EP0966331B1 - Piston pour mettre dans une cartouche remplie - Google Patents

Piston pour mettre dans une cartouche remplie Download PDF

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Publication number
EP0966331B1
EP0966331B1 EP98966418A EP98966418A EP0966331B1 EP 0966331 B1 EP0966331 B1 EP 0966331B1 EP 98966418 A EP98966418 A EP 98966418A EP 98966418 A EP98966418 A EP 98966418A EP 0966331 B1 EP0966331 B1 EP 0966331B1
Authority
EP
European Patent Office
Prior art keywords
piston
pocket
air outlet
outlet opening
cartridge
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
EP98966418A
Other languages
German (de)
English (en)
Other versions
EP0966331A1 (fr
Inventor
Chemtech Ag Sulzer
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.)
Sulzer Chemtech AG
Original Assignee
Sulzer Chemtech AG
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 Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Publication of EP0966331A1 publication Critical patent/EP0966331A1/fr
Application granted granted Critical
Publication of EP0966331B1 publication Critical patent/EP0966331B1/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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B05C17/00579—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • 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
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means

Definitions

  • the invention relates to a Piston for insertion into a filled cartridge according to the preamble of claim 1
  • This type of piston is e.g. known from EP 0 397 589 A1.
  • vent valves on the piston which when the Pistons in the cartridge can be opened using a specially shaped plunger. This requires specially adapted ram and requires relatively narrow Manufacturing tolerances for the vent valves. These vent valves also have proven to be prone to failure.
  • Inner cylinder has a pressure plate that can be displaced therein, with a plate that runs outdoors Vent opening. There is also one from the pressure plate in the inner cylinder separate, independent filter arrangement with one inside the inner cylinder slidable filter housing provided. The pressure plate and the separate filter arrangement form a piston with which the previously by pushing the inner cylinder into the Cartridge mixed components are pushed out of the cartridge.
  • the Pressure plate forms the piston surface in which the opening to the outside Removal of the residual air located in the inner cylinder is arranged.
  • a granulate syringe known from US Pat. No. 5,181,918 contains a cylindrical one Syringe housing, in which an consisting of a piston rod and a piston head Piston is inserted.
  • the conical piston head rests on a porous one Plastic existing plug on when the plunger is pushed into the syringe housing is moved in the direction of the outlet opening of the syringe housing.
  • the pore size of the Plug material is selected such that the plug is air-permeable, but one Prevents the granules from escaping from the syringe.
  • the piston 1 is inserted into the open end of a cartridge 2, which was previously filled.
  • the piston 1 has sealing lips 3, 4 at both ends, wherein the elasticity of the sealing lip 3 facing the cartridge 2 is achieved by a circumferential incision 5.
  • a vent opening 7 is provided in the center, which extends to Piston underside extended.
  • the vent opening is integrally formed on the piston 1 7 surrounding cylindrical pocket 8, which is open to the underside of the piston.
  • a cylindrical micropore filter 9 is used. It is about a porous filter, as is known in medical technology for the filtration of liquids is.
  • This micropore filter 9 preferably consists of a sintered material Plastic, for example made of PE or PTFE with a pore size of 10 ⁇ m to 80 microns.
  • the sintered material has open pores.
  • the pocket 8 can also be formed by the cylindrical wall 10 of the piston 1.
  • FIG. 4 shows a section through an annular piston of a two-component coaxial cartridge.
  • This piston has an open cylindrical pocket 8 provided that has a bottom 11 on its side facing away from the piston side, on which the ventilation opening 7 is formed.
  • this pocket 8 it is Microporous filter 9 used.
  • the piston 1 consists of a soft and non-resistant to the filling material not diffusion-tight plastic, then a thin one can be on the top of the piston Cover plate are attached, which are made from a filler material diffusion-tight and resistant to the filling material.
  • This The cover panel is provided with a large number of small ventilation openings. In the case In the embodiment according to FIG. 4, this cover plate is ring-shaped. It protects not only the piston against the filling material, but also prevents the filter 9 comes into direct contact with the filling material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • External Artificial Organs (AREA)
  • Massaging Devices (AREA)
  • Arc Welding In General (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un dispositif pour évacuer l'air résiduel lors de l'introduction d'un piston (1) dans une cartouche pleine (2), ledit dispositif comprenant au moins une ouverture d'évacuation d'air (7) s'étendant vers l'air libre à partir de la surface de piston (6). Ce type de dispositif d'évacuation d'air s'est avéré peu fiable et nécessite des poussoirs spécialement adaptés. L'invention vise à créer un dispositif d'évacuation d'air permettant l'évacuation d'air lors de l'introduction du piston, sans manipulation supplémentaire. A cet effet, une poche (8), dans laquelle est placé un filtre microporeux (9), est formée sur la surface de piston (6) au niveau de l'ouverture d'évacuation d'air (7).

Claims (6)

  1. Piston à insérer dans une cartouche (2) remplie, comportant au moins une ouverture (7) d'évacuation d'air débouchant à l'air libre à partir de la surface (6) du piston, une poche (8) formée sur la surface (6) du piston dans la région de l'ouverture (7) d'évacuation d'air, et un filtre (9) qui est disposé dans la poche (8) et qui recouvre l'ouverture (7) d'évacuation d'air, caractérisé en ce que le filtre (9) est un filtre microporeux à pores ouverts, constitué d'une matière plastique frittée et à pores ouverts, d'une taille de pores comprise entre 10 et 80 µm, filtre qui permet à l'air résiduel de s'échapper, mais qui empêche le fluide rempli dans la cartouche (2) de sortir par l'ouverture (7) d'évacuation d'air.
  2. Piston selon la revendication 1, caractérisé en ce que la poche (8) est réalisée cylindrique et est ouverte vers le dessous du piston.
  3. Piston selon la revendication 1, caractérisé en ce que la poche (8) est réalisée cylindrique, est ouverte vers le dessus du piston et comporte, sur le côté opposé au dessus du piston, un fond (11) muni de l'ouverture (7) d'évacuation d'air.
  4. Piston selon la revendication 1, caractérisé en ce que la poche (8) est formée par la paroi (10) du piston.
  5. Piston selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la matière plastique frittée est du polyéthylène (PE) ou du polytétrafluoréthylène (PTFE).
  6. Piston selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le dessus du piston est recouvert par un mince disque de recouvrement comportant une multiplicité de petites ouvertures d'évacuation d'air.
EP98966418A 1998-01-15 1998-12-28 Piston pour mettre dans une cartouche remplie Expired - Lifetime EP0966331B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29800594U 1998-01-15
DE29800594U DE29800594U1 (de) 1998-01-15 1998-01-15 Entlüftungsvorrichtung
PCT/EP1998/008502 WO1999036188A1 (fr) 1998-01-15 1998-12-28 Dispositif d'evacuation d'air

Publications (2)

Publication Number Publication Date
EP0966331A1 EP0966331A1 (fr) 1999-12-29
EP0966331B1 true EP0966331B1 (fr) 2002-08-21

Family

ID=8051282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966418A Expired - Lifetime EP0966331B1 (fr) 1998-01-15 1998-12-28 Piston pour mettre dans une cartouche remplie

Country Status (3)

Country Link
EP (1) EP0966331B1 (fr)
DE (2) DE29800594U1 (fr)
WO (1) WO1999036188A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD657876S1 (en) 2010-02-02 2012-04-17 3M Innovative Properties Company Dental capsule

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29913396U1 (de) * 1999-07-31 2000-01-20 Prestele, Eugen, 86179 Augsburg Kolben für eine Kartusche
DE20010417U1 (de) 2000-06-09 2001-10-11 Sulzer Chemtech Ag, Winterthur Entlüftungsvorrichtung bei einem Kolben für eine Kartusche
DE20103911U1 (de) * 2001-03-06 2002-07-11 Alusuisse Bayrisches Druckguß-Werk GmbH & Co. KG, 85570 Markt Schwaben Dichtmittelbehälter
DE20117778U1 (de) 2001-10-31 2003-03-20 Sulzer Chemtech Ag, Winterthur Kartuschenkolben mit Entlüftung
DE10235599A1 (de) * 2002-08-02 2004-02-19 Ritter Gmbh Kolben mit Entlüftung für Kartuschen zur Aufnahme und Abgabe plastischer Massen
US9844796B2 (en) 2005-10-14 2017-12-19 3M Innovative Properties Company Plunger and plunger assembly for a cartridge, system for storing a substance, and method of filling and sealing a substance in a delivery system
US8511350B2 (en) 2009-12-22 2013-08-20 Sulzer Mixpac Ag Piston setting device and method
EP3299082A1 (fr) 2016-09-21 2018-03-28 3M Innovative Properties Company Ensemble mélangeur et dispositif de distribution de matériau dentaire

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405249A (en) * 1980-03-28 1983-09-20 National Research Development Corporation Dispensing apparatus and method
DK235589D0 (da) * 1989-05-12 1989-05-12 Wolff & Kaaber Fremgangsmaade og indretning til blanding af en fast og en flydende komponent
DE9011685U1 (de) * 1990-08-10 1991-12-12 THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte, 82229 Seefeld Granulatspritze
JP2905325B2 (ja) * 1991-11-21 1999-06-14 東レ・ダウコーニング・シリコーン株式会社 シーラント用カートリッジ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD657876S1 (en) 2010-02-02 2012-04-17 3M Innovative Properties Company Dental capsule
USD658763S1 (en) 2010-02-02 2012-05-01 3M Innovative Properties Company Dental capsule

Also Published As

Publication number Publication date
EP0966331A1 (fr) 1999-12-29
DE59805244D1 (de) 2002-09-26
WO1999036188A1 (fr) 1999-07-22
DE29800594U1 (de) 1998-03-26

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