EP0492354B1 - Dosier- und Spraypumpe zur Abgabe flüssiger, niederviskoser und pastöser Stoffe - Google Patents

Dosier- und Spraypumpe zur Abgabe flüssiger, niederviskoser und pastöser Stoffe Download PDF

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Publication number
EP0492354B1
EP0492354B1 EP91121564A EP91121564A EP0492354B1 EP 0492354 B1 EP0492354 B1 EP 0492354B1 EP 91121564 A EP91121564 A EP 91121564A EP 91121564 A EP91121564 A EP 91121564A EP 0492354 B1 EP0492354 B1 EP 0492354B1
Authority
EP
European Patent Office
Prior art keywords
valve
bellows
wall
dosing
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91121564A
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German (de)
English (en)
French (fr)
Other versions
EP0492354A1 (de
Inventor
Raimund Andris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raimund Andris GmbH and Co KG
Original Assignee
Raimund Andris GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raimund Andris GmbH and Co KG filed Critical Raimund Andris GmbH and Co KG
Publication of EP0492354A1 publication Critical patent/EP0492354A1/de
Application granted granted Critical
Publication of EP0492354B1 publication Critical patent/EP0492354B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/02—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall
    • B05B11/1035—Pumps having a pumping chamber with a deformable wall the pumping chamber being a bellow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1064—Pump inlet and outlet valve elements integrally formed of a deformable material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1077—Springs characterised by a particular shape or material

Definitions

  • the invention relates to a metering and spray pump for dispensing liquid, low-viscosity and pasty substances from bottle or can-like containers, with a bellows made of elastic plastic, which is arranged connecting between two telescopically movable housing parts made of dimensionally stable plastic and as a dispensing valve at one end has a sleeve-like valve ring wall, which surrounds the circumferential surface of a round ring wall formed on the first housing part which carries out the pumping strokes in a sealing manner and which, as an intake valve, also has a sleeve-shaped valve ring wall at its other end, which on the lateral surface of a round valve seat formed on the second housing part sealingly and removably abuts, through which the pumping medium is sucked out of the container into the bellows.
  • valve ring wall sealingly enclosing the cylindrical jacket surface of an attachment forming the valve seat of the dispensing valve is only radially elastic and thus only radial removable.
  • the valve ring walls of the suction valves provided there in different designs can only be lifted elastically in the radial direction from the cylindrical jacket surfaces forming their valve seat, so that the medium drawn in can flow between the relevant jacket surface and the valve ring wall surrounding it into the interior of the bellows.
  • valves The sealing or closing quality of the valves is also crucial for the possibility, especially on the Automatic assembly machines perform a dry function test, in which these valves must prove to be airtight.
  • containers that are equipped with such metering and spray pumps are subjected to drop tests for safety reasons, in which the valves must also prove to close reliably in order to pass.
  • annular sealing lip is arranged for this latter purpose as a radial outward extension of the lowest fold of the bellows at the upper end of an annular collar forming the lower end of the bellows.
  • This ring collar sealingly encloses an annular collar of the housing part connected or connectable to the container. In its rest position, the ring-shaped sealing lip lies sealingly against the cylindrical inside of a ring wall, which is integrally formed on the housing part which can be connected to the bottle neck of a container.
  • this sealing lip is that of a one-way valve, which, on the one hand, pumps air through ventilation openings into the interior of the pump Lets the container flow and this, on the other hand, ensures that nothing of the liquid or pasty container contents can get past the outside of the bellows.
  • the ventilation openings, through which the sucked-in air can flow past the annular sealing lip into the interior of the container, are arranged in an end wall of the housing part which can be connected to the container.
  • this housing part is provided with an internal thread which can be screwed onto a corresponding external thread on the neck of a can-shaped or bottle-shaped container.
  • annular sealing lip inadvertently, for example in the case of a toothpaste tube, due to an intended or unintentional radial pressure on the container wall Locking direction is subjected to a much greater pressure than is normally the case when the container with the dosing pump attached is placed horizontally or upside down.
  • the conventional forms of the annular sealing lip are no longer suitable for providing their blocking effect and for withstanding the increased pressure in the dispensing direction.
  • the invention is therefore based on the object to improve a metering and spray pump of the type mentioned with as few simple, easy to assemble and reliably working individual parts, on which the functional elements can be molded, in such a way that a high level of functional reliability, in particular adequate , verifiable closing quality even in the dry state with low opening force of the discharge and suction valves.
  • the cylindrical valve ring wall of the dispensing valve and the cylindrical valve ring wall of the suction valve which is also provided with a closed end wall, with their open, radially elastic end or peripheral edges each abut conical or spherical shell surfaces of a housing part and - That both valve ring walls are connected to the bellows in a resiliently movable manner in the axial direction, in that the valve ring wall of the dispensing valve has an essentially radially outwardly projecting pressure from the pumping medium in the opening direction actable, elastic ring shoulder is integrally connected to the discharge end of the bellows and in that the valve ring wall of the suction valve is integrally connected to the suction end of the bellows by an axially and radially elastic connecting ring and connecting webs.
  • valve ring wall Due to the simultaneous presence of radial elasticity and axial elasticity, an initially linear contact between the valve ring wall and the conical or dome-shaped lateral surface enclosed by it creates a surface contact during the closing process, in that the edge of the valve ring wall pushes onto the lateral surface in the axial direction, so that any particles in between can be pushed away.
  • the valve ring wall can also adapt easily and better sealing to the shape of the lateral surface even in an inclined position.
  • the opening force of the dispensing valve is additionally reduced by the fact that the pressure prevailing in the medium during the dispensing stroke also acts on the elastic annular shoulder in the axial opening direction.
  • the solution according to claim 2 offers the considerable advantage of integrally molding the valve ring wall and its connecting elements on the bellows.
  • the selected connecting elements also ensure high elasticity and functional flexibility which are advantageous for the desired mode of operation.
  • the embodiment according to claim 3 improves the mode of operation in that the thrust force acting on the bellows during the delivery stroke is kept away from the valve ring wall.
  • the arrangement of claim 4 also serves the advantageous development of the invention in that the sealing of the annular chamber leading to the dispensing mouthpiece, which surrounds the valve ring wall, has no adverse effect on the function of the valve ring wall.
  • the particular advantage that is achieved is that the bellows is displaced in the opening direction by the bellows even during the discharge stroke and only returns to its closed position at the end of the suction stroke.
  • the ring rib so dimensionally stable that it withstands an increased pressure in the opposite direction, ie in the blocking direction, and does not allow any medium to escape past it.
  • the embodiment of the invention according to claim 8 also ensures that when a pressure acting on the outside of the container wall occurs or when a drop occurs, nothing from the container contents can pass through the bellows and the dispensing valve to the dispensing mouthpiece.
  • this security is also not provided because the closing member of the outlet-side outlet valve generally rests on its valve seat surface with only a slight spring pressure, so that only a small force acting in the direction of dispensing is sufficient to open it.
  • Claims 9 to 15 relate to advantageous refinements of the invention which, as will be explained in more detail with reference to the exemplary embodiment described in more detail below, contribute in particular to achieving a compact, simple construction and to simple, functionally reliable handling.
  • the drawing shows a metering and spray pump, which is used to dispense liquid or low-viscosity, in particular pasty, substances from bottle-like or can-like containers, in their usual position of use or handling. It consists of a first upper first housing part 1 and a second lower housing part 2, - the top and bottom of the drawing also corresponding to the normal handling position, - and a bellows 3 arranged between these two housing parts 1 and 2. While the two housing parts 1, 2 are each made of dimensionally stable plastic, the bellows 3 consists of a rubber-like elastic plastic, the elasticity of which, however, is of sufficient dimensional stability and, on the other hand, is able to provide a sufficiently high restoring force for the initial strokes.
  • Both the bellows 3 and the two housing parts 1 and 2 are each made in one piece by injection molding.
  • the housing part 1 is provided with a laterally radially projecting, tubular dispensing mouthpiece 4, the dispensing channel 5 of which opens into an annular chamber 6, which is arranged between an outer cylindrical guide wall 7 and an inner, conically tapering annular wall 8 and through an end wall connecting these two 9 is closed at the top.
  • On this end wall 9 is fitted with a snap or snap connection 10 provided with a snap cap 10 which closes the upper end of the inner ring wall 8.
  • the bellows 3 is provided at the end of its uppermost annular fold 3/1 with an outer sealing ring 12, which rests sealingly on the inner surface of this guide wall 7 directly above a thin rib 13 which runs around the inside of the guide wall 7.
  • an outer sealing ring 12 Above the outer sealing ring 12, a radially outwardly projecting thin-walled and therefore axially elastic ring shoulder 14 is arranged at a small axial distance therefrom, via which an essentially cylindrical and radially elastic valve ring wall 15 is integrally formed with the bellows 3 or with the sealing ring 12 connected is.
  • This valve ring wall 15 lies with its upper end edge 16 with a certain both axially and radially effective prestress sealingly against the conical outer surface 17 of the inner ring wall 8 and forms on the one hand in cooperation with this inner ring wall 8 forms the movable closing member of a dispensing valve 18 and on the other hand forms the Partition between the annular chamber 6 and the interior 19 of the bellows 3.
  • the interior 19 of the bellows 3 is largely filled by a hollow cylindrical displacement body 16, which is stepped several times in diameter, which is integrally formed as an extension on the inner ring wall 8 of the housing part 1 and has a radial distance over its entire length from the wall of the bellows 3 has, so that the medium to be dispensed can flow between the displacement body 20 and the wall of the bellows 3.
  • the displacement body 20 Only in the area of the uppermost inner annular fold 3/2 of the bellows 3 is the displacement body 20 provided with a plurality of support cams 21 arranged distributed around its circumference, which are axially supported on an inner radial shoulder 22 of this annular fold 3/2. These support cams 21 have the task of keeping the effective pump pressure in the direction of arrow 67 at the output stroke of the housing part 1 from the upper section of the bellows 3, but in particular from the valve ring wall 15 and the ring shoulder 14, so that their function is not impaired.
  • the displacement body 20 At its lower end, has a conically widening edge section 23, which is closed by an end wall 25 which is offset axially upwards relative to the edge 24.
  • This displacement body 20 is provided with a smaller diameter than the ring wall 8 insofar as it projects as an extension of the conical ring wall 8 into the bellows 3.
  • the guide wall 7 of the housing part 1 is provided at its lower end with an inwardly projecting ring collar 26, which engages positively under an outwardly projecting ring collar 27 of a guide wall 28 of the housing part 2 so that the two guide walls 7 and 28 are telescopically guided into one another and one enable telescopic axial relative movement against each other, which corresponds to a pump stroke.
  • This axial relative movement is limited by axial stops which are formed in one direction by the two ring collars 26 and 27 and in the other direction by an annular shoulder 29 of the housing 2, on which the collar 26 of the housing part 1 is seated at the end of the pump stroke.
  • the annular collar 27 of the housing part 2 is provided at the top with a collar 30 tapering in diameter with respect to the rib 13 of the guide wall 7, through which collar 30 the assembly of the sealing ring 12 is pushed from below over the rib 13.
  • the task of the rib 13 is to hold the sealing ring 12 in the position shown in the drawing.
  • the diameter of the ring collars 26, 27 and the diameter of the guide walls 7, 28 are so matched to one another that, on the one hand, adequate guidance between the two housing parts 1 and 2 is ensured, but on the other hand, at the respective contact points, there is sufficient air exchange between the surroundings and the common housing interior 31 can take place during the lifting movements.
  • the guide wall 28, which surrounds the bellows 3 with a small radial distance, has a diameter widening 33 below the rest position shown in FIGS.
  • the guide wall 28 is integrally formed on an annular web 37 of the housing part 2 like all other components, except for the dispensing mouthpiece 4, concentrically to the common axis 32.
  • a screw-on cap 39 which is provided with an internal thread 38, is formed on the opposite axial side thereof, through which the entire metering and spray pump can be screwed onto the thread neck, not shown, of a can- or bottle-like paste or liquid container.
  • a cylindrical pot body 40 is integrally formed on the ring web 37 inside the screw-on cap 39, the end wall 41 of which has a central, nipple-like, upwardly directed hollow body 42 with a suction bore 45 and with a spherical surface 43 serving as a valve seat and which has a downward intake manifold 44 is provided.
  • the latter can be provided with a suction hose, not shown, for sucking in a liquid medium.
  • Containers with pasty substances are usually provided with a trailing piston.
  • a cylinder wall 46 which is integrally connected to the bellows 3 and is integrally formed on the upper end of which a radially inwardly projecting annular collar 47 and the annular folds of the bellows are integrally formed.
  • the already mentioned ring rib 34 has the task, during the suction stroke of the bellows 3, that is, when the bellows 3 returns from the pump stroke end position shown in FIG. 2 in the direction of arrow 48 to the rest position shown in FIG. 1, from which the bellows 3 surrounding interior 31, which is also connected to the outside atmosphere by the non-airtight connection between the two guide walls 7 and 28, to allow air to pass through ventilation openings 49 of the ring land 37 and through them into the interior of the screw cap 39 or into the container , on which the screw cap 39 is screwed.
  • this annular rib 34 also has the task of preventing the liquid or pasty medium in the container from being able to get into the interior 31 if the container takes a horizontal position instead of the normal vertical position, for example falls over, or if the Container is provided with a deformable wall and on this from the outside Pressure is exerted. It therefore has the task of sealingly separating the storage space 36, which is constantly connected to the container through the ventilation openings 49, from the interior 31.
  • the annular rib 34 thus forms, in cooperation with the inner surface of the guide wall 28, a ventilation valve which is open during the lifting movements of the first housing part 1 and closed in the rest position and which has the property of withstanding a relatively large pressure in the blocking direction and suction air in the suction direction during the suction stroke of the bellows let through without creating a vacuum inside the container that would be sufficient to deform thin and easily deformable container walls inwards.
  • the cylinder wall 46 of the bellows 3 has a reinforced front edge 50 seated on the bottom wall 41 of the pot body 40, on which a first group of three finger-like connecting webs 51, which are directed axially upwards and are offset by 120 ° to one another in the circumferential direction, are formed.
  • the upper ends of these connecting webs 51 are integrally connected to a both radially and axially elastic connecting ring 52, which in turn is attached by a second group of connecting webs 53, which run essentially radially and are each offset by 60 ° with respect to the connecting webs 51
  • cylindrical valve ring wall 54 is connected and is provided at its upper end with an end wall 57 closing its cavity 56.
  • the valve ring wall 54 is thin-walled, and it sits with its lower, open edge 55 radially resiliently and sealingly on the spherical surface 43 of the hollow body 42.
  • the inner diameter of the valve ring wall 54 is approximately twice as large as the diameter of the suction bore 45 but only slightly smaller than the outer diameter of the hollow body 42. Due to the radial and axial elasticity of the connecting ring 52, the valve ring wall 54 can always seal against the lateral surface 43 even if it is inaccurate or in an inclined position, even if this were conical instead of dome-shaped. This elasticity or spring property of the connecting ring 52 also ensures that the valve ring wall 54 automatically returns to its closed position after a completed suction stroke.
  • the lateral surface 43 of the hollow body 42 and the valve ring wall 54 thus form the suction valve 58 of the metering and spray pump, while the valve ring wall 15 forms the dispensing valve 18 in cooperation with the inner ring wall 8 of the upper housing part 1.
  • valve ring wall 54 While in the preferred embodiment described above the valve ring wall 54, the connecting webs 51, 53 and the connecting ring 52 are integrally formed on the lower end edge 50 of the bellows 3, it is also possible to provide the outer connecting webs 51 with a further, preferably more stable ring, which is inserted into a corresponding receptacle of the front edge 50.
  • the valve ring wall 54 could thus be produced together with the connecting webs 51, 53, the connecting ring 52 and the additional ring as a separate component.
  • the material elasticity of the bellows 3 also brings about an automatic return of the first housing part 1 to its extended rest position as soon as no more axial force is exerted on it, i.e. when it is released after an output stroke in the direction of arrow 67.
  • This return movement in the direction of arrow 48 is the suction stroke, during which the valve ring wall 54 is lifted axially resiliently from the lateral surface 43 so that medium can flow out of the container into the interior 60 of the cylinder wall 46 and the annular folds of the bellows 3.
  • both the suction valve 58 and the discharge valve 18 occur when a in the direction of arrow 48, i.e. open in the output direction of effective pressure and this pressure can also arise from the fact that thin deformable walls of the container, on which the metering and spray pump is placed, are pressed together, there is a risk in such thin-walled or provided with deformable walls containers that through the mentioned pressing pressure, which deforms the container walls, uncontrolled medium is pressed out through the metering and spray pump. The same can also happen if a container provided with such a metering and spray pump falls headfirst on a hard surface.
  • the intake valve 58 in the form of the annular collar 47 and the conical lower edge section 23 of the displacement body 20 is followed by a check valve 59, through which the interior 60 of the cylinder wall 46 from the interior 19 of the annular folds of the bellows 3 is sealed off as long as the upper housing part 1 is in its upper end position, which is shown in FIGS. 1 and 2.
  • a check valve 59 through which the interior 60 of the cylinder wall 46 from the interior 19 of the annular folds of the bellows 3 is sealed off as long as the upper housing part 1 is in its upper end position, which is shown in FIGS. 1 and 2.
  • the conical outer surface of the edge section 23 is in sealing contact with the collar 23.
  • valve ring wall 15 is formed on the outer edge of the likewise thin-walled and therefore elastic in the axial direction annular shoulder 14, it is also able to perform axial movements relative to the lateral surface 17 of the ring wall 8, so that the opening and closing processes can be carried out more easily and quickly. However, it is also important that the pressure that builds up in the medium during the discharge stroke has an effect on the radial annular shoulder 14 in the opening direction, and thus the discharge valve 18 opens faster.
  • the displacement body 20 therefore not only has the task of keeping the interior 19 of the bellows 3 as small as possible in the area of the annular folds, but it also serves as a check valve when it has reached its upper end position.
  • the part of the edge section 23 which extends below the annular collar 47 is widened to a diameter which corresponds at least approximately to the inside diameter of the cylinder wall 46.
  • the part of the edge section 23 which extends in the rest position below the annular collar 47 is provided on its periphery with a plurality of slot-shaped recesses 62 which but end on a diameter that is smaller than the inner diameter of the collar 47 so that the check valve effect is maintained.
  • this leading edge section 23 is offset axially by the stroke length from the likewise leading collar 26 of the guide wall 7, the two housing parts 1, 2 are also guided into one another so well in the rest position (FIG. 1) that no obstructions for the axial stroke movement can occur without additional guide surfaces on the two housing parts 1 and 2 overlapping in the axial direction over a longer distance being required.
  • a metering and spray pump for liquid and low-viscosity or pasty substances is created, which guarantees a trouble-free pumping function with relatively wide manufacturing tolerances and can also be used advantageously in thin-walled, easily deformable bottle- or can-like containers which ensures that the container walls are not deformed when handled correctly and that uncontrolled pressing out or outflow of medium from the container through the metering and spray pump is prevented by improper application of a pressing pressure on a flexible container wall.
  • the metering and spray pump according to the invention can also be used universally both for liquid and for pasty media. The initial suction of medium from a container takes place safely after only a few pumping strokes, and a dry function check of the entire pump is possible.
  • valves 18, 58 in which the container of the medium is formed directly on the housing part 2 instead of having a threaded cap 39.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
EP91121564A 1990-12-21 1991-12-17 Dosier- und Spraypumpe zur Abgabe flüssiger, niederviskoser und pastöser Stoffe Expired - Lifetime EP0492354B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041136A DE4041136C2 (de) 1990-12-21 1990-12-21 Dosier- und Spraypumpe zur Abgabe flüssiger, niederviskoser und pastöser Stoffe
DE4041136 1990-12-21

Publications (2)

Publication Number Publication Date
EP0492354A1 EP0492354A1 (de) 1992-07-01
EP0492354B1 true EP0492354B1 (de) 1994-09-14

Family

ID=6420999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121564A Expired - Lifetime EP0492354B1 (de) 1990-12-21 1991-12-17 Dosier- und Spraypumpe zur Abgabe flüssiger, niederviskoser und pastöser Stoffe

Country Status (16)

Country Link
US (1) US5238156A (ja)
EP (1) EP0492354B1 (ja)
JP (1) JP3188497B2 (ja)
KR (1) KR920012744A (ja)
CN (1) CN1064732A (ja)
BR (1) BR9105494A (ja)
CA (1) CA2058374A1 (ja)
CS (1) CS396091A3 (ja)
DE (1) DE4041136C2 (ja)
ES (1) ES2059024T3 (ja)
FI (1) FI916025A (ja)
HU (1) HUT61829A (ja)
MX (1) MX9102658A (ja)
NO (1) NO914623L (ja)
PL (1) PL292816A1 (ja)
ZA (1) ZA919877B (ja)

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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DE4041136A1 (de) 1992-07-02
JPH04269386A (ja) 1992-09-25
HUT61829A (en) 1993-03-01
CA2058374A1 (en) 1992-06-22
FI916025A (fi) 1992-06-22
JP3188497B2 (ja) 2001-07-16
MX9102658A (es) 1992-06-01
DE4041136C2 (de) 1994-06-30
FI916025A0 (fi) 1991-12-19
BR9105494A (pt) 1992-09-01
ES2059024T3 (es) 1994-11-01
US5238156A (en) 1993-08-24
CN1064732A (zh) 1992-09-23
ZA919877B (en) 1992-09-30
PL292816A1 (en) 1992-07-13
EP0492354A1 (de) 1992-07-01
CS396091A3 (en) 1992-08-12
HU913798D0 (en) 1992-02-28
NO914623L (no) 1992-06-22
NO914623D0 (no) 1991-11-26
KR920012744A (ko) 1992-07-27

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