the axis xx of rotation of the cap-shaped nozzle head 33, and this axis also coincides with the longitudinal center axis of the piston 6 of the pump.

The circumferential ring also extends rotationally symmetrically to both sides and on one side serves as a bearing for its last return spring 8 with its one annular arm 8 to return the pump piston 6 to its initial position and the other arm on the opposite side is received in an annular groove with corresponding shape. The radial arms 45 are, as shown in FIG. 8, in the plane of the inlet valve V2, are S-shaped, so that they have sufficient reserves of resilient possibilities to provide the valve function. The web ring has practically a T-shaped profile with a center web directed towards the center of the valve closure body 44. The median plane EE is shown in Figure 5.

A variation in the design of the outlet valve VI is that the cap design of this valve is replaced by a solid body modification, different from the illustrated embodiments of Figures 5 and 8.

The outlet valve VI is, as in the previous example, housed in the nozzle head 33 such that the inlet ducts 66 formed on the front side of the outlet valve VI can be covered from the outside with respect to the nozzle opening 9. The guide element for guiding the rotational movement is an annular collar. 67, formed on the piston shaft 31 and rotatably supported in a corresponding annular groove 68 of the nozzle head 33. At the same time, the non-detachable engagement of the two parts is provided by this arrangement.

·· 9999 4· 99

-4 · 4 4 4 4

4 4 4 4 4

4 4 4 4 4 4

9 4 · 4 4 4 • · · · · ·

<img file="CZ20000802A3_D0005.tif" />

The outlet valve VI formed in the form of a deformable rubber part comprises at least partially a valve plate 69 and a coaxially-connected stem 70 extending into the expanded plug member 71. All these components of the outlet valve VI have a generally rotationally symmetrical configuration, on a substantially cylindrical of the plug member 71, flattenings 72 are formed at two opposite locations. These flattenings of the honeycomb wall of the plug member 71 together with the cylindrical inner wall of the nozzle head 33 form longitudinal channels 73 having a cross-sectional shape in cross-section. Said flattenings 72 are diametrically opposed and in the example of FIG

Flattening 7 2. the longitudinal channels formed by them adjoin the corner in the flow direction to the inlet channels 66 formed on the face of the plug member 71. The inlet channels 66 extend tangentially into the annular swirl chamber 74. The two tangential inlet openings are also diametrically opposed. The inlet ducts 66, which in the end face of the plug part 71 appear as grooves in FIG. 7, are closed from the outside by the inner surface of the bottom of the nozzle head 33.

The swirl chamber 74 is positioned eccentrically with respect to the xx axis of rotation of the nozzle head 33. The same arrangement applies to the nozzle opening 9 forming the spray nozzle of the spray pump 3. The nozzle opening 9 can be displaced by rotating the nozzle head 33 so that the nozzle opening 9 exits the inlet region of the swirl chamber 74 and is thus closed and sealed by the channel-free portion of the face of the outlet valve VI, which acts as a shut-off element.

The valve function of the valve disc 69 is such that the upper portion of the valve disc 69 shown in the drawings is inclined in the flow direction as a valve valve when the liquid flows.

<img file="CZ20000802A3_D0006.tif" />

9999

9 9 9 ·

9 9 9 9 9

9 9 9 9

99 99 a flap to the shape shown in FIG. 6 with dashed lines. The connection channel 32 provides a stable support stage 76 extending perpendicular to the axis of rotation xx by providing a valve flap seat 75 having a clearly larger diameter than the segmental cross-sectional connection channel 32. The discharge valve VI in this embodiment can simply be slid from the open end of the valve receptacle 75. The nozzle head 33 is then fitted as a closure cap.

The stem 70 of the outlet valve VI is mounted with an axial orientation in the region of the support stage 76.

In the region of the second hinge II, another type of bearing is provided comprising a vertically oriented lock between the swinging bridges (sections a, b) and the sleeve 4. · The locking connection on the sleeve side of the second swinging bridging section b is formed by an engaging hook 77 formed on the second bridging bridge. the end ba at its free end, with its own hook 78, passing through an opening 79 formed in the bracket 80 of the housing 4. The bracket 80 is on the housing 4. This anchored attachment is evident from the examples shown in FIGS. 5 and 6. These examples also show that the engaging hook 77 is formed adjacent to the support web 81. Its front face facing the upper surface of the bracket 80 of the sleeve 4, upon contact with the upper surface of the bracket, forms a second hinge II. This contact point is located near but rearward of the opening 79 so that it is offset outwards. The support web 81 extends substantially parallel to the shank of the retractable hook 77. The shank also has, to some extent, a spring function similar to that of a leaf spring, and can extend to some extent also in length, as can be seen from the exemplary embodiment of FIG.

The support web 81 is part of the end of the pivotable bridge section b.

4 4 · 4 · • · · · * 4 • 4

4

4 4 4 4 ® 4 4 4

4 4 4 4 4

4 4 4 4

All of the described features of the spray pump according to the invention are important for achieving the effects envisaged in the invention.