EP1207969A1 - Ventilation device for a piston for a cartridge - Google Patents

Ventilation device for a piston for a cartridge

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Publication number
EP1207969A1
EP1207969A1 EP01913897A EP01913897A EP1207969A1 EP 1207969 A1 EP1207969 A1 EP 1207969A1 EP 01913897 A EP01913897 A EP 01913897A EP 01913897 A EP01913897 A EP 01913897A EP 1207969 A1 EP1207969 A1 EP 1207969A1
Authority
EP
European Patent Office
Prior art keywords
piston
valve
piston part
venting device
filter section
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
EP01913897A
Other languages
German (de)
French (fr)
Other versions
EP1207969B2 (en
EP1207969B1 (en
Inventor
Nikolaus Brugner
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
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Application filed by Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
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Application granted granted Critical
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Publication of EP1207969B2 publication Critical patent/EP1207969B2/en
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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

Definitions

  • the innovation relates to a ventilation device in a piston for a cartridge according to the preamble of claim 1.
  • a micropore filter is inserted into a pocket shaped on the piston.
  • the air trapped between the filling compound and the piston can escape through this micro-pore filter when the piston is inserted into the cartridge.
  • This micropore filter is also intended to prevent the filling compound from escaping.
  • Components of certain filling compounds have a creeping oil-like behavior when the cartridges are stored. These components pass through the micropore filter, which leads to leakages.
  • venting device is shown in DE GM 295 06 800.
  • the venting is carried out here via a plurality of valve pins attached to a part circle of the piston cover, which are lifted off by nentil cones when the piston is pressed into the cartridge and thereby enable the air outlet.
  • this venting device can only be produced with narrow manufacturing tolerances.
  • Another disadvantage is the fact that parts of the filling compound can penetrate up to the valves, which thereby contaminate them, so that their sealing function is impaired.
  • the task is to design it in such a way that the valve remains dry and free of dirt.
  • the valve should prevent creeping oil-like constituents from escaping.
  • FIG. 1 shows a section through a first embodiment of a piston
  • Figure 2 shows a section through an annular piston with the ventilation device
  • FIG. 3 shows a section through a second embodiment of a piston with the ventilation device closed
  • Figure 4 shows a section through the piston of Figure 3 with the open
  • Figure 5 a section through a third embodiment of a piston.
  • the piston according to FIG. 1 has a first piston part 1, which is provided with a sealing lip 2, which comes into contact with the cartridge wall.
  • This piston part 1 has a circular cylindrical recess 3.
  • the piston also has a second piston part 4.
  • This piston part 4 has a circular cylindrical wall part 5, which is locked at the bottom of the recess 3 with the first piston part 1.
  • the snap connection is designated 6.
  • the circular cylindrical wall part 5 merges into a valve pin 7 in an arc shape.
  • This valve pin 7 penetrates a cylindrical bore 11 on the first piston part 1 and has a valve cone 9 which comes into contact with a valve lip 10 of the first piston part 1.
  • the arcuate transition region 8 engages over the cylindrical wall 12 between the bore 11 and the depression 3.
  • the latching 6 is interrupted by a small air duct 13.
  • a filter section 14 is formed between the outside of the wall 12 and the inside of the circular-cylindrical wall part 5. This filter section 14 consists of narrow channels on the inner wall of the wall part 5.
  • the arcuate transition area 8 causes the valve pin 7 to be pressed against the piston rear side.
  • valve pin 7 If the piston is inserted into a cartridge by a tool, the valve pin 7 is moved upward, whereby the valve formed by the parts 9, 10 is opened.
  • the air enclosed between the filling compound and the piston escapes via the recess 3, the channel 13 and the filter section 14 and exits via the valve 9, 10.
  • filling compounds which secrete creeping oil-like constituents it is possible that they overcome the filter section 14, but their escape is prevented by the valve 9, 10.
  • the filter valve according to FIG. 1 is integrated in an annular piston 15.
  • This ring piston is covered by a cover disk 16, which consists of a plastic material that is not attacked by the filling compound.
  • This cover plate has at least one ventilation hole 17 and / or a ventilation channel 18, via which the air trapped between the piston and the filling compound can escape to the filter valve.
  • FIGS. 3 and 4 differs from that according to FIG. 1 primarily in that instead of the curved transition area 8 there is now a disk-shaped transition area 19.
  • This disc-shaped transition region 19 has a spring function, which causes the valve cone 9 to be pressed against the valve lip 10.
  • the filter section 14 is formed by a helical channel 21
  • the filter section 14A according to FIGS. 3 and 4 is formed by axially extending grooves 22 which are formed on the second piston part 4.
  • helical grooves can also be provided.
  • FIG. 4 illustrates how a piston setting tool 23 starts against the valve pin 7 and thus the valve 9, 10 opens.
  • the first piston part 1 has a central bore 23 into which the second piston part 24 is inserted.
  • a filter section 14 is formed between the bore 23 and the second piston part 24.
  • a sealing lip 25 is formed, which comes to rest against a tapering region 26 of the bore 23.
  • the filter section 14 can be formed by circumferential channels which have interruptions for the passage of air between the channels. It can also be formed by longitudinal ribs according to FIG. 3.
  • the filter section 14 is preferably formed by helical threads. The channels of the filter section are only a few tenths of a millimeter thick, so that viscose fillings cannot pass through them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

The invention relates to a ventilation device for a piston for a cartridge, comprising a first piston part (1) which rests sealingly against the cartridge wall and a second piston part (4, 24), which forms a valve (9, 10) together with the first piston part (1). Said valve opens when a pressure is exerted on the rear side of the piston so that the air that is trapped between the filling composition and the piston can escape. According to the invention, a filter section (14) is provided in front of the valve (9, 10), between the two piston parts (1; 4, 24), as seen from the flow path of the air through the valve (9, 10). This filter section has at least one narrow channel which forms a penetration barrier for the filling mass and ensures that the valve remains dry and free of dirt.

Description

Entlüftungsvorrichtung bei einem Kolben für eine Kartusche Bleeding device for a piston for a cartridge
Die Neuerung betrifft eine Entlüftungsvorrichtung bei einem Kolben für eine Kartusche nach dem Oberbegriff des Anspruches 1.The innovation relates to a ventilation device in a piston for a cartridge according to the preamble of claim 1.
Nach dem DE GM 298 00 594 ist in eine am Kolben aiigeformte Tasche ein Mikroporenfilter eingesetzt. Über dieses Mikroporenfilter kann die zwischen der Füllmasse und dem Kolben eingeschlossene Luft entweichen, wenn der Kolben in die Kartusche eingesetzt wird. Dieses Mikroporenfilter soll weiterhin einen Austritt der Füllmasse verhindern. Bestandteile bestimmter Füllmassen weisen bei der Lagerung der Kartuschen ein kriechölartiges Verhalten auf. Diese Bestandteile durchwandern das Mikroporenfilter, womit es zu Leckagen kommt.According to DE GM 298 00 594, a micropore filter is inserted into a pocket shaped on the piston. The air trapped between the filling compound and the piston can escape through this micro-pore filter when the piston is inserted into the cartridge. This micropore filter is also intended to prevent the filling compound from escaping. Components of certain filling compounds have a creeping oil-like behavior when the cartridges are stored. These components pass through the micropore filter, which leads to leakages.
Eine weitere Entlüftungsvorrichtung zeigt das DE GM 295 06 800. Die Entlüftung wird hierbei über mehrere, auf einem Teilkreis der Kolbenabdeckung angebrachte Ventilzapfen vorgenommen, welche beim Eindrücken des Kolbens in die Kartusche von Nentilkonen abgehoben werden und dadurch den Luftauslaß ermöglichen. Diese Entlüftungsvorrichtung ist jedoch nur mit engen Fertigungstoleranzen herstellbar. Ein weiterer Nachteil ist darin zu sehen, daß Teile der Füllmasse bis zu den Ventilen vordringen können, die hierdurch verschmutzen, so daß ihre Dichtfunktion beeinträchtigt wird.Another venting device is shown in DE GM 295 06 800. The venting is carried out here via a plurality of valve pins attached to a part circle of the piston cover, which are lifted off by nentil cones when the piston is pressed into the cartridge and thereby enable the air outlet. However, this venting device can only be produced with narrow manufacturing tolerances. Another disadvantage is the fact that parts of the filling compound can penetrate up to the valves, which thereby contaminate them, so that their sealing function is impaired.
Ausgehend von dieser Entlüftungsvorrichtung stellt sich die Aufgabe, diese so auszubilden, daß das Ventil trocken und frei von Verschmutzungen bleibt. Kriechölartige Bestandteile der Füllmassen sollen vom Ventil am Austreten gehindert werden.Starting from this venting device, the task is to design it in such a way that the valve remains dry and free of dirt. The valve should prevent creeping oil-like constituents from escaping.
Gelöst wird diese Aufgabe mit den Merkmalen des Anspruches 1. Vorteilhafte Ausgestaltungen sind den Unteransprüchen entnehmbar.This object is achieved with the features of claim 1. Advantageous refinements can be found in the subclaims.
Ausfuhrungsbeispiele werden nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:Exemplary embodiments are explained in more detail below with reference to the drawings. Show it:
Figur 1: einen Schnitt durch eine erste Ausf hrungsform eines Kolbens; Figur 2: einen Schnitt durch einen Ringkolben mit der Entlüftungsvorrichtung nach1 shows a section through a first embodiment of a piston; Figure 2 shows a section through an annular piston with the ventilation device
Figur 1 ;Figure 1;
Figur 3: einen Schnitt durch eine zweite Ausführungsform eines Kolbens bei geschlossener Entlüftungsvorrichtung;FIG. 3 shows a section through a second embodiment of a piston with the ventilation device closed;
Figur 4: einen Schnitt durch den Kolben der Figur 3 bei geöffneterFigure 4 shows a section through the piston of Figure 3 with the open
Entlüftungsvorrichtung und .Venting device and.
Figur 5: einen Schnitt durch eine dritte Ausfuhrungsform eines Kolbens.Figure 5: a section through a third embodiment of a piston.
Der Kolben nach Figur 1 weist ein erstes Kolbenteil 1 auf, das mit einer Dichtlippe 2 versehen ist, welche zur Anlage an die Kartuschenwand kommt. Dieses Kolbenteil 1 weist eine kreiszylindrische Vertiefung 3 auf. Der Kolben weist weiterhin ein zweites Kolbenteil 4 auf. Dieses Kolbenteil 4 besitzt ein kreiszylindrisches Wandungsteil 5, das am Grund der Vertiefung 3 mit dem ersten Kolbenteil 1 verrastet ist. Die Rastverbindung ist mit 6 bezeichnet. Das kreiszylindrische Wandungsteil 5 geht bogenförmig in einen Ventilzapfen 7 über. Dieser Ventilzapfen 7 durchdringt eine zylindrische Bohrung 11 am ersten Kolbenteil 1 und weist einen Ventilkegel 9 auf, der zur Anlage an eine Ventillippe 10 des ersten Kolbenteils 1 kommt. Der bogenförmige Übergangsbereich 8 übergreift die zylindrische Wand 12 zwischen der Bohrung 11 und der Vertiefung 3.The piston according to FIG. 1 has a first piston part 1, which is provided with a sealing lip 2, which comes into contact with the cartridge wall. This piston part 1 has a circular cylindrical recess 3. The piston also has a second piston part 4. This piston part 4 has a circular cylindrical wall part 5, which is locked at the bottom of the recess 3 with the first piston part 1. The snap connection is designated 6. The circular cylindrical wall part 5 merges into a valve pin 7 in an arc shape. This valve pin 7 penetrates a cylindrical bore 11 on the first piston part 1 and has a valve cone 9 which comes into contact with a valve lip 10 of the first piston part 1. The arcuate transition region 8 engages over the cylindrical wall 12 between the bore 11 and the depression 3.
Die Verrastung 6 ist durch einen kleinen Luftkanal 13 unterbrochen. Zwischen der Außenseite der Wand 12 und der Innenseite des -kreiszylindrischen Wandungsteils 5 wird eine Filterstrecke 14 gebildet. Diese Filterstrecke 14 besteht aus engen Kanälen an der Innenwand des Wandungsteils 5.The latching 6 is interrupted by a small air duct 13. A filter section 14 is formed between the outside of the wall 12 and the inside of the circular-cylindrical wall part 5. This filter section 14 consists of narrow channels on the inner wall of the wall part 5.
Der bogenförmige Übergangsbereich 8 bewirkt, daß der Ventilzapfen 7 gegen die Kolbenrückseite gedrückt wird.The arcuate transition area 8 causes the valve pin 7 to be pressed against the piston rear side.
Wird der Kolben durch ein Werkzeug in eine Kartusche eingesetzt, dann wird der Ventilzapfen 7 nach oben bewegt, wodurch das von den Teilen 9, 10 gebildete Ventil geöffnet wird. Die zwischen der Füllmasse und dem Kolben eingeschlossene Luft entweicht über die Vertiefung 3, den Kanal 13 und die Filterstrecke 14 und tritt über das Ventil 9, 10 aus. Wird der Kolben gegen die Füllmasse gedrückt, dann kann diese wohl über den Kanal 13 gelangen, nicht jedoch durch die Filterstrecke 14. Auf diese Weise wird verhindert, daß Füllmasse bis zum Ventil 9, 10 gelangt. Bei Füllmassen, die kriechölartige Bestandteile absondern, ist es wohl möglich, daß diese die Filterstrecke 14 überwinden, jedoch wird ihr Austritt durch das Ventil 9, 10 verhindert.If the piston is inserted into a cartridge by a tool, the valve pin 7 is moved upward, whereby the valve formed by the parts 9, 10 is opened. The air enclosed between the filling compound and the piston escapes via the recess 3, the channel 13 and the filter section 14 and exits via the valve 9, 10. Becomes the piston is pressed against the filling compound, then this can probably pass through the channel 13, but not through the filter section 14. This prevents the filling compound from reaching the valve 9, 10. In the case of filling compounds which secrete creeping oil-like constituents, it is possible that they overcome the filter section 14, but their escape is prevented by the valve 9, 10.
Gemäß Figur 2 ist das Filterventil nach Figur 1 in einen Ringkolben 15 integriert. Dieser Ringkolben wird durch eine Abdeckscheibe 16 abgedeckt, die aus einem Kunststoffmaterial besteht, das von der Füllmasse nicht angegriffen wird. Diese Abdeckscheibe weist mindestens eine Entlüftungsbohrung 17 und/oder einen Entlüftungskanal 18 auf, über welche die zwischen dem Kolben und der Füllmasse eingeschlossene Luft zum Filterventil entweichen kann.According to FIG. 2, the filter valve according to FIG. 1 is integrated in an annular piston 15. This ring piston is covered by a cover disk 16, which consists of a plastic material that is not attacked by the filling compound. This cover plate has at least one ventilation hole 17 and / or a ventilation channel 18, via which the air trapped between the piston and the filling compound can escape to the filter valve.
Die Ausführungsform nach den Figuren 3 und 4 unterscheidet sich von derjenigen nach der Figur 1 in erster Linie dadurch, daß anstelle des bogenförmigen Übergangsbereichs 8 nunmehr ein scheibenförmiger Übergangsbereich 19 vorhanden ist. Dieser weist bevorzugt konzentrische Wellen 20 auf. Dieser scheibenförmige Übergangsbereich 19 weist eine Federfunktion auf, die bewirkt, daß der Ventilkegel 9 gegen die Ventillippe 10 gedrückt wird. Während bei der Ausfuhrungsform nach Figur 1 die Filterstrecke 14 von einem wendelförmigen Kanal 21 gebildet wird, wird die Filterstrecke 14A nach den Figuren 3 und 4 durch axial verlaufende Rillen 22 gebildet, die am zweiten Kolbenteil 4 angeformt sind. Anstelle axial verlaufender Rillen können auch wendeiförmige Rillen vorgesehen sein.The embodiment according to FIGS. 3 and 4 differs from that according to FIG. 1 primarily in that instead of the curved transition area 8 there is now a disk-shaped transition area 19. This preferably has concentric waves 20. This disc-shaped transition region 19 has a spring function, which causes the valve cone 9 to be pressed against the valve lip 10. 1, the filter section 14 is formed by a helical channel 21, the filter section 14A according to FIGS. 3 and 4 is formed by axially extending grooves 22 which are formed on the second piston part 4. Instead of axially extending grooves, helical grooves can also be provided.
hi Figur 4 wird verdeutlicht, wie ein Kolbensetzwerkzeug 23 gegen den Ventilzapfen 7 anläuft und damit das Ventil 9, 10 öffnet.hi Figure 4 illustrates how a piston setting tool 23 starts against the valve pin 7 and thus the valve 9, 10 opens.
Bei der Ausführungsform nach der Figur 5 ist wiederum eine Abdeckscheibe 16 mit Entlüftungsbohrungen 17 vorhanden. Das erste Kolbenteil 1 weist eine mittige Bohrung 23 auf, in welche das zweite Kolbenteil 24 eingesetzt ist. Zwischen der Bohrung 23 und dem zweiten Kolbenteil 24 wird eine Filterstrecke 14 gebildet. Am unteren Ende des Kolbenteils 24 ist eine Dichtlippe 25 angeformt, die zur Anlage an einen sich verjüngenden Bereich 26 der Bohrung 23 kommt. Die Filterstrecke 14 kann durch umlaufende Kanäle gebildet werden, welche Unterbrechungen zum Durchtritt der Luft zwischen den Kanälen aufweist. Sie kann auch durch Längsrippen gemäß Figur 3 gebildet werden. Bevorzugt wird die Filterstrecke 14 gebildet durch wendeiförmige Gewindegänge. Die Kanäle der Filterstrecke sind nur wenige Zehntel Millimeter dick, so daß Viskosefüllmassen durch diese nicht hindurchtreten können. In the embodiment according to FIG. 5 there is again a cover plate 16 with ventilation bores 17. The first piston part 1 has a central bore 23 into which the second piston part 24 is inserted. A filter section 14 is formed between the bore 23 and the second piston part 24. At the lower end of the piston part 24, a sealing lip 25 is formed, which comes to rest against a tapering region 26 of the bore 23. The filter section 14 can be formed by circumferential channels which have interruptions for the passage of air between the channels. It can also be formed by longitudinal ribs according to FIG. 3. The filter section 14 is preferably formed by helical threads. The channels of the filter section are only a few tenths of a millimeter thick, so that viscose fillings cannot pass through them.

Claims

Ansprüche Expectations
1. Entlüftungsvomchtung bei einem Kolben für eine Kartusche, mit einem ersten Kolbenteil (1), das abdichtend gegen die Kartuschenwand anliegt und mit einem zweiten Kolbenteil (4, 24), das mit dem ersten Kolbenteil (1) ein Ventil (9, 10) bildet, das sich öffnet, wenn ein Druck auf die Kolbenrückseite ausgeübt wird, damit die zwischen der Füllmasse und dem Kolben eingeschlossene Luft entweichen kann, dadurch gekennzeichnet, daß im Strömungsweg der Luft durch das Ventil (9, 10) gesehen, vor dem Ventil (9, 10) zwischen den beiden Kolbenteilen (1; 4, 24) eine Filterstrecke (14) gebildet wird, die mindestens einen engen Kanal aufweist, der eine Durchtrittsbarriere für die Füllmasse bildet.1. Venting device in a piston for a cartridge, with a first piston part (1), which lies sealingly against the cartridge wall and with a second piston part (4, 24), which with the first piston part (1) has a valve (9, 10) forms, which opens when a pressure is exerted on the piston rear so that the air trapped between the filling compound and the piston can escape, characterized in that seen in the flow path of the air through the valve (9, 10), in front of the valve ( 9, 10) between the two piston parts (1; 4, 24) a filter section (14) is formed, which has at least one narrow channel, which forms a passage barrier for the filling compound.
2. Entlüftungs Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Ventil (9, 10) und die Filterstrecke (14) konzentrisch zueinander angeordnet sind.2. Venting device according to claim 1, characterized in that the valve (9, 10) and the filter section (14) are arranged concentrically to one another.
3. Entlüftungsvorrichtung nach Ansprach 1 oder 2, dadurch gekennzeichnet, daß der Außenumfang des zweiten Kolbenteils (4) mit dem ersten Kolbenteil (1) verrastet ist, die Verrastung (6) durch einen Luftkanal (13) unterbrochen ist und an die Verrastung (6) sich die Filterstrecke (14) anschließt.3. Ventilation device according spoke 1 or 2, characterized in that the outer circumference of the second piston part (4) with the first piston part (1) is locked, the locking (6) is interrupted by an air channel (13) and to the locking (6 ) the filter section (14) connects.
4. Entlüftungsvorrichtung nach Ansprach 3, dadurch gekennzeichnet, daß das zweiten Kolbenteil (4) einen sich zur Kolbenrückseite verjüngenden Ventilkegel (9) aufweist, der bei verrastetem zweiten Kolbenteil (4) durch dieses gegen eine Ventillippe (10) am ersten Kolbenteil (1) gedrückt wird.4. Venting device according to spoke 3, characterized in that the second piston part (4) has a tapering towards the rear of the valve cone (9) which, when the second piston part (4) is locked, against a valve lip (10) on the first piston part (1). is pressed.
5. Entlüftungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das erste Kolbenteil (1) eine kreiszylindrische Vertiefung (3) aufweist, in welche ein kreiszylindrisches Wandungsteil (5) des zweiten Kolbenteils (4) eingreift, welches mittig in einem den Ventilkegel (9) aufweisenden Ventilzapfen (7) übergeht. 5. Venting device according to claim 4, characterized in that the first piston part (1) has a circular cylindrical recess (3) into which a circular cylindrical wall part (5) of the second piston part (4) engages, which in the middle in a valve cone (9) having valve pin (7) passes.
6. Entlüftungsvomchtung nach Ansprach 5, dadurch gekennzeichnet, daß die6. venting device according spoke 5, characterized in that the
Filterstrecke (14) zwischen einer Wand der Vertiefung (3) und einer Wand des Wandungsteils (5) gebildet wird.Filter section (14) is formed between a wall of the recess (3) and a wall of the wall part (5).
7. Entlüftungsvomchtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß das kreiszylindrische Wandungsteil (5) bogenförmig in den Ventilzapfen (7) übergeht und dieser bogenförmige Übergangsbereich (8) den Ventilzapfen (7) in Richtung der Kolbenrückseite drückt.7. Venting device according to claim 5 or 6, characterized in that the circular cylindrical wall part (5) merges into the valve pin (7) in an arc and this arcuate transition region (8) presses the valve pin (7) in the direction of the piston rear.
8. Entlüftui gsvorrichtung nach Ansprach 5 oder 6, dadurch gekennzeichnet, daß das kreiszylindrische Wandungsteil (5) scheibenförmig in den Ventilzapfen (7) übergeht, dieser scheibenförmige Übergangsbereich (19) bevorzugt konzentrisch wellenförmig gestaltet ist und den Ventilzapfen (7) in Richtung der Kolbenrückseite drückt.8. Ventilation device according to spoke 5 or 6, characterized in that the circular cylindrical wall part (5) merges into the valve pin (7) in the form of a disk, this disk-shaped transition region (19) is preferably of a concentrically undulating design and the valve pin (7) in the direction of the piston rear suppressed.
9. Entlüftungsvorrichtung nach Ansprach 1 oder 2, dadurch gekennzeichnet, daß das erste Kolbenteil (1) eine -kreiszylindrische Bohrung (23) aufweist, in welche das zweite Kolbenteil (24) eingesetzt ist, das kolbenrückseitig eine Ventillippe (25) aufweist, die zur Anlage an einen sich verjüngenden Bereich (26) der Bohrung (23) kommt.9. Ventilation device according spoke 1 or 2, characterized in that the first piston part (1) has a circular-circular bore (23) into which the second piston part (24) is inserted, which has a valve lip (25) on the back of the piston, which for It comes into contact with a tapered area (26) of the bore (23).
10. Entlüftungsvomchtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Filterstrecke (14) durch umlaufende, Unterbrechungen aufweisende Kanäle gebildet wird.10. venting device according to one of claims 1 to 9, characterized in that the filter section (14) is formed by circumferential, intermittent channels.
11. Entlüftungsvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Filterstrecke (14) durch Längsrippen gebildet wird.11. Venting device according to one of claims 1 to 9, characterized in that the filter section (14) is formed by longitudinal ribs.
12. Entlüftungsvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Filterstrecke (14) durch Gewindegänge gebildet wird.12. Venting device according to one of claims 1 to 9, characterized in that the filter section (14) is formed by threads.
13. Entlüftungsvorrichtung nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß die Kanäle wenige Zehntel Millimeter dick sind. Entlüftungsvorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß das erste Kolbenteil (1) an seiner der Füllmasse zugewandten Oberseite durch eine Bohrungen (17) aufweisende Abdeckscheibe (16) abgedeckt ist. 13. Venting device according to one of claims 10 to 12, characterized in that the channels are a few tenths of a millimeter thick. Venting device according to one of claims 1 to 13, characterized in that the first piston part (1) is covered on its upper side facing the filling compound by a cover disk (16) having bores (17).
EP01913897A 2000-06-09 2001-03-21 Ventilation device for a piston for a cartridge Expired - Lifetime EP1207969B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20010417U DE20010417U1 (en) 2000-06-09 2000-06-09 Bleeding device for a piston for a cartridge
DE20010417U 2000-06-09
PCT/EP2001/003221 WO2001094028A1 (en) 2000-06-09 2001-03-21 Ventilation device for a piston for a cartridge

Publications (3)

Publication Number Publication Date
EP1207969A1 true EP1207969A1 (en) 2002-05-29
EP1207969B1 EP1207969B1 (en) 2004-12-29
EP1207969B2 EP1207969B2 (en) 2007-07-04

Family

ID=7942724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01913897A Expired - Lifetime EP1207969B2 (en) 2000-06-09 2001-03-21 Ventilation device for a piston for a cartridge

Country Status (4)

Country Link
US (1) US6598766B1 (en)
EP (1) EP1207969B2 (en)
DE (2) DE20010417U1 (en)
WO (1) WO2001094028A1 (en)

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Also Published As

Publication number Publication date
EP1207969B2 (en) 2007-07-04
US6598766B1 (en) 2003-07-29
DE20010417U1 (en) 2001-10-11
EP1207969B1 (en) 2004-12-29
WO2001094028A1 (en) 2001-12-13
DE50104959D1 (en) 2005-02-03

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