EP0466544A1 - Dosierpumpe für Druckspritzen mit intrinsischer Sicherheit - Google Patents

Dosierpumpe für Druckspritzen mit intrinsischer Sicherheit Download PDF

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Publication number
EP0466544A1
EP0466544A1 EP91401716A EP91401716A EP0466544A1 EP 0466544 A1 EP0466544 A1 EP 0466544A1 EP 91401716 A EP91401716 A EP 91401716A EP 91401716 A EP91401716 A EP 91401716A EP 0466544 A1 EP0466544 A1 EP 0466544A1
Authority
EP
European Patent Office
Prior art keywords
container
pump
pressure
pump body
piston
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
EP91401716A
Other languages
English (en)
French (fr)
Other versions
EP0466544B1 (de
Inventor
Jean-Pierre Lina
Hervé Pacaud
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 France SAS
Original Assignee
Valois SAS
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 Valois SAS filed Critical Valois SAS
Publication of EP0466544A1 publication Critical patent/EP0466544A1/de
Application granted granted Critical
Publication of EP0466544B1 publication Critical patent/EP0466544B1/de
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
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve

Definitions

  • the present invention relates to a spray metering pump operating only when mounted on a pressure vessel.
  • the corresponding container contains, in addition to the liquid to be sprayed, a gas capable of expanding as the container becomes empty and thus of maintaining the internal pressure at a level higher than atmospheric pressure.
  • This gas can be dissolved in the liquid such as freon or not dissolved such as nitrogen.
  • freon or not dissolved such as nitrogen.
  • the resulting sprayer is especially interesting in the pharmacy field. Certain preparations oxidize in effect in air or can be contaminated by germs present in the atmosphere. They then lose their medicinal properties, even become toxic.
  • a spray metering pump adapted to be mounted on a pressure vessel is known in the prior art. It is described in more detail below with reference to the single figure. Various variants can also be found in French patent application 2,620,052 filed in 1987 by the company VALOIS. For the time being, we will limit our to specifying that nothing prevents this pump from operating when the container is at atmospheric pressure. In other words, in the case of a gas leak out of the container and the introduction of a little air instead, there is the risk of administering an improper liquid.
  • Said predetermined pressure is for example chosen between 1 and 2 bars above atmospheric pressure.
  • said spring preferably has a stiffness the lower the greater the said predetermined pressure.
  • a crimping flange 2 generally made of deformable metal, to adapt tightly thanks to a seal 21 at the neck a container (not shown), the latter containing the reserve of liquid to be sprayed as well as a certain quantity of gas under pressure, a nozzle 3 held by a shoulder 22 of the collar 2 retaining a washer 23 for intermediate sealing, a pump body 4 formed externally by a cylinder 41, one open end 42 of which receives the end piece 3 by force, an annular sealing bead 24 ensuring its watertight fixing, and the other end of which ends with a sleeve 47 capable of receiving a dip tube 1 extending approximately to the bottom of the container, a hollow piston 5, a base 51 of which abuts the end piece 3, but can slide in leaktight manner inside of the pump body 4 by virtue of two peripheral lips and which extends outside the pump body 4 into a hollow, narrower rod 52, adapted to be
  • the pump body 4 also encloses a second piston 6 whose shape is very specific. At one of its ends, a needle 61 ending in a cone 62 with the leveled point in a small cup 70 engages inside the rod 52 of the hollow piston 5 and abuts against an internal narrowing 53 of the rod 52.
  • the other end of the piston 6 is constituted by a cylindrical skirt 63 provided externally with fins 66 for guiding along the internal wall of the cylinder 41. Inside the skirt 63, the piston 6 has a finger 64 centered on the axis 00 of revolution of the pump. This finger 64 projects so that a cylindrical spring 7 can engage thereon at one of its ends to bear against it while remaining coaxial with the whole of the metering pump. In the embodiment shown in the figure, the other end of the spring 7 bears on the bottom of the pump body 4 opposite its open end 42. Two hollow cylinders 43 and 44 internally extend the pump body 4 while the spring 7 is partly housed therebetween.
  • the various elements 1 to 7 which have just been mentioned, are arranged with respect to each other as shown in the figure which therefore corresponds to the rest position of the pump.
  • the pump chamber 45 which is essentially determined by the annular space located between the cylinders 41 and 44 of the pump body 4, communicates with the container via the plunger tube 1.
  • the respective lengths of the skirt 63 and the open cylinder 44 are chosen so that there is an annular passage 46 between these two elements.
  • the chamber 45 is at the pressure Po prevailing in the container. The latter generally varies between 2 and 6 bars depending on the amount of gas present.
  • the open cylinder 44 has recesses 49 at its free edge. These recesses 49 may, depending on the case, be simple grooves made as shown on the outer surface of the open cylinder 44 or even consist of cutouts of its wall (not shown).
  • the pump chamber 45 remains in communication with the container through the recesses 49 and this despite the presence of a sealing lip at the free end 67 of the skirt 63. It is only when this lip arrives at the full level of the open cylinder 44 that the pump chamber 45 is isolated both from the ambient air and from the container .
  • the open cylinder 44 is devoid of recesses, comparable insulation is achieved from the start of the fitting of the skirt 63 around it.
  • the volume of the chamber 45 begins to decrease while the fitting of the skirt 63 on the open cylinder 44 continues. This results in an increase in the pressure of the liquid trapped in the chamber 45.
  • the chamber 45 communicates, in particular by the channels between the fins 66 located along the outer wall of the skirt 63, with a small space 65 provided between the base 51 of the hollow piston 5 and the second piston 6 (if necessary using appropriate fins). Consequently, the same increased pressure P p is exerted on the end 67 of the skirt 63 and on the upper face of the second piston 6 whose surface is larger. This pressure P p is generally called precompression pressure and is therefore substantially greater than Po.
  • Another typical aspect of the prior art metering pump to which the present improvement applies relates to the pressurization of the container to using a gas.
  • the latter is in fact introduced by means of a pipe which hermetically covers the rod 52 of the hollow piston 5.
  • the pipe is provided with a needle which is engaged inside the rod 52 so that its end is placed in the bucket 70 at the end of the needle 61.
  • the needle is then able to push the second piston 6 inside the pump body 4.
  • the outlet valve formed by the cone 62 of the needle 61 abutting against the internal narrowing 53 of the rod 52.
  • the opening of the inlet valve in the pump chamber 45 is ensured.
  • the metering pump of the prior art provides means for breaking the seal between the open cylinder 44 and the free end 67 of the skirt 63 when the latter is fitted over a certain height.
  • these means are none other than the recesses 49 carried by the free edge of the open cylinder 44.
  • the corresponding fitting height is in this case relatively small, the free end 67 of the skirt 63 coming to the right of the recesses 49.
  • the fitting must be complete so that the free end 67 of the skirt 63 engages over the rib (s) 48 at the root of the open cylinder 44.
  • the present invention avoids this operating identity by a different calibration of the spring 7. From now on, it is expected to provide only part of the force necessary to push back the pistons while relying on the pressure Po to provide the additional solicitation. In other words, the restoring force which is assigned to the present spring 7 is less than that which characterized it until then, all other things being equal.
  • the return force of the spring 7 in a deformation state corresponding to the rest position of the pump goes for example from 600 to 700 gram force (gf) in the prior art to the range 150-200 gf. This noticeable reduction is not obtained in practice by imposing on the spring a lower initial deformation.
  • the reduced size of the pumps and therefore of the housing reserved for the spring requires rather a reduction in its stiffness thanks to an appropriate choice of the material used.
  • the calibration of the spring 7 according to the present invention supposes the prior choice of a minimum admissible pressure P′o. This is the smallest pressure that can reign in the container while still allowing the pump pistons to rise.
  • P′o is chosen between 1 and 2 bars.
  • the sprayer is intrinsically safe.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP91401716A 1990-07-09 1991-06-26 Dosierpumpe für Druckspritzen mit intrinsischer Sicherheit Expired - Lifetime EP0466544B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9008667 1990-07-09
FR9008667A FR2664182B1 (fr) 1990-07-09 1990-07-09 Pompe-doseuse pour pulverisateur sous pression avec securite intrinseque.

Publications (2)

Publication Number Publication Date
EP0466544A1 true EP0466544A1 (de) 1992-01-15
EP0466544B1 EP0466544B1 (de) 1993-09-08

Family

ID=9398490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401716A Expired - Lifetime EP0466544B1 (de) 1990-07-09 1991-06-26 Dosierpumpe für Druckspritzen mit intrinsischer Sicherheit

Country Status (4)

Country Link
US (1) US5190192A (de)
EP (1) EP0466544B1 (de)
DE (1) DE69100348T2 (de)
FR (1) FR2664182B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2715585A1 (fr) * 1994-01-28 1995-08-04 Oreal Ensemble de distribution d'un liquide, de façon quasi-continue, comportant une pompe et utilisation d'un tel ensemble pour la pulvérisation d'une laque capillaire.

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5397059A (en) * 1992-03-20 1995-03-14 L'oreal Dispenser equipped with a liquid pump and a pressurized gas/liquid nozzle
BR9201113A (pt) * 1992-03-30 1993-10-05 Jack Brakarz Aperfeicoamento em micro-bomba atomizadora de liquidos
WO1994015715A1 (en) * 1992-12-31 1994-07-21 Philip Meshberg Atomizing pump
FR2719242B1 (fr) * 1994-04-27 1996-07-12 Valois Sa Pompe à précompression perfectionnée.
US6050457A (en) * 1995-12-06 2000-04-18 The Procter & Gamble Company High pressure manually-actuated spray pump
DE19609181A1 (de) * 1996-03-09 1997-09-11 Pfeiffer Erich Gmbh & Co Kg Austragvorrichtung für Medien
US5626264A (en) * 1996-08-09 1997-05-06 Calmar Inc. Precompression pump sprayer
US6200288B1 (en) 1997-08-26 2001-03-13 Queen's University At Kingston Everting toroid device for insertion into a body cavity
US5954688A (en) * 1997-08-26 1999-09-21 Queen's University At Kingston Everting toroid device for delivering a drug into a body cavity
US5918778A (en) * 1997-12-19 1999-07-06 Emson, Inc. Pump and pump securing device which maintains consistent dosage accuracy, and method of securing a pump to a container
FR2794727B1 (fr) * 1999-06-10 2001-08-24 Valois Sa Dispositif de distribution de produit fluide ameliore
FR2796921B1 (fr) * 1999-07-28 2001-10-05 Valois Sa Dispositif de distribution de produit fluide avec systeme d'obturation
FR2798366B1 (fr) * 1999-09-15 2002-01-18 Valois Sa Dispositif de distribution a bague de fixation emmanchee
FR2813593B1 (fr) * 2000-09-07 2002-12-06 Valois Sa Dispositif de distribution de produit fluide de type multidose
FR2832767B1 (fr) * 2001-11-28 2005-10-07 Valois Sa Pompe de distribution de produit fluide et dispositif de distribution de produit fluide incorporant une telle pompe
US6830163B2 (en) * 2002-04-17 2004-12-14 Valois S.A.S. Fluid dispenser pump
FR2859460B1 (fr) * 2003-09-10 2005-11-04 Valois Sas Pompe de distribution de produit fluide
US7134579B2 (en) * 2004-11-15 2006-11-14 Ultramotive Corporation RTV silicone spray system
NL2015724B1 (en) 2015-11-04 2017-05-24 Gab Eng & Dev B V Storage holder for a dispenser.
NL2016644B1 (en) 2016-04-20 2017-11-07 Gab Eng & Development B V Storage holder for a dispenser
RU175003U1 (ru) * 2017-06-05 2017-11-15 Иностранное производственное унитарное предприятие "АЛКОПАК" Дозирующий насос для выдачи жидкости или геля из ёмкости

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497774A1 (fr) * 1980-12-11 1982-07-16 Normos Norbert Procede et dispositif d'ejection de liquide
WO1982004203A1 (en) * 1981-06-04 1982-12-09 Kalat Edwin F Pressurized container with dispensing pump
EP0145908A1 (de) * 1983-11-24 1985-06-26 Leonhard Fischer & Co. GmbH Behälter für versprühbare Medien mit Kolbenpumpe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610700A (en) * 1983-11-04 1986-09-09 Union Carbide Corporation Adsorbent composition useful in retarding corrosion in mufflers
FR2620052B1 (fr) * 1987-09-09 1990-04-27 Valois Vaporisateur du type pompe manuelle a precompression pour utilisation avec un gaz propulseur
FR2626851B1 (fr) * 1988-02-05 1990-07-06 Step Soc Tech Pulverisation Dispositif pour faciliter le remplissage des vaporisateurs
EP0345132B1 (de) * 1988-06-02 1993-09-22 Societe Technique De Pulverisation Step Vordruck Dosierpumpe mit verbessertem Ansaugverhalten
FR2656901B1 (fr) * 1990-01-08 1993-02-19 Step Soc Tech Pulverisation Perfectionnement d'une pompe-doseuse a precompression pour en ameliorer l'amorcage et garantir sa simplicite d'assemblage.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497774A1 (fr) * 1980-12-11 1982-07-16 Normos Norbert Procede et dispositif d'ejection de liquide
WO1982004203A1 (en) * 1981-06-04 1982-12-09 Kalat Edwin F Pressurized container with dispensing pump
EP0145908A1 (de) * 1983-11-24 1985-06-26 Leonhard Fischer & Co. GmbH Behälter für versprühbare Medien mit Kolbenpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2715585A1 (fr) * 1994-01-28 1995-08-04 Oreal Ensemble de distribution d'un liquide, de façon quasi-continue, comportant une pompe et utilisation d'un tel ensemble pour la pulvérisation d'une laque capillaire.
EP0669167A1 (de) * 1994-01-28 1995-08-30 L'oreal Anordnung zur quasi-kontinuierlichen Abgabe von Flüssigkeiten mit einer Pumpe und Gebrauch einer solchen Anordnung zum Zerstäuben von Haarlack
US5622286A (en) * 1994-01-28 1997-04-22 L'oreal Manually actuated dispensing unit for spraying a liquid in the form of droplets in a virtually continuous manner

Also Published As

Publication number Publication date
DE69100348T2 (de) 1994-03-24
US5190192A (en) 1993-03-02
EP0466544B1 (de) 1993-09-08
DE69100348D1 (de) 1993-10-14
FR2664182A1 (fr) 1992-01-10
FR2664182B1 (fr) 1992-10-09

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