EP1379336B1 - Pompe distributrice - Google Patents

Pompe distributrice Download PDF

Info

Publication number
EP1379336B1
EP1379336B1 EP02722545A EP02722545A EP1379336B1 EP 1379336 B1 EP1379336 B1 EP 1379336B1 EP 02722545 A EP02722545 A EP 02722545A EP 02722545 A EP02722545 A EP 02722545A EP 1379336 B1 EP1379336 B1 EP 1379336B1
Authority
EP
European Patent Office
Prior art keywords
piston
annular
pump
chamber
pump according
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
EP02722545A
Other languages
German (de)
English (en)
Other versions
EP1379336A2 (fr
Inventor
Stefano Santagiuliana
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.)
Taplast SRL
Original Assignee
Taplast SRL
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 Taplast SRL filed Critical Taplast SRL
Priority to EP02722545A priority Critical patent/EP1379336B1/fr
Publication of EP1379336A2 publication Critical patent/EP1379336A2/fr
Application granted granted Critical
Publication of EP1379336B1 publication Critical patent/EP1379336B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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 present invention relates to a delivery pump to be coupled to the neck of a container, particularly adapted to deliver fluids of food products, liquid detergents, creams or perfumes.
  • the delivery pumps of the prior art generally comprise a hollow body defining a suction/compression chamber for the fluid to be delivered, communicating with the container interior through a suction duct.
  • a first tight piston is slidingly coupled to the hollow body. Said tight piston in . its turn is slidingly and coaxially coupled to one end of a second piston internally provided with a tubular chamber.
  • the tubular chamber of the second piston communicates with outside through a delivery duct and with the suction/compression chamber through one or more holes made on a bottom member of the second piston.
  • Said holes are shut through two annular edges belonging to the first piston and coupled to corresponding grooves made on the bottom member of the second piston.
  • Valve means generally consisting of metal balls, interposed between the suction/compression chamber and the container interior, regulate inflow and outflow of fluid to and from the chamber.
  • elastic means generally consisting of helical springs, interposed between the hollow body and the pistons warrant return of said pistons to the rest position when delivery is over.
  • the user acting on the piston loads the elastic means and compresses the liquid contained in the suction/compression chamber at the same time bringing the first piston to its top dead centre so as to move away the annular edges of the bottom member. This action allows outflow of the liquid contained in the suction/compression chamber to the delivery duct.
  • the efficiency of suction and also the good operation of the pump in the subsequent delivery stage is caused by the seal obtained by the couple of annular edges of the first piston and the characteristics of the material used for the their manufacture.
  • a first limitation of the above mentioned designs consists in that said pumps have a limited efficiency of liquid suction from the container.
  • the object of the present invention is to overcome the above mentioned limitations and drawbacks.
  • a first object of the invention is to provide a pump insensitive to mechanical and thermal stresses underwent during the transport and stockage phases so as to warrant always a perfect sealing condition.
  • Another object is to provide a pump keeping the suction efficiency substantially constant with time.
  • a further object is to provide a delivery pump having a suction efficiency higher than the prior art pumps.
  • Still a further object is to provide a pump that after its use can be completely and immediately recycled without requiring any previous dismantling operation to separate different incompatible materials.
  • An additional object is to provide a pump which is particularly easy to be used and reliable.
  • a last but not least object is to provide, a very cheap pump of easy construction and assembly, suitable for the mass production.
  • a delivery pump for containers of fluids to be delivered that according to the main claim comprises:
  • the seal required to prevent leakage of liquid when the pump is at rest is obtained by providing three sealing zones acting at the same time, with the provision that each sealing device has at least two active surfaces, that is two annular sealing zones. According to a preferred embodiment of the invention this is obtained by the particular frustum conical configuration of the edges of the first piston.
  • the invention surprisingly allows to obtain delivery pumps having a higher suction efficiency relative to the traditional pumps, substantially constant with time.
  • the pump of the invention resulted to be insensitive to long inoperative periods.
  • the delivery pump of the present invention is shown in Fig. 1 where it is generally indicated with numeral 1.
  • the pump is provided with means 2 for the removable coupling to the neck O of a container C containing the fluid F to be delivered.
  • the pump comprises a hollow body 3 defining a first suction/compression chamber 4 for the fluid F to be delivered, communicating with the interior of container C through a suction duct 4a.
  • a first tight piston 5 is slidingly coupled to the hollow body 3, said piston being slidingly and coaxially coupled also to a bottom member 6 connected to a second piston 7, internally provided with a tubular chamber 8.
  • first piston 5 has a first annular wall 51 slidingly engaged on the cylindrical surface 31 of the first suction/compression chamber 4.
  • Said piston 5 is provided with a second generally cylindrical wall 52 of a smaller diameter that the first wall 51.
  • An annular lip 53 protrudes from the cylindrical wall 52 and extends to the first cylindrical chamber 4 of the pump body 3 starting from a generally flat annular surface 54 that as it will be explained hereinafter, acts as a striker for drawing said first piston 5 during pump operation.
  • a second piston 7 Inside said first piston 5 there is a second piston 7 with a tubular cavity 8 connected at its first end to the delivery duct 12 of the pump and at the other end to a bottom member 6 rigidly connected to said second piston.
  • annular bottom member 6 is rigidly connected to the second piston 7 through a snap connection of two annular cavities made on said bottom member conjugated with corresponding protrusions made on the tubular bottom portion of the piston 7.
  • the bottom member 6 has a set of holes 61 putting the tubular chamber 8 of the second piston 7 in communication with the first cylindrical chamber 4 when the pump is in the working position, as shown in Figs. 3 and 4, that is when the bottom member 6 is spaced from the lower lip 521 of the cylindrical wall 52 of the first piston 5.
  • the bottom member 6 has also two lower and upper annular grooves 62 and 63 respectively, co-operating with corresponding annular edges belonging to the second cylindrical wall 52 and the annular lip 53 of the first piston when the pump is at rest and is returned by elastic means generally indicated with numeral 16.
  • Said elastic means 16 consist of a bellows spring 40 fully made of plastic material and having a perimetral spiral ridge 41.
  • Said bellows spring is connected at one side to the delivery cap 13 and at the other side to the pump connection means 2.
  • the delivery cap 13 is rigidly connected also to the last part of the second piston 7 so that when the pump is manually actuated, exerting with fingers a pressure on the delivery cap and therefore on the bellows 40, the piston 7 is drawn downwards and consequently the annular flat surface 71 of such a piston goes into contact with the annular surface 54 of the first piston drawing it downwards.
  • an annular opening 14 is created through which the previously pumped fluid present in the first chamber 4 is transferred through the holes 61, inside the tubular chamber 8 of piston 7 and to the outside through said chamber and the duct 12.
  • the second piston 7 is guided in its stroke by the cylindrical part 91 of an intermediate body 9, which is arranged inside the pump body 3.
  • the intermediate body 9 may be structurally separated from the pump body 3 or moulded as a single piece with the pump body 3.
  • Said intermediate body 9 has also a groove 92 that as explained hereinafter, co-operates with the annular edge of the second cylindrical wall 52 of the first piston 51.
  • a double sealing surface can offer a greater sealing warranty in comparison with a single surface.
  • the edges have a frustum conical profile while the grooves belong to surfaces that in view of their shape define together with the surface of the annular edges at least a double sealing ring.
  • the surfaces 521a and 521b of the edge 521 create two sealing rings with corresponding surfaces 63a and 63b of the groove 63. In this way, any possible pouring from chamber 4 to chamber 8 and therefore leakage of liquid is clearly prevented.
  • FIG. 4 A first constructional version of the sealing zones is shown in detail in Figs. 4 and 6. Such a version is different from the preceding embodiment because the sealing edges of the cylindrical wall 52 have each the curved profile instead of a frustum conical one.
  • each surface 21b, 20b belonging to the edge 521 of the cylindrical wall 52 and 21a, 20a belonging to a corresponding groove 62 is constituted by a parabola stretch.
  • Fig. 6 provides that surfaces 22a, 23a and 22b, 23b of each edge and each groove belong to an arc of circle.
  • the two surfaces may have one a curved profile and the other a rectilinear profile or vice-versa as shown in Figs. 7 and 8.
  • FIG. 9 Another constructional version shown in detail in Fig. 9 is different from the preceding one because the sealing surfaces of the edges of the cylindrical wall 52 and of each conjugated groove define four discrete annular sealing zones instead of only two as in the preceding embodiments. Indeed, a first couple of seals is obtained conjugating the surfaces 26a with 26b and surfaces 27a with 27b while another couple is obtained conjugating surfaces 24a with 24b and 25a with 25b.
  • the delivery pump 1 is fully made of plastic material making it immediately and totally recyclable.
  • the plastic material used for making the first piston 5 has special mechanical features allowing to obtain an optimal seal.

Landscapes

  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention concerne une pompe distributrice pour fluides, comprenant un corps de pompe (3) relié à un conteneur (C), un premier piston (5) présentant une deuxième paroi cylindrique (52) et une lèvre annulaire (53) en saillie, un deuxième piston creux (7) coaxial au premier piston (5) et possédant un élément de base (6) pourvu de rainures annulaires (62, 63) coopérant avec le premier piston (5) pour définir des zones d'étanchéité, des moyens élastiques (16) faisant revenir les pistons en position de repos après une distribution, ainsi qu'un corps intermédiaire (9) situé à l'intérieur du corps de pompe et pourvu d'une rainure annulaire (92) faisant face au premier piston. Les bords (521, 522) de la deuxième paroi cylindrique (52) et le bord (531) de la lèvre annulaire (53) définissent trois zones d'étanchéité présentant chacune un profil d'étanchéité formé par au moins deux surfaces coopérant avec des surfaces correspondantes de chaque rainure annulaire (62, 63, 92) ménagée dans l'élément de base et le corps intermédiaire.

Claims (11)

  1. Une pompe de refoulement pour fluides comprenant:
    - un corps de pompe (3) reliée par des moyens de connexion (2) au collet d'un conteneur (C) contenant un liquide devant être débité, ledit corps de pompe définissant une première chambre généralement cylindrique (4) indiquée pour recevoir le liquide s'écoulant de l'intérieur dudit conteneur, ladite première chambre étant équipée de soupapes (17) indiquées pour mettre en communication ladite première chambre avec ledit conteneur à liquide;
    - un premier piston (5) ayant une première paroi annulaire (51) coulissant sur la surface cylindrique (31) de ladite première chambre, ledit premier piston ayant une deuxième paroi généralement cylindrique (52), interne par rapport à ladite première paroi annulaire, et une lèvre annulaire (53) dépassant de ladite deuxième paroi et étant en face de ladite chambre cylindrique (4);
    - un deuxième piston creux (7) coaxial avec ledit premier piston (5) de manière à définir une deuxième chambre tubulaire (8), ledit deuxième piston étant relié à une extrémité avec un tuyau de refoulement du liquide (12) et ayant à l'autre extrémité une pièce inférieure (6) relié d'une manière rigide audit deuxième piston (7), ladite pièce inférieure (6) étant munie d'un ou plusieurs trous (61) mettant ladite chambre tubulaire (8) en communication avec ladite première chambre (4) dudit corps de pompe et ayant des cannelures annulaires (62, 63) coopérant avec ledit premier piston (5) pour définir des zones d'étanchéité;
    - des moyens élastiques (16) indiqués pour faire retourner lesdits premier et deuxième pistons en position de repos après l'opération de débit du liquide;
    - un corps intermédiaire (9) positionné à l'intérieur dudit corps de pompe, ledit corps intermédiaire définissant une cavité cylindrique (91) sur laquelle ledit deuxième piston coulisse et ayant une cannelure annulaire (92) en face dudit premier piston,
    les bords (521, 522) de ladite deuxième paroi cylindrique (52) et le bord (531) de ladite lèvre annulaire (53) dudit premier piston définissent trois zones d'étanchéité, chaque zone ayant un profil d'étanchéité formé d'au moins deux surfaces coopérant avec des surfaces correspondantes appartenant à chaque cannelure annulaire (62, 63, 92) réalisée sur ladite pièce inférieure et sur ledit corps intermédiaire.
  2. La pompe selon la revendication 1 caractérisée en ce que les bords (521, 522) de ladite deuxième paroi cylindrique et le bord de ladite lèvre annulaire (531 ) dudit premier piston (5) et les cannelures correspondantes (62, 63, 92) coopérant avec lesdits bords ont un profil essentiellement à tronc de cône.
  3. La pompe selon la revendication 1 caractérisée en ce que les bords de ladite deuxième paroi cylindrique et le bord de ladite lèvre annulaire dudit premier piston ont un profil essentiellement courbé et coopèrent avec des cannelures correspondantes (62) compatibles avec lesdits profils et vice versa (fig. 7, fig. 8).
  4. La pompe selon la revendication 1 caractérisée en ce que les bords de ladite deuxième paroi cylindrique (52) et le bord de ladite lèvre annulaire (53) dudit premier piston chacun définit avec les cannelures correspondantes, quatre zones annulaires d'étanchéité (fig. 9).
  5. La pompe selon la revendication 1 caractérisée en ce que le bord supérieur (522) de ladite deuxième paroi cylindrique (52) dudit premier piston (5) coopère avec la cannelure annulaire (92) réalisée sur ledit corps intermédiaire et le bord inférieur (521) de ladite deuxième paroi cylindrique (52) dudit premier piston coopère avec la première cannelure annulaire (62) réalisée sur ladite pièce inférieure.
  6. La pompe selon la revendication 1 caractérisée en ce que le bord (531) de ladite lèvre annulaire (53) coopère avec la deuxième cannelure annulaire (63) réalisée sur ladite pièce inférieure.
  7. La pompe selon la revendication 1 caractérisée en ce que ladite lèvre annulaire (53) dudit premier piston a une surface généralement plane (54) en contraste avec une saillie annulaire correspondante (71) de la surface extérieure dudit deuxième piston creux (7) de manière à ce que ledit deuxième piston entraîne ledit premier piston durant la phase de refoulement du liquide de ladite pompe.
  8. La pompe selon la revendication 1 caractérisée en ce qu'elle a une ou plusieurs ouvertures (65) indiquées pour le passage de l'air entre ledit conteneur à liquide et l'extérieur, ladite ouverture étant positionnée au-dessus du point mort supérieur dudit premier piston.
  9. La pompe selon la revendication 1 caractérisée en ce que lesdits moyens élastiques (16) consistent en un ressort à soufflet (40) réalisé en matériau plastique.
  10. La pompe selon la revendication 9 caractérisée en ce que ledit ressort à soufflet (40) a au moins une nervure en spiral (41).
  11. La pompe selon la revendication 1 caractérisée en ce que lesdites soupapes (17) comprennent une boule (42) réalisée en matériau plastique.
EP02722545A 2001-04-10 2002-04-09 Pompe distributrice Expired - Lifetime EP1379336B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02722545A EP1379336B1 (fr) 2001-04-10 2002-04-09 Pompe distributrice

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01830249 2001-04-10
EP20010830249 EP1249278A1 (fr) 2001-04-10 2001-04-10 Distributeur à pompe
EP02722545A EP1379336B1 (fr) 2001-04-10 2002-04-09 Pompe distributrice
PCT/IB2002/001134 WO2002083318A2 (fr) 2001-04-10 2002-04-09 Pompe distributrice

Publications (2)

Publication Number Publication Date
EP1379336A2 EP1379336A2 (fr) 2004-01-14
EP1379336B1 true EP1379336B1 (fr) 2004-12-22

Family

ID=8184487

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20010830249 Withdrawn EP1249278A1 (fr) 2001-04-10 2001-04-10 Distributeur à pompe
EP02722545A Expired - Lifetime EP1379336B1 (fr) 2001-04-10 2002-04-09 Pompe distributrice

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20010830249 Withdrawn EP1249278A1 (fr) 2001-04-10 2001-04-10 Distributeur à pompe

Country Status (5)

Country Link
EP (2) EP1249278A1 (fr)
AU (1) AU2002253430A1 (fr)
DE (1) DE60202359T2 (fr)
ES (1) ES2235032T3 (fr)
WO (1) WO2002083318A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014181218A2 (fr) 2013-05-08 2014-11-13 Taplast S.P.A. Dispositif pour distribuer des fluides
WO2014181217A2 (fr) 2013-05-08 2014-11-13 Taplast S.P.A. Dispositif pour distribuer des fluides

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20040169A1 (it) * 2004-07-09 2004-10-09 Taplast Spa Unita' per l'erogazione di fluidi o miscele e relativo dispositivo di erogazione
CN101068728B (zh) * 2004-11-30 2011-02-16 雷克斯姆分配***股份公司 用于分配液体产品的非排气泵及相关的分配器
CN106812963A (zh) * 2017-02-07 2017-06-09 安徽嘉伟新材料科技有限责任公司 一种复合新型排气阀
KR102113970B1 (ko) * 2020-03-06 2020-05-21 주식회사 동기피엔아이 논메탈 타입 화장품 용기의 펌프 어셈블리
WO2023110890A1 (fr) * 2021-12-13 2023-06-22 Rieke Packaging Systems Limited Distributeur à polymère unique pour fluides visqueux et huiles

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT211917Z2 (it) * 1987-07-30 1989-05-25 Elettro Plastica Srl Pompa di erogazione applicabile a contenitori di fluidi.
EP0591365B1 (fr) * 1991-06-26 1995-12-20 Valois S.A. Dispositif pour projeter une dose predeterminee d'un produit fluide, et son procede de remplissage
IT1252216B (it) * 1991-12-16 1995-06-05 Sar Spa Erogatore di sostanze liquide o sottoforma di crema o pasta
CA2665953C (fr) * 1995-01-27 2012-05-01 Yoshino Kogyosho Co., Ltd. Pompe a jet pour liquide
FR2764005B1 (fr) * 1997-05-29 2004-12-10 Sofab Pompe a piston articule
FR2776633B1 (fr) * 1998-03-26 2000-06-09 Valois Sa Dispositif de distribution airless
FR2792553B1 (fr) * 1999-04-22 2002-04-19 Valois Sa Dispositif de distribution biphasique
DE29908586U1 (de) * 1999-05-14 1999-08-05 Seaquist Perfect Dispensing GmbH, 44319 Dortmund Handbetätigte Pumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014181218A2 (fr) 2013-05-08 2014-11-13 Taplast S.P.A. Dispositif pour distribuer des fluides
WO2014181217A2 (fr) 2013-05-08 2014-11-13 Taplast S.P.A. Dispositif pour distribuer des fluides

Also Published As

Publication number Publication date
WO2002083318A3 (fr) 2002-12-12
AU2002253430A1 (en) 2002-10-28
DE60202359T2 (de) 2006-01-19
WO2002083318A2 (fr) 2002-10-24
ES2235032T3 (es) 2005-07-01
EP1249278A1 (fr) 2002-10-16
EP1379336A2 (fr) 2004-01-14
DE60202359D1 (de) 2005-01-27

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