EP0289856A2 - Distributeur de fluide - Google Patents

Distributeur de fluide Download PDF

Info

Publication number
EP0289856A2
EP0289856A2 EP88106259A EP88106259A EP0289856A2 EP 0289856 A2 EP0289856 A2 EP 0289856A2 EP 88106259 A EP88106259 A EP 88106259A EP 88106259 A EP88106259 A EP 88106259A EP 0289856 A2 EP0289856 A2 EP 0289856A2
Authority
EP
European Patent Office
Prior art keywords
piston
pump
discharge device
cylinder
valve
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.)
Granted
Application number
EP88106259A
Other languages
German (de)
English (en)
Other versions
EP0289856A3 (en
EP0289856B1 (fr
Inventor
Karl-Heinz Fuchs
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.)
Aptar Radolfzell GmbH
Original Assignee
Erich Pfeiffer GmbH
Ing Erich Pfeiffer GmbH
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 Erich Pfeiffer GmbH, Ing Erich Pfeiffer GmbH filed Critical Erich Pfeiffer GmbH
Priority to AT88106259T priority Critical patent/ATE77975T1/de
Publication of EP0289856A2 publication Critical patent/EP0289856A2/fr
Publication of EP0289856A3 publication Critical patent/EP0289856A3/de
Application granted granted Critical
Publication of EP0289856B1 publication Critical patent/EP0289856B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
    • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke
    • 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

Definitions

  • the invention relates to a discharge device according to the preamble of patent claim 1.
  • the invention has for its object to provide a discharge device of the type mentioned, which allows an advantageous valve control with a simple structure, safe function and simple assembly.
  • the thrust piston pump expediently has a cylinder housing with a pump piston of a piston unit which can be moved in a cylinder along a cylinder track via a pump stroke from an initial position to an end-of-stroke position with a piston shaft and which delimits a pump chamber in the cylinder, to which a pump chamber is discharged Outlet opening leading outlet channel is connected via an outlet valve, wherein an auxiliary piston is provided for opening the outlet valve, which is guided in a control cylinder exposed to the pressure in the pump chamber.
  • the auxiliary piston and the control cylinder can preferably lie within the piston unit.
  • valve part of the exhaust valve which is movable against spring force, for example, can be displaceably supported only opposite and on the piston unit without being directly influenced by the position of the pump piston.
  • the movable valve part can also be moved relatively long-stroke as intended, for example, over a stroke that is several times larger than the diameter of the auxiliary piston, without additional height of the discharge device being required for this purpose.
  • the piston unit in particular the piston shaft, directly forms the control cylinder
  • the auxiliary piston preferably parallel to the Pump piston is slidably mounted in the piston unit. Due to the design according to the invention, the auxiliary piston can have a significantly smaller diameter than the pump piston. Furthermore, the opening movement of the auxiliary piston can be opposite to the pumping stroke movement of the pump piston, as a result of which an extremely simple direct line connection between the pump chamber and the auxiliary piston is possible.
  • control cylinder is provided in a section of the piston skirt which is expanded in terms of the inner width compared to the section adjoining the outlet opening or has the same outer cross-sections as this section, so that despite the smooth cylindrical piston shaft on the outside thereof an extended control cylinder with end shoulders to support a return spring is created.
  • the auxiliary piston is inserted from the front end of the pump piston into the control cylinder, which is preferably closed at the associated end with a cylinder cover inserted into the cuff-shaped pump piston except for a connecting channel to the pump chamber. This provides a simple stop for the end position of the auxiliary piston associated with the closed position.
  • a particularly advantageous embodiment in particular a discharge device of the type described, consists in that a movably mounted valve closing part of the exhaust valve is formed directly by an annular piston lip of the auxiliary piston, so that a separate valve closing part is not necessary.
  • the valve closing part or the piston lip is designed so that it is in the open position releases a passage for the medium between itself and the associated cylinder wall, which therefore flows past the auxiliary piston in the open position on the outside.
  • At least one longitudinal channel is provided in the longitudinal section of the control cylinder associated with the opening position of the auxiliary piston in its cylinder wall, which is preferably laterally delimited by a longitudinal rib projecting inwards over the cylinder raceway, which thus defines the piston lip presses radially inwards that on both sides of the longitudinal rib there are created transition openings which close again immediately when the piston lip reaches a longitudinal section of the control cylinder without a longitudinal channel.
  • the longitudinal channels can be offset from the position of the auxiliary piston associated with the closed position so that the auxiliary piston must first be moved over a forward distance without opening the exhaust valve until it reaches an open position when sufficient pressure is reached in the pump chamber.
  • the exhaust valve does not open with the first movement of the auxiliary piston, but it is already under the conditions of sliding friction before the exhaust valve opens.
  • the auxiliary piston can be securely guided in the piston unit with at least one slide rod adjoining at least one piston side, preferably a slide rod passing through the pump piston penetrating the passage for the medium.
  • the discharge device 1 has a thrust piston pump 2 lying in a pump axis with a cylinder housing 3 which is reduced in diameter several times.
  • the lower section of the furthest part of the cylinder housing 3 forms a cylinder 4 and on the inside a piston track 5 for the pump piston 7 of a piston unit 6, which is displaceably mounted parallel to the pump axis between two stop positions.
  • the cuff or Cup-shaped pump piston 7, which points with its cup opening in the direction of the pump stroke, is connected to a piston shaft 8, which connects in one piece to a rear, annular cup end wall of the pump piston 7 and passes in one piece to an actuating head 9.
  • the actuating head 9 is plugged onto the associated end of the piston skirt 8 with a reduced outer diameter.
  • the pump piston 7 delimits a pump chamber 10 within the cylinder 4 and is penetrated by an outlet channel 11 connected to this pump chamber 10, which leads through the entire piston shaft 8 and is connected to an outlet opening 12 in the actuating head 9.
  • the outlet channel 11 can be closed within the piston unit 6 or the pump piston 7 with an outlet valve 13 lying in the pump axis, which has an auxiliary piston 14 formed in one piece with the movable valve closing part 16 and a control cylinder 15 for guiding it, which is integral with the piston shaft 8 formed, that is formed by a longitudinal portion of this piston skirt 8, passes through the end wall of the pump piston 7 and extends to the front or inner end face of this end wall with a substantially constant diameter.
  • the tapered end of the pump chamber 10 opposite the pump piston 7 merges into an inlet channel 18 which is connected to the pump chamber 10 with the interposition of an inlet valve 19 designed as a ball check valve.
  • the rear end of the cylinder housing 3, which is adjacent to the actuating head 9, is formed in one piece with an annular flange 20 protruding over its outer circumference, which, via a snap connection, receives a cylinder cover 21 penetrated by the piston skirt 8 and with its rear end face rests against an inner shoulder of a cap 22, which does so Cylinder housing 3 surrounds with a cap jacket and is provided with a thread for attachment to the neck of a storage vessel, for example in the cap jacket.
  • the cap 22 has a collar jacket, in which the actuating head 9 engages in any position.
  • the inner shoulder of the cap 22 formed by an annular wall is also penetrated by the piston skirt 8. Due to the direct support of the cylinder housing 3 by means of the ring flange 20 on the end face of the neck of the vessel, the cylinder housing 3 cannot come loose from the neck of the vessel and fall into the vessel. Furthermore, the system on the ring wall allows the cylinder cover 21 to be pressed into its fastening position in the ring flange 20 in addition to the snap connection.
  • the piston 7 has at its front end an annular main sealing lip 23 which is guided on the piston raceway 5 and which is opposite an annular stop shoulder 25 in the cylinder 4 and against which the associated open end face of the pump piston 7 strikes in the stroke end position.
  • the pumping piston 7 has at the rear end a ring-shaped support sealing lip 24 which is flared to the rear and is provided approximately in the axial region of the auxiliary piston 14 in the closed position or slightly behind or behind the end wall of the pumping piston 7.
  • a cover sleeve 26 is inserted on the inside of its end wall, which extends approximately to the main sealing lip 23 and in which a return spring 27, which is designed as a helical compression spring and is located in the pump chamber 10, is supported with one end, whereby the other end of this return spring 27 lies directly adjacent to the inlet valve 19 on an inner shoulder of the cylinder housing 3.
  • the piston unit 6 lies against the inner end of a sleeve extension of the cylinder cover 21 protruding into the cylinder housing 3 with a frustoconical circumferential section which forms a transition section between the outer circumference of the piston skirt 8 and the end wall of the pump piston 7 and within the support Sealing lip 24 is located.
  • the cylinder housing 3 Adjacent to the outer circumference of the sleeve extension of the cylinder cover 21, the cylinder housing 3 has openings as ventilation openings for the vessel, through which openings external air can flow into the vessel through the annular gap between the piston skirt 8 and the cylinder cover 21.
  • This ventilation connection is closed valve-like in the initial position of the piston unit 6 by the described abutment of the pump piston 7 on the cylinder cover 21.
  • the sleeve has on the inner circumferential surface Approach of the cylinder cover 21 on the circumference evenly distributed, axial guide ribs 28 which on the outer end face of an annular disk 20 engaging in the annular flange 20 of the cylinder cover 21 continuously pass approximately radial ribs.
  • the guide ribs 28 guide the piston skirt 8 with their longitudinal edges in the area of limited strip zones, while the radial ribs rest on the ring wall of the cap 22 or on the inner shoulder thereof, so that the cylinder cover 21 is clamped between this ring wall and the ring flange especially when the cap 22 has been screwed onto a vessel.
  • the guide ribs 28 end at a short distance from the inner end of the sleeve extension of the cylinder cover 21, so that this end forms an annularly closed valve seat for the ventilation valve described.
  • the control cylinder 15, which is longer compared to the pump stroke of the piston unit 6, has a raceway 29 for the auxiliary piston 14 which is enlarged in terms of the inside diameter in relation to the adjacent section of the outlet channel 11 in such a way that the piston shaft 8 in the area of the cylinder 15 is substantially thinner than in the other areas.
  • the auxiliary piston 14 is provided as an annular extension on the outer circumference of a plunger-shaped slide rod 30 which projects approximately equally far over both end faces of the auxiliary piston 14, so that a front and a rear slide rod section are formed, both slide rod sections having approximately the same outer cross sections.
  • the rear, completely within the piston shaft 8 slide rod section passes through the control cylinder 15 over its entire length and protrudes with an end section in the subsequent, narrowed section of the outlet channel 11 with so much play that an annular gap remains free for the passage of the medium.
  • the front slide rod section passes through the pump piston 7 or a central opening in the end wall of the likewise cup-shaped cover sleeve 26, this slide rod section freely into the Pump chamber 10 protrudes.
  • An annular gap is left free between the central opening and the outer periphery of the front slide rod section, so that a transition 31 is created, via which the pump chamber 10 is permanently connected to the pressure chamber of the control cylinder 15.
  • the auxiliary piston 14 forms a frustoconically shaped sealing lip 32 directed in cross section against the pump chamber 10, which rests on the raceway of the control cylinder 15 with an edge which defines its free end face on the outer circumference and is pressed more strongly against the raceway, the higher the pressure in the Pressure room is.
  • the free end face of the sealing lip 32 also lies sealingly against the associated end face of the end wall of the cover sleeve 26 and for limiting the stop of the valve closing part 16 in the closed position.
  • valve spring 33 on the auxiliary piston 14 which is formed by a prestressed helical compression spring which closely surrounds the associated slide rod section and whose other end is supported on the associated end shoulder of the control cylinder 15.
  • auxiliary piston 14 Provided on the raceway 29 for the auxiliary piston 14 are a plurality of axial longitudinal ribs 34 which are evenly distributed over the circumference and which, in cross-section, project inwards over the raceway and whose ends 35 which face the auxiliary piston 14 in the closed position are at a certain distance from the auxiliary piston 14 or from the piston lip 32. These ends 35 run in the manner of inclined ramps at a flat angle, so that the sealing lip 32 can run onto the longitudinal ribs 34 without the risk of damage. As soon as the sealing lip 32 has reached the region of the longitudinal ribs 34, it is indented by each longitudinal rib 34 in accordance with FIG.
  • control cylinder 15 which is drawn out from the socket formed by the guide rib 28 in the stroke-end position of the pump piston, is designed to be elastically bulged under a certain compression pressure and to be slightly elastically bulged and by the associated end of the raceway 29 and by the end face of the cover sleeve 26 formed valve seat 17 is deformed so that compressed air can pass through the outlet valve 13.
  • the pump chamber 10 which has not yet been filled with liquid, could be vented particularly simply and quickly.
  • the auxiliary piston 14 or the valve closing part 16 can be inserted with the valve spring 33 in a simple manner through the pump piston 7 into the control cylinder 15 and secured by pressing the cover sleeve 26 into the pump piston 7.
  • the piston unit 6 then forms with the outlet valve 13 a self-contained structural unit 37 which can be inserted into the cylinder housing 3 from the rear end.
  • the cylinder cover 21 can already be combined with this structural unit 37.

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Nozzles (AREA)
  • Coating Apparatus (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
EP88106259A 1987-05-08 1988-04-20 Distributeur de fluide Expired - Lifetime EP0289856B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106259T ATE77975T1 (de) 1987-05-08 1988-04-20 Austragvorrichtung fuer medien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3715299 1987-05-08
DE19873715299 DE3715299A1 (de) 1987-05-08 1987-05-08 Austragvorrichtung fuer medien

Publications (3)

Publication Number Publication Date
EP0289856A2 true EP0289856A2 (fr) 1988-11-09
EP0289856A3 EP0289856A3 (en) 1989-08-30
EP0289856B1 EP0289856B1 (fr) 1992-07-08

Family

ID=6327065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106259A Expired - Lifetime EP0289856B1 (fr) 1987-05-08 1988-04-20 Distributeur de fluide

Country Status (3)

Country Link
EP (1) EP0289856B1 (fr)
AT (1) ATE77975T1 (fr)
DE (2) DE3715299A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388651A2 (fr) * 1989-03-18 1990-09-26 Ing. Erich Pfeiffer GmbH Dispositif pour décharger un fluide
US4986453A (en) * 1989-05-15 1991-01-22 The Pittway Corporation Atomizing pump
EP0688608A1 (fr) * 1994-03-25 1995-12-27 GUALA S.p.A. Dispositif de pulvérisation pour des pompes actionnées à la main
WO1996040332A1 (fr) * 1995-06-07 1996-12-19 O'neil, Christine Dispositif d'administration de medicament, commande par le patient
US5655688A (en) * 1994-10-19 1997-08-12 Aptargroup, Inc. Atomizing pump with high stroke speed enhancement and valve system therefor
EP0795354A2 (fr) * 1996-03-11 1997-09-17 Calmar Inc. Pulvérisateur à pompe à précompression
US6056727A (en) * 1991-07-01 2000-05-02 O'neil; Alexander George Brian Apparatus for patient-controlled infusion
EP1033174A2 (fr) 1999-03-03 2000-09-06 Microspray Delta S.p.A. Pompe manuelle pour délivrer des liquides sous pression
US7335186B2 (en) 1998-03-13 2008-02-26 Alexander George Brian O'Neil Patient controlled drug delivery device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832852A1 (de) * 1988-09-28 1990-03-29 Oeco Tech Entwicklung & Vertri Automatische spruehdose
DE4035619A1 (de) * 1990-11-09 1992-05-14 Pfeiffer Erich Gmbh & Co Kg Austragvorrichtung fuer medien

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346056A1 (fr) * 1975-07-11 1977-10-28 Step Soc Tech Pulverisation Perfectionnements apportes aux vaporisateurs
GB2013774A (en) * 1978-02-01 1979-08-15 Canyon Corp Manually operated sprayer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346056A1 (fr) * 1975-07-11 1977-10-28 Step Soc Tech Pulverisation Perfectionnements apportes aux vaporisateurs
GB2013774A (en) * 1978-02-01 1979-08-15 Canyon Corp Manually operated sprayer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388651A3 (fr) * 1989-03-18 1991-05-29 Ing. Erich Pfeiffer GmbH Dispositif pour décharger un fluide
EP0388651A2 (fr) * 1989-03-18 1990-09-26 Ing. Erich Pfeiffer GmbH Dispositif pour décharger un fluide
US4986453A (en) * 1989-05-15 1991-01-22 The Pittway Corporation Atomizing pump
US6056727A (en) * 1991-07-01 2000-05-02 O'neil; Alexander George Brian Apparatus for patient-controlled infusion
US5657930A (en) * 1994-03-25 1997-08-19 Battegazzore; Piero Atomizer device for manually operated pumps
EP0688608A1 (fr) * 1994-03-25 1995-12-27 GUALA S.p.A. Dispositif de pulvérisation pour des pompes actionnées à la main
AU677105B2 (en) * 1994-03-25 1997-04-10 Guala S.P.A. An atomizer device for manually operated pumps
US5655688A (en) * 1994-10-19 1997-08-12 Aptargroup, Inc. Atomizing pump with high stroke speed enhancement and valve system therefor
WO1996040332A1 (fr) * 1995-06-07 1996-12-19 O'neil, Christine Dispositif d'administration de medicament, commande par le patient
US6605060B1 (en) 1995-06-07 2003-08-12 O'neil Alexander George Brian Patient controlled drug delivery device
EP0795354A2 (fr) * 1996-03-11 1997-09-17 Calmar Inc. Pulvérisateur à pompe à précompression
EP0795354A3 (fr) * 1996-03-11 1998-06-10 Calmar Inc. Pulvérisateur à pompe à précompression
US7335186B2 (en) 1998-03-13 2008-02-26 Alexander George Brian O'Neil Patient controlled drug delivery device
EP1033174A2 (fr) 1999-03-03 2000-09-06 Microspray Delta S.p.A. Pompe manuelle pour délivrer des liquides sous pression

Also Published As

Publication number Publication date
DE3715299A1 (de) 1988-11-24
EP0289856A3 (en) 1989-08-30
ATE77975T1 (de) 1992-07-15
DE3872585D1 (de) 1992-08-13
EP0289856B1 (fr) 1992-07-08

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