EP0791398B1 - Fluid discharge device - Google Patents

Abstract

The applicator comprises a body (5,6) and an operating component (4). There are medium chambers containing a pressure chamber (13) and an outlet channel (18) opening into a medium outlet (19). There is a shut-off component (20) with a direction of through-flow from the inside outwards, and two back and forth transferable shut-off elements (21,22). A shut-off actuator has a delay unit (30) for delayed release and transfer for the shut-off elements to one position.

Description

The invention relates to a discharge device according to the Preamble of claim 1. It is advantageous for Media, in particular flowable media, such as liquid, pasteuse, powder, gaseous and / or similar media intended.

The discharge device expediently has spaces for standing or flowing recording of the medium, with such spaces a pressure chamber, an inlet channel for filling the pressure chamber and contain an outlet channel for emptying them can. The media flow in at least one of these media rooms to throttle or block, a closure, for example a valve may be provided which is closed State, for example, the connection between the pressure chamber and interrupt one of the channels. With a manual Lock actuation, which is also the actuation of the Media release can serve, this closure should be repeated back and forth from the open to the less open or closed position can be transferred. Serves expediently the opened closure to it, which is under pressure Flow medium out of one of the media rooms into the next to let and after a corresponding decrease in this overpressure to close again depending on pressure.

The closure can also serve at the same time to in particular a volume-adjustable pump chamber bleed when they start operating the discharge device not yet with non-gaseous medium, but is filled with compressible medium such as air. Due to the the closure may open compressible properties only for a short time, so a fairly large number of actuation strokes is required to complete Ventilation or filling of the media room with the non-gaseous To achieve medium. This also applies if the closure depending on the actuation stroke, i.e. path-dependent, is opened and closed, because then the closure can close again at the beginning of the return stroke of the pump.

In a known discharge device according to the US-A-5 192 006 becomes an exhaust valve at the stroke end by stop open. The inlet valve is on during the return stroke frictional connection with the piston torn open and then remains in this second one until the next pumping stroke, opened locking position.

The invention is further based on the object of a discharge device for media, at what disadvantages known training or the type described avoided are and in particular an extension of the opening period the closure regardless of the pressure in the media room and / or from the operating position of the discharge device.

According to the invention, e.g. Features according to claim 1 intended. Means can be provided to close the closure in at least one of its closed positions, in particular the opening position, regardless of which Pressures act on both sides of the closure or which ones Operating position or operating movement of the discharge device given is. These delay means give the Delayed closure in one position so that it can then e.g. under one pressure or spring force, automatically into the other Location is transferred.

The closure is expedient towards the end of the actuation stroke the discharge or lock actuation in its open Position also held when the opposite direction Return stroke begins, expires or has ended. While This return stroke can transfer medium from the pressure chamber into the following Channel and from there, if necessary, through the media outlet to flow out into the open. After the time delay has elapsed, if necessary after the end of the return stroke or in the starting position of the Discharge device, the closure is released and jumps to its closed position.

With a very simple training, the closure is through disengageable interlocking adhesive or friction surfaces in the Secured opening position, against the holding force of the Adhesive surfaces permanently a counterforce, for example the Pressure or spring force acts. This will make the adhesive surfaces moved against each other and continuously increasing Engaged until they release each other and the closure in the closed position or the one determined by the stop Location jumps.

If the friction surfaces are in the area of a media room, then there are they dry before filling and therefore have an increased Friction effect. Flows through the vent into this media room Medium, the friction surfaces are wetted, which one Sliding lubrication equals. The holding force decreases as a result so that the delay means after venting during normal operation the discharge device much less or even are no longer effective.

As a result, the closure can also be used for the persistent Discharge operation of the discharge device effective valve, for example an outlet valve for the pressure chamber, which with each actuation stroke depends on the media pressure in the The pressure chamber opens and closes. Here, each time Sticky surfaces are brought into engagement with each other, act however, by the mentioned lubrication and / or by wear no longer as delayed as when commissioning the discharge device.

Fig.1

eine erfindungsgemäße Austragvorrichtung im Axialschnitt,

Fig. 2

eine weitere Ausführungsform einer Austragvorrichtung,

Fig. 3

eine weitere Ausführungsform im Axialschnitt,

Fig. 4

eine Stirnansicht des inneren Auslaß- bzw. Düsenkörpers nach Fig. 3,

Fig. 5

einen Ausschnitt einer Baueinheit der Austragvorrichtung nach Fig. 2 in teilweise geschnittener Ansicht,

Fig. 6

eine weitere Ausführungsform einer Baueinheit gemäß Fig. 5 und

Fig. 7

die Baueinheit gemäß Fig. 6 in Ansicht von oben.

These and further features of the invention are also apparent from the description and the drawings, the individual features being realized individually or in groups in the form of sub-combinations in one embodiment of the invention and in other areas and representing advantageous and protectable designs for which protection is claimed here. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:

Fig. 1

a discharge device according to the invention in axial section,

Fig. 2

another embodiment of a discharge device,

Fig. 3

another embodiment in axial section,

Fig. 4

3 shows an end view of the inner outlet or nozzle body according to FIG. 3,

Fig. 5

3 shows a section of a structural unit of the discharge device according to FIG. 2 in a partially sectioned view,

Fig. 6

a further embodiment of a structural unit according to FIGS. 5 and

Fig. 7

6 in top view.

The discharge device can be according to the patent application DE-OS 44 41 263.0 be trained, which is why for inclusion of the features and effects in the present application this patent application is referred to.

The discharge device 1 has two against one another Working movement, such as a linear stroke, manually movable Units 2, 3, which thereby a discharge operation 4th form. When actuated, the discharge device is in to hold a single hand and so with their fingers operate that it shortens and thereby the inside Medium is put under a discharge pressure. Each of the Units 2, 3 have a separate, one-piece Base body 5, 6, which is the outermost outer surface of the Device 1 can form.

The elongated base body 5 of the inner unit 2 forms an elongated housing 7, which with a fastener 8 on the neck of a memory 9 so rigidly fasten it with most of its length lies within the vessel 9. The components mentioned lie in a central or main axis 10 of the device 1.

The unit 3 contains an elongated displacement or Piston unit 11 and one outside the base body 5, 6 lying discharge or actuation head 12, which the Basic body 6 forms. This base body 6 can be made in one piece with the unit 11 or by one of them separate component be formed. In the housing 7 is one Elongated pressure or pump chamber 13 is provided, which on its outer circumference and on its inner end of the housing 7 and at the outer end of the unit 11 is limited. Outside the inner end of the housing 7 is an inlet 14 provided for the pressure chamber 13, which by a Füllbzw. Suction pipe can be formed, the medium from the floor area of the memory 9 by suction into the housing 7 and the pressure chamber 13 conducts. From the inner end of the housing 7 protrudes into this a projection or socket 16, in which the Medium from the outer end of the flexible hose 15 flows. In the housing 7 is another, directly to the Pressure chamber 13 subsequent inlet 17 provided over which the medium discharged from the nozzle 16 directly into the pressure chamber 13 flows. The connection between inlet 14, 17 and pressure chamber 13 can be formed valve-free or with be provided with a valve which, when pressure builds up in the Chamber 13 closes and at negative pressure in the chamber 13 Suction of another media fill opens.

The unit 6, 11 is of one adjoining the chamber 13 Exhaust passage 18 penetrates through which the medium below Overpressure is supplied to the media outlet 19 provided on the head 12 becomes. At outlet 19, the medium detaches from the device 1 outside. Between the chamber 13 and the channel 18 a closure 20, namely an outlet valve, is provided, wherein the actuator 4 also a shutter actuator for repeated opening and closing of the closure 20 forms. The closure 20 contains only two one-piece closure parts 21, 22, with which one directly to the channel 18 subsequent closure channel 23 in a position in Area of closing surfaces 24 closed pressure-tight and in the other position can be opened so that the medium between the closing surfaces 24 from the chamber 13 in the Channels 23, 18 flow. The flow direction 25 of the closure 20 is from the inside out, namely so directed as the medium through the inlet 14 into the housing 7, from the Chamber 13 out and flows along the channel 18. The In contrast, the actuating movement of the unit 3 is opposite directed. The completely within unit 11 lying closure part 21 is for the closed position with a Spring 26 loaded, which is completely on the unit 11th is stored or held.

The unit 11 forms a cup-shaped with its inner end Piston 27 with a cylindrical tubular piston jacket 28, the inner end of which is designed as a sealing lip 29 and seals the chamber 13 continuously over its circumference. At the at the other end, the piston 27 has a piston crown 31 Front wall, which is only inside the piston skirt 28 lies, forms the outer closure part 22 and in Center is penetrated by channel 23. The inner closure part 21 is with a sleeve-shaped and rigid support body 32nd secured against the piston 27 so that it opposite the piston 27 can perform axial relative movements. The Support body 32 engages in a fixed position at a distance from the closure part 21 in the inner circumference of the piston skirt 28 so that it protrudes into the chamber 13 via the sealing lip 29. The supporting body 32 is only by the spring 26 with the Locking part 21 connected, these components being a pre-assembled or can form a one-piece unit. To the Opening movement of the closure member 21 against the force of the always biased spring 26 under the excess pressure in the To effect chamber 13, a control piston 33 is provided Expediently formed by the closure part 21 and with this is formed in one piece.

Delay means 30 are provided for the closure 20, which cause the closure 20 after opening with the Lock 4 remains open longer than the case would be if it only by the on the control piston 33 acting pressure in the chamber 13 would be controlled. This Pressure usually drops at the beginning of the return stroke Unit 11 below the opening pressure of the closure 20, so that then the spring 26 immediately closes the closure 20 in its Would lead back to the closed position. This is done through the establishment 30 short time so that the closure 20 only after part of the return stroke or at the end of it closes, with the working stroke the volume of the chamber 13 is reduced and increased from the beginning of the return stroke. For Delay, the unit 2 has a closure holder 34, which the closure part 21 in the open position with respect to the base body 5 even if the Unit 3 executes relative movements or the return stroke and thereby the closure part 22 from the closure part 21 removed outside.

The holder 34 points to the housing 7 and completely inside lying on this a holding member 35, which by the freely protruding and slightly narrowed end of the nozzle 16 can be formed. The pin-shaped or tubular holding member 35 can be closed over the circumference and open at the free end his. It lies in contact-free manner within the chamber 13 which it doesn’t need to border against which it however due to the bending elasticity of the connector 16 Make slight radial movements in all directions can. To hold the closure part 21 or control piston 33 in the position mentioned is a counter member 36 provided that is formed in one piece with the parts 21, 33 can be and in the starting position shown in FIG Intermediate distance freely and coaxially against the holding member 35 protrudes from the closing surface 24 in the opposite direction 25.

The links 35, 36 have complementary engagement or Friction surfaces 37, 38 which, when the closure part 21 is open, if the spring 26 is maximally tensioned, with a predetermined Friction at the end of the actuation stroke of the actuation 4 mesh. The friction surface 37 of the holding member 35 is by an inner circumference and the friction surface 38 by a Outer circumference formed. When actuated, the friction surface approaches 38 from their spaced position of the friction surface 37 until they slides over insertion bevels into the holding member 35 and in the further course of this coupling and plug-in movement Friction increases. At the end of this movement is the counter member 36 by static friction against the holding member 35 and the Body 5, 7 centered with the closure 20 still closed fixed.

Is in the chamber 13 compressible medium, such as Air, the pressure build-up during the working stroke is usually sufficient not to open the closure part 21 or completely so to open that this air through the closure 20 is sufficient can escape into the channel 18. Starts from the end of the stroke the return stroke of the unit 6, 11, so the closure part 21 by the friction surfaces 37, 38 compared to the Unit 5, 7 initially held so that the closure part 22 removed from the closure part 21. At the same time the spring 26 loads the closure part 21 in the direction of Closure part 22 or to the closed position in one dimension, which overcomes the static friction. The counter member 36 therefore slides with a decrease in the frictional force along the friction surface 37 until it comes free from this and then the closure part 21 under the force of the spring 26 accelerated and smoothly into the closed position is transferred. In this closed position they beat Closing surfaces 24 then rigidly against each other, the Closing surfaces can be formed by complementary conical surfaces can and in particular the closing surface of the closure part 21 is an outer cone.

Has during the extended opening time of the shutter 20 the trapped air has enough time to expand and thereby escaping into the channel 18, which in part is promoted that through the inlet 14, 17 non-gaseous Medium is sucked into the chamber 13. This medium can from the end of the holding member 35 against that of the control surface flow away from the inside of the piston 33. Since the Friction surfaces 37, 38 are still dry when the device 1 is not in use the friction is higher at first. The tight fit between the friction surfaces 37, 38 is then, however, by the aforementioned Means wetted with the non-gaseous medium, so that in the sense of a reduction in the frictional force by the Medium results in lubrication, which is approved by the Closure holder 34 facilitated. In addition, the friction surfaces 37, 38 are trained so that they are proportional wear quickly after at least a few working strokes, that after the ventilation of the pressure chamber 13, the holding force is reduced so far that the closure 20 with the end of the working stroke or beginning of the return stroke closes.

The pressure-dependent opening path of the closure 20 is much smaller than that of the device 30 resulting opening path, so that when the opening pressure is reached in the chamber 13 of the closure 20 in the described Way opens before the lock holder 34 engages is coming. In particular in the case of the large opening path centered finding of the closure part 21 in the To ensure only the closed position, links can be used centered sliding guide of the closure part 21, the spring 26 or the piston 33 may be provided, for example guide webs on the inner circumference of the jacket 28, only in the closed position in the channel 23 protruding centering projection or the like. These links can be pressure controlled over the entire opening path Opening stay engaged and open through the device 30 come out of engagement, where appropriate Insertion bevels included to help with the closing movement of the Closure part 21 also in the centered position find when the closure member 21 is opposite the centering means approximates in an off-center position.

The mutual return movement of the units 2, 3 is by a lying within the housing 7 in the axis 10 Return spring 39, which acts as the spring 26 as a compression spring formed with resilient twisting deformation is. The spring 39 limits like the spring 26 and all supporting bodies 32, 41 the annular chamber 13 on the inner circumference and is with her associated end supported on the piston 27 via the support body 32. Their outside and inside width is larger than that of Spring 26 so that they are opposite the cylinder bore or Career 45 is non-contact. The other end of the spring 39 is on the support body 41 on the inner circumference of the housing 7 in Distance from the housing base 44 is supported in a fixed position.

Belong to a pre-assembled or one-piece unit 40 the parts 21, 26, 32, 33, 39, 41, the respective support body 32, 41 by a snap connection or an interference fit so with the inside of the associated jacket is connected that the medium can flow past it, namely along its outer circumference, possibly with depressions or passage openings is provided. Between the annular disk-shaped body 41 and the bottom 44 is another tubular extension 49 is provided, which have the same cross-sections how the spring 39 can have and against this is shorter. The inner end of the extension 49 is below Prestress on webs on the inside of the bottom 44, see above that the transition 17 is formed between the radial webs over which the medium along the bottom 44 from the Unit 40 flows radially outward into chamber 13. The Extension 49 is part of the unit 40 and can in the Center the inner circumference of the housing 7.

The unit 40 or its adjoining longitudinal sections enclose a chamber 42 which is only in the bottom area is connected to the chamber 13 via the inlet 17. In the chamber 42, the nozzle 16 including the Holding member 35 as well as the counter member 36 in the described Way into it without contact. Like the chamber 13 too the chamber 42 narrows during the working stroke and during the return stroke expanded. The longitudinal sections 26, 39, 49 of the jacket boundary of the chamber 42 are each through axially compressible, resilient hose sections formed, whose outer and / or inner circumference thread-like one or several helixes, namely spiral grooves and between form these spiral bars so that the jacket thickness is continuous is about constant. In contrast, the support body 32 or 41 a larger wall thickness, in particular a larger one Jacket thickness so that it does not deform elastically during operation becomes. The helixes on the slope Unit 11, 32 supported end of the spring 39 opposite the Unit 5, 7 around the axis by a predetermined amount, for example, rotated more than 30 °. The friction force between the end of the unit 40, 49 and the bottom 44 of the Chamber 13 is only so high that the supported end of the Section 49 by a smaller amount of rotates for example about 10 °, but then stops becomes. This leaves in addition to the spring 39 axial restoring voltage a twisting about the spring axis 10 Reset voltage, by which the spring force is increased. During the rotation, one of the two supporting bodies can 32, 41 turn, especially the body 41. A corresponding The spring 26 also executes torsional movement.

The the storage space of the memory 9 with its outer circumference delimiting jacket 43 of the housing 7 forms with the inner circumference also the race 45 for the piston end 29 and goes in one piece into the bottom 44 penetrated by the tube 15. On this connects in one piece to the connector 16, in which the Tube 15 protrudes with a press fit. Subsequent to the outside The end of the track 45 is an extended one compared to this Raceway 47 formed by the housing shell, on which a further piston 46 of the unit 11 continuously over the circumference sealed runs so that the outer end 48th the housing space is tightly closed. The piston 46 lies at an axial distance from the piston lip 29 in the region of the piston crown 31 and is completely in one piece with the piston 27 educated.

1 protrudes the connector 16 or the holding member 35 in the piston 27 and the support body 32. The jacket of the neck 16 is from a transfer opening 50, for example one Longitudinal slot, which penetrates at a distance from the holding member 35 lies and the other end in the region of the body 41 is provided. As a result, the free end of the connecting piece 16 or the holding member 35 including the friction surface 37 the scope should be closed throughout. This end forms another forehead or transition opening. The flow cross sections the transfer openings are much larger than that of the inlet openings 17, so that the latter according to Art a throttle. Are both chambers 13, 42 with medium completely filled, so the medium is out during the working stroke the chamber 42 via the transfer openings 50 back into the Memory 9 pressed. In the chamber 13, however, is in the generates the overpressure described by which the Medium after opening the closure 20 pressed to the outlet 19 becomes. The inlet 17 acts in a similar way closed inlet valve so that the medium from the chamber 13 not or only insignificantly via the inlet 17 back in the chamber 42 can flow. Medium flows on the return stroke on the one hand via the nozzle 16 and 50 passage into the chamber 42 and on the other hand simultaneously from the chamber 42 over the Inlet 17 into chamber 13, causing all the chambers again are filled. If the closure 20 is still briefly not closed, the media outlet 19 acts according to Art an exhaust valve as a throttle, through which not or only insignificant air are sucked into the media rooms 13, 18 can.

In the embodiment according to FIG. 2, the holding member 35 or the friction surface 37 is not continuous over the circumference, but only bowl-shaped over an arc angle of more than 180 °. The associated slot end of the transition 50 can therefore be open here or in such a way that it is not as shown in FIG. 1 connects to a narrow pipe socket. The support body 41 can also be designed so that it has axial and rotary movements the spring 39 with and only acts centering, so that the section 49 as the spring 39 as a return spring for the unit 3 serves. Section 49 is approximately the same length here like the spring 39.

3, the holding member 35 projects in the starting position not up to the piston 27, but in the end position of the Working strokes also in sections 26, 32. The holding member 35 is here up to its free end from the transition slot 50 enforced. The support bodies 32, 41 only protrude the outer circumference of the resiliently deformable sections 26, 39, 49 before. About the chamber between the pistons 27, 46, the annularly limited by the track 47 and the jacket 28 is, the memory 9 is ventilated. The piston 46 seals this chamber only in the starting position from the outside and releases openings in the actuated end position what air from outside into this annulus and from there can flow directly into the memory 9. The memory 9 is otherwise sealed by the base body 5, which for the storage opening formed by the storage neck a peripheral seal formed in one piece with it having.

According to Figures 1 and 2, the outlet axis 51 of the Outlet 19 transversely or at right angles to axis 10 in head 12, the direction of flow from the single nozzle opening 19 is directed away from the axis 10. The upstream End of the one-piece limited end and nozzle channel 55 borders directly to a guide device 54, which according to FIG. 1 from the bottom of a cup-shaped nozzle cap and one into this engaging nozzle core of an atomizer nozzle may be limited can. The nozzle core is in one piece with the body 6, 12 formed and the nozzle cap directed against the axis 10 inserted into an annular groove-shaped receptacle of the head 12 that the medium is directed against the axis 51 of the guide device flows into this, in the control device in a Rotational flow offset about axis 51 and then transversely or is diverted directly into the nozzle channel at right angles, which with a narrowing in the flow direction Section can connect to the control device. According to Fig. 1, the guide device is formed by a depression, which only on the inner circumference of the bowl and on the bottom surface of the bowl bottom of the nozzle body is provided is, this bottom is penetrated by the nozzle channel.

2 is that of the rectilinear end channel 55 and Opening 19 penetrated outer or second outlet or Nozzle body 53 formed in one piece with the body 6, 12, while the inner, first outlet body 52 integrally with the Unit 11 or at least one of the sealing members 29, 46 trained and with this completely outward from the outer circumference the body 5, 6 is covered. The recess 58, the bottom and side surfaces of the guide surfaces of the facility 54 form, are only in the outer peripheral surface 57 of the body 52 is provided, which about the axis 10 sleeve-shaped bwz. through a limited and thickened peripheral portion of a sleeve shell is formed. The recess 58 is on the outer circumference 57 from the inner or Circumferential surface of the body 53 bounded by a peripheral portion of a one-piece sleeve is formed and from the outermost end wall of the head 12 Direction 25 protrudes freely into the head 12. Within this A sleeve is also formed in one piece with the head 12, bolt-shaped core body 61 from the inside of the Front wall of the head 12 and engages with its outer circumference sealed in the inner circumference of the body 52. The sleeve 53 and the core body 56 delimit one with their groove flanks around the axis 10 limited, groove-shaped receptacle 60, at the Grooved flanks of the body 52 with its inner and outer Circumferential surface tightly sealed with pressure is. The outlet channel 18 is approximately from the channel 23 and the Bottom 31 starting from the inner circumference of the body 52 and from The outer circumference of the body 61 is limited and by a groove formed, which is provided exclusively in the core body 61 can be. Between the bottom of the groove 60 and that immediately opposite end edge of the body 52 is a distance provided so that here a transverse channel 59 between the end of the outlet duct 18 and the inlet of the guide device 54 is formed. The transverse channel 59 can be ring-shaped around the axis 10 go through.

According to FIGS. 5 to 7, the depression 58 forms in the Axis 51 is only open on the circumference and to the nozzle channel 55 Swirl chamber 62, in which tangentially one or more Swirl channels 63 open. Each groove-shaped swirl channel 63 is sufficient to the end edge of the body 52 and is so immediately on the cross channel 59 connected. The bodies 6, 12, 61 can due to alignment surfaces 64 only in a single rotational position about the axis 10 with the body 11, 52 so axially plugged together be that the axes of the device 54 and the Channel 55 coincide. The medium flows out of the channel 23 in direction 25 directly against the free end face of the Body 61 is between this end surface and the bottom 31st deflected transversely to the axis 10 to the entrance of the channel 18 and flows in this direction 25 again to the transverse channel 59. In the transverse channel 59, the medium flows in the circumferential direction as well transverse to axis 10 along the end edge of body 52 immediately in the entrance of the guide channel 63 and in this opposite direction 25 to chamber 62.

The unit 11 has a unique design and directly connected to the head 12, sleeve-shaped Piston shaft 65, which according to FIG. 1 the associated Section of the channel 18 completely delimited while he was it 2 limited only on the open long side of the groove 18. 2, the body 52 is through the outer End portion of this shaft 65 is formed, being substantially same inside and / or outside width as the rest Shaft 65. The flat, circular segment-shaped surfaces 64 are approximately symmetrical to that axial plane of the device 54, which is related to the axis 10, so that it of the outlet channel 18 are penetrated. The body 52 becomes Assembly in the direction 25 across the axis 51 in the body 53 used. The outer face facing away from the body 52 the bottom wall of the head 12 forms its handle 66 Operation of the discharge device. In the starting position the units 2, 3 are thereby under the force of the spring 39 mutually stated that the body 6 with stops on End of the cap jacket in counter stops at the end of 48 Housing 7 engages. Between the end of the sleeve 53 and the The end 48 of the shaft 65 lies within with its outer circumference the outer shell of the head 12 completely free, so that it can be moved into the housing 7 when actuated can, while the head jacket, the housing 7 on the outer circumference spreads.

3, the outlet axis of the opening 19 is approximately parallel to or in the axis 10 at the extreme end of the Head 12, which is a discharge nozzle for introduction into forms a body opening, for example a nostril. The central shaft formed in one piece with the body 52 65, free from the rest of the unit 11 from the bottom 31 protrudes, delimits the channel 18 only in the area of the channel 23 Completely. A transverse channel leads from channel 23 into groove 18, so that the outlet channel from this cross channel to the entrance the guide 54 from the outer periphery of the unit 52, 65 and is limited by the inner circumference of the head 6, 12. That head points in the extension of the nasal prong and at a distance within its outermost cladding an opposite direction 25 freely protruding, reaching almost to the bottom 31 Inner sleeve, which receives the shaft 65.

The depression 58 of the guide device 54 is shown in FIG. 4 only in the outermost end face of the shaft 52, 65 provided so that the channels 63 the outer periphery of this Connect the shaft to the guide chamber 62. The outer nozzle body is here through the end and end walls of the head and Nose piece formed, against which the handle 66th is set back against direction 25 and on both sides the Axis 10 lies.

5, a single channel 63 connects the end edge of the Body 52 with the chamber 62, the rectilinear channel 63 can be narrowed to chamber 62 in width and / or depth. According to FIGS. 6 and 7, two are separate for the chamber 62 channels 63 connected to the ring channel 59 are provided, which lie on both sides of the chamber 62 and are each angular are. The medium flows from the channel in an angle leg 59 against direction 25 and immediately following Angle leg in the circumferential direction to the chamber 62, this Angle leg of the two channels 63 directed in opposite directions, but with the same directional swirl effect, in the Chamber 62 open.

Each of the described components of the discharge device 1 can be made of plastic, especially by injection molding, be produced, which advantageously in addition to the polymer an admixture not made of plastic, in particular a metal-containing or catalytically active admixture, is provided, namely metallocenes. Only in traces distributed catalyst is used for starting or acceleration the polymerization, which also results in all Molecular chains become about the same length and become a very narrow molecular weight distribution results. The co-catalyst that is in contained transition metal complex or the metal itself can be less than 1/10000000 or 5/10000000 be contained in the plastic, so that the catalyst can remain in the finished component. After the expiry of the The catalyst could also act as a catalyst again be separated from the plastic.

A polyolefin or ethene-containing is preferred as the plastic Plastic, especially polyethylene or a Olefin polymer or olefin copolymer used, so that results in an elastomer. The metallic part of the metallocene can only be titanium or zirconium or a mixture thereof, if it is a Titanocen or Zirkonocen. This results in a particularly good networking with Transition from the monomeric to the polymeric molecular structure or in the chain formation of the molecules. Another improvement can be achieved in that the plastic as a molecular Structure instead of a pure polymer, a co-polymer, e.g. from ethylene and olefin, the weight fraction des-olefin expediently at least 3% and at most 40%, in particular at least 5% and at most 30%. The olefin suitably has two to six carbon atoms.

This training can make a significant improvement of the plastic can be achieved, which is also easy can be recycled. The plastic is very solvent or chemical resistant and has high softening temperatures, with little extractable components. Furthermore the plastic is odorless and tasteless. He has high shock resistance, good or dense surface quality, a slight thermal distortion as well as a very good stress crack resistance.

These properties can be further enhanced by irradiating the fully formed component, in particular by gamma radiation, be improved, the radiation intensity expediently at least 85 kGy and at most 120 kGy, in particular is about 100 kGy. This also enables networking of the molecular chains or the gel portion of the plastic increase. The properties mentioned are special significantly improved compared to plastics, which are manufactured with the usual catalyst systems were, for example with so-called Ziegler-Natta or Phillips catalysts.

Irradiation by an electron beam accelerator o. Like. The respective component for itself or only after Assembly with at least one other component or after ready assembly of all components of the discharge device 1 exposed, so that the radiation very is easy to carry out and has a sterilizing effect. All Components of the device 1 are made of plastic, so that they are recycled together can.

Because of this material in particular a very high one elastic resilience of the component can be achieved, it is preferably suitable for the springs 26, 39, 49, Sealing members 29, 46 or the associated structural units 11, 40, while the other plastic components without admixture can be produced. The respective spring is in accordance with Art a coil spring, but the turns of which are not just close together along the helix slope, but also in one piece transversely to each other via connecting sections are connected, the one compared to the spiral pitch have a steeper slope or along the circumference of the spring the axial connections between adjacent spiral sections form. This allows the spring in the manner of a Bellows to be formed. The support bodies 32, 41, the valve body 21 or 22, the control piston 33, the counter member 36 and the shaft 65 including the outlet body 52 can consist of the refined plastic.

All features can be provided in all embodiments be, which is why all parts of the description are appropriate for everyone Embodiments apply. The specified properties and

Effects can be exactly as described or only approximately or be provided essentially as described.

Claims (11)

1. A medium discharge device comprising a base body (5, 6), a discharge actuator (4) as well as medium spaces containing a pressure chamber (13) and an outlet passage (18) porting into a medium outlet (19), including a closure (20), such as a valve for venting at least part of the medium spaces, said closure (20) defining a closure through-flow direction (25), containing two closure parts, namely a first closure part (21) and a second closure part (22) reciprocatingly translatable against each other in a first and second closure position, such as a closing position and a working position opened by pressure of the medium, and comprising a closure actuator (4) with assigned delay means (30) for delayed release and translation of said closure parts (21, 22) into said first closure position, said delay means (30) comprising a closure holder (34) with holding surface areas (37, 38) retaining said first closure part (21) in said second closure position with a holding force as well as releasing it following a time delay for translation into said first closure position, characterized in that said holding force is determined by friction.
2. The discharge device as set forth in claim 1, characterized in that a actuating force acting against said holding force, such as a spring force or a fluid force is provided, more particularly said holding force being determined by friction between a holding member (35) and a counter member (36) and preferably said counter member (36) sliding on the associated holding surface area (37) to release said first closure part (21) with a reduction in friction.
3. The discharge device as set forth in claim 1 or 2 characterized in that said holding force is determined by movably interaction friction surface areas (37, 38) which define at least one of said medium spaces (13), more particularly said holding force changing in response to a change in position of said closure parts (21, 22) with respect to each other with said closure holder (34) engaged and preferably said holding force diminishing on inflow of medium into said pressure chamber (13).
4. The discharge device as set forth in any of the preceding claims, characterized in that said closure (20) is disposed totally in the interior of said discharge device (1) and is an outlet closure for said outlet passage (18), more particularly said closure (20) being disposed on a displacement unit (11) for changing the volume of said pressure chamber (13) by said discharge actuator (4) with respect to said base body (5) movable via a working stroke and a return stroke and preferably said holding member (35) being disposed on said base body (5), said counter member (36) of said first closure part (21) engaging in said holding member (35) at the end of said working stroke.
5. The discharge device as set forth in any of the preceding claims, characterized in that said holding member (35) of said delay means (30) defines a flow passage adjoining said pressure chamber (13), more particularly said holding member (35) being formed by an inlet port (16) and preferably said holding surface area (37) of said holding member (35) being formed by an inner circumference of said flow passage.
6. The discharge device as set forth in any of the preceding claims, characterized in that the direction of movement of said first closure part (21) from said second closure position into said first closure position corresponds approximately to the closure through-flow direction (25) and/or the direction of said return stroke, more particularly said two closure parts (21, 22) being defined in said first closure position by the one stopping against the other and preferably for translating said first closure part (21) into said second closure position a plunger (33) responding to the pressure in said pressure chamber (13) being provided.
7. The discharge device as set forth in any of the preceding claims, characterized in that said first closure part (21) including a closing surface area (24), a counter member (36) of said delay means (30), a return spring (26) and/or a plunger (33) forms a closing unit (40), more particularly said closing unit (40) being disposed substantially totally within at least one closely surrounding shell (43) such as a housing shell of said base body (5) and preferably said counter member (36) being formed by a freely projecting protuberance located on the side of said first closure part (21) facing away from said closing surface area (24).
8. The discharge device as set forth in any of the preceding claims, characterized in that said first closure part (21) is secured to a carrier body (32) and is movable with respect to said carrier body (32) into said closure positions, more particularly said carrier body (32) being disposed firmly seated on said displacement unit (11) and connected via said return spring (26) to said first closure part (21) and preferably said carrier body (32) adjoining a return spring (39) for said displacement unit (11).
9. The discharge device as set forth in any of the preceding claims, characterized in that a closing unit (40) containing said first closure part (21) is configured integrally, more particularly said closing unit (40) containing said carrier body (32) and/or an actuating spring (39) and preferably said closing unit (40) being configured substantially full-length in the shape of a hollow tube and receiving said holding member (35) in its interior.
10. The discharge device as set forth in any of the preceding claims, characterized in that a holding member (35) of said delay means (30) is defined by a freely protruding tube end of a tubular shell, more particularly a through-opening (50) passing through said tubular shell spaced away from said holding member (35) and preferably said holding member (35) being located in a suction chamber (42) of changing volume which is communicatingly connected via an overflow opening (17) to said pressure chamber (13) surrounding it annularly.
11. The discharge device as set forth in any of the preceding claims, characterized in that said pressure chamber forms the pump chamber (13) of a plunger pump, the displacement unit of which (11) contains a plunger (27) sealingly guided shiftable by a runway surface area of said pump chamber (13), more particularly said dish-shaped plunger (27) comprising a piston shell (28) as well as at the end thereof a transverse wall (31) containing said second closure part (22) and preferably said carrier body (32) engaging the interior of said plunger (27).

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