EP3608029B1 - Cartridge piston with centering aid - Google Patents

Cartridge piston with centering aid Download PDF

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Publication number
EP3608029B1
EP3608029B1 EP19000324.4A EP19000324A EP3608029B1 EP 3608029 B1 EP3608029 B1 EP 3608029B1 EP 19000324 A EP19000324 A EP 19000324A EP 3608029 B1 EP3608029 B1 EP 3608029B1
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EP
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Prior art keywords
ribs
piston
wall
sealing lip
cartridge
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EP19000324.4A
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German (de)
French (fr)
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EP3608029A1 (en
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Frank Ritter
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Ritter GmbH
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Ritter GmbH
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    • 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 invention relates to a cartridge plunger formed with an improved centering aid formation to facilitate centering of the plunger during insertion into the rear end of a cartridge.
  • the document DE 91 10 529 U1 shows a prior art cartridge plunger.
  • the insertion of cartridge plungers into cartridges filled with the filling compound is done by mechanically inserting the plunger into the rear end of the cartridge.
  • pistons are fed into the piston setting machine and then each pushed axially into the rear end of a cartridge filled with filling compound. It is important that the piston, which inevitably has a certain, albeit small, movement play so that it can be fed into the piston setting machine without problems, is centered in the rear end of the cartridge in the initial phase of the insertion process. There is a risk here that the piston can tilt when it initially comes into contact with the cartridge wall on one side.
  • the object of the invention is to design a cartridge piston in such a way that optimal centering and the best possible protection of the sealing lip during the setting process can take place without impairing its other functions.
  • the top wall is axially stepped near the transition into the peripheral wall and has a ring of radial Provide ribs whose forward-pointing edges continue the contour of the top wall and project slightly radially beyond the peripheral wall.
  • the radial ribs serve as centering ribs and are arranged axially in front of the sealing lip that extends obliquely outwards from the jacket wall and have a radial extension that ends in front of the sealing lip, so that the sealing lip can be used optimally.
  • the radial ribs are angularly spaced relatively closely from one another, preferably no more than 30° angularly, and preferably from 20° to 15° angularly.
  • the radial ribs are located axially in front of the sealing lip arranged on the jacket wall and extending forward, the axial height of the ribs results in a sufficient axial distance between the front end of the piston and the front end of the sealing lip, so that the pre-centering by the ribs at inserting the piston, have centered the piston before the axially following sealing lip comes into contact with the insertion bevel of the cartridge. Because the first contact with the sealing lip, which is thin because of the necessary flexibility and therefore sensitive, only occurs when the piston is already centered, the risk of damage to the sealing lip due to one-sided loads in interaction with the cartridge wall is greatly reduced. Since the ribs are located axially in front of the sealing lip, the sealing lip has unhindered radial mobility over the entire circumference of the piston, despite a certain radial overhang of the ribs over the jacket wall of the piston.
  • FIG. 1 and 2 The drawings show the piston according to the invention, which has a cover wall 1 that is slightly curved forwards in the usual way and a jacket wall 2 that adjoins it at the rear at the circumference. Approximately in the middle of the axial extent of the casing wall 2 is arranged on it via a connecting attachment 3 a forward-pointing and slightly outwardly inclined sealing lip 4, which also has a leg 5 running backwards from the connecting attachment 3 and slightly obliquely outwards. The rear portion of the peripheral wall 2 of the piston flares slightly outwards.
  • the top wall 1 of the piston has an axial gradation 6 in the region of its circumference, as can be seen in the left half of FIG 2 clearly sees.
  • a ring of radial ribs 7 is arranged on this gradation 6, the forward-pointing edges of which harmoniously continue the contour of the area of the top wall 1 lying radially inside the gradation 6, and which extend radially slightly over the circumference of the casing wall 6 in the area axially in front of the connecting attachment 3 protrude and also continue axially along this jacket wall area by a short distance to the rear.
  • these ribs have 7 mutual angular distances of 15 °.
  • the angular spacing of the ribs 7 should therefore not be less than 30°.
  • the numerous ribs mean that the piston has a very high level of rigidity locally in the area of the top wall circumference, and thus in the connection area between top wall 1 and casing wall 2, which in turn significantly promotes pre-centering during insertion and prevents deformation of the piston when unsymmetrical application forces occur , which could otherwise lead to jamming.
  • the ribs 7 have a relatively large axial extent, and the sealing lip 4 is located axially behind these ribs 7.
  • the above-mentioned effect occurs that when the piston is inserted, pre-centering can take place over a relatively large axial distance and the Piston is already very well centered in the rear end of the cartridge before the front end of the sealing lip 4 can come into contact with the cartridge wall for the first time.
  • the radial centering ribs 7 end radially in front of the sealing lip, so that they can be used without hindrance and has an unimpeded radial freedom of movement in order to be able to interact with the cartridge wall in an optimal sealing manner in any position and also in the event of any irregularities.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

Die Erfindung betrifft einen Kartuschenkolben, der mit einer als verbesserte Zentrierhilfe ausgebildeten Formation ausgebildet ist, um das Zentrieren des Kolbens beim Einführen in das hintere Ende einer Kartusche zu erleichtern. Das Dokument DE 91 10 529 U1 zeigt einen Kartuschenkolben nach dem Stand der Technik.The invention relates to a cartridge plunger formed with an improved centering aid formation to facilitate centering of the plunger during insertion into the rear end of a cartridge. The document DE 91 10 529 U1 shows a prior art cartridge plunger.

Das Setzen von Kartuschenkolben in mit der Füllmasse befüllten Kartuschen erfolgt durch maschinelles Einsetzen des Kolbens in das hintere Ende der Kartusche. Dabei werden Kolben in die Kolbensetzmaschine zugeführt und von dieser dann jeweils axial in das hintere Ende einer mit Füllmasse gefüllten Kartusche eingeschoben. Dabei ist es wichtig, dass der Kolben, der unvermeidlich ein gewisses, wenn auch geringes Bewegungsspiel hat, damit sein Zuführen in die Kolbensetzmaschine störungsfrei gelingt, in der Anfangsphase des Einführvorgangs in das hintere Kartuschenende zentriert wird. Hierbei besteht die Gefahr, dass der Kolben, wenn er zunächst einseitig mit der Kartuschenwand in Berührung kommt, verkanten kann. Dies kann zur Beschädigung der dünnen und deshalb empfindlichen Dichtlippe am Kolbenumfang führen, mit der Folge, dass der Kolben dann das hintere Kartuschenende nicht mehr zuverlässig abgedichtet, und dass die Füllmasse durch Luftzutritt verdirbt. Deshalb ist es wichtig, dass der Kolben bestmöglich zentriert in das hintere Kartuschenende eingeführt wird, um ein Verkanten beim Einführen zu vermeiden und sicherzustellen, dass die Kolbenumfang angeordnete Dichtlippe beim Einsetzen nicht beschädigt wird, keine Verformung des Kolbens erfolgt und der Kolben somit nach dem Setzen das hintere Ende der Kartusche zuverlässig dicht verschließt.The insertion of cartridge plungers into cartridges filled with the filling compound is done by mechanically inserting the plunger into the rear end of the cartridge. In this case, pistons are fed into the piston setting machine and then each pushed axially into the rear end of a cartridge filled with filling compound. It is important that the piston, which inevitably has a certain, albeit small, movement play so that it can be fed into the piston setting machine without problems, is centered in the rear end of the cartridge in the initial phase of the insertion process. There is a risk here that the piston can tilt when it initially comes into contact with the cartridge wall on one side. This can lead to damage to the thin and therefore sensitive sealing lip on the circumference of the piston, with the result that the piston then no longer reliably seals the rear end of the cartridge and the filling compound spoils due to the ingress of air. It is therefore important that the plunger is inserted as centered as possible in the rear end of the cartridge to avoid tilting when inserting it and to ensure that the sealing lip around the plunger is not damaged when it is inserted, and that the plunger is not deformed and the plunger is not deformed after it has been seated seals the rear end of the cartridge reliably and tightly.

Aufgabe der Erfindung ist es, einen Kartuschenkolben so zu gestalten, dass ohne Beeinträchtigung seiner übrigen Funktionen eine optimale Zentrierung und ein bestmöglicher Schutz der Dichtlippe beim Setzvorgang stattfinden kann.The object of the invention is to design a cartridge piston in such a way that optimal centering and the best possible protection of the sealing lip during the setting process can take place without impairing its other functions.

Diese Aufgabe wird gemäß der Erfindung durch die im Anspruch 1 angeordnete Anordnung gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved according to the invention by the arrangement set out in claim 1. Advantageous configurations of the invention are the subject matter of the dependent claims.

Erfindungsgemäß ist bei einem Kolben, der eine vordere Deckwand, eine sich daran anschließende und nach hinten erstreckende Umfangswand, und eine an der Umfangswand angeordnete, nach vorne ragende Dichtlippe aufweist, die Deckwand nahe dem Übergang in die Umfangswand axial abgestuft und mit einem Kranz von radialen Rippen versehen, deren nach vorne weisende Kanten die Kontur der Deckwand fortsetzen, und die radial leicht über die Umfangswand vorstehen. Die radialen Rippen dienen als Zentrierrippen und sind axial vorderhalb der sich von der Mantelwand aus nach vorne schräg auswärts erstreckenden Dichtlippe angeordnet und haben eine radiale Ausdehnung, die vor der Dichtlippe endet, so dass sie Dichtlippe optimal zum Einsatz kommen kann.According to the invention, in a piston which has a front top wall, an adjoining and rearwardly extending peripheral wall, and a sealing lip arranged on the peripheral wall and protruding forward, the top wall is axially stepped near the transition into the peripheral wall and has a ring of radial Provide ribs whose forward-pointing edges continue the contour of the top wall and project slightly radially beyond the peripheral wall. The radial ribs serve as centering ribs and are arranged axially in front of the sealing lip that extends obliquely outwards from the jacket wall and have a radial extension that ends in front of the sealing lip, so that the sealing lip can be used optimally.

Die radialen Rippen sind mit relativ kleinen Winkelabständen voneinander angeordnet, vorzugsweise mit Winkelabständen von nicht mehr als 30°, und dabei vorzugsweise mit Winkelabständen von 20° bis 15°.The radial ribs are angularly spaced relatively closely from one another, preferably no more than 30° angularly, and preferably from 20° to 15° angularly.

Durch die aufgrund der relativ kleinen Winkelabstände relativ große Anzahl radialer Rippen am vorderen Kolbenumfang erfolgt beim Setzen des Kolbens eine sehr gute Vorzentrierung an einer Vielzahl von gleichmäßig über den Umfang verteilten Stellen im Zusammenwirken mit der üblicherweise am hinteren Kartuschenende vorgesehenen Einfuhrschräge. Dabei ist wegen der nur punktuellen Berührung der einzelnen Rippen mit der Kartuschenwand der bei dieser Berührung auftretende Reibungswiderstand nur gering, andererseits aber durch den Rippenkranz die Steifigkeit des Umfangsbereichs der Deckwand am Übergang zur Mantelwand sehr hoch, was eine entsprechend geringe Verkantungsneigung bedingt. Dies steht im Gegensatz zu herkömmlichen Kolben, bei denen ein geschlossener Deckwandumfang am vorderen Kolbenende beim Setzen mit der Einführschräge der Kartusche in Berührung kommt, wo bei nicht exakt zentrischem Einführen eine hohe einseitige Reibung zwischen Kolben und Kartusche auftritt und durch Kippen des Kolbens um diese einseitige Reibungslinie ein Verkanten des Kolbens und ein Verformen beim Einsetzen begünstigt wird. Andererseits sorgen die zahlreichen Rippen bei dem erfindungsgemäßen Kolben im Gegensatz zu Ausführungsformen, die Rippen nur in größeren Abständen am vorderen Kolbenende vorsehen, für eine über den ganzen Umfang gleichmäßig wirkende Vorzentrierung. Da die Rippen an ihrer Vorderseite exakt die Deckwandkontur fortsetzen, was durch die axiale Abstufung der Deckwand am Kolbenumfang möglich ist, hat der Kolben keine störenden axialen Überstände nach vorne.Due to the relatively large number of radial ribs on the front circumference of the piston due to the relatively small angular distances, a very good pre-centering occurs when the piston is set at a large number of points distributed evenly over the circumference in cooperation with the insertion bevel usually provided at the rear end of the cartridge. Due to the fact that the individual ribs only come into contact with the cartridge wall at certain points, the frictional resistance that occurs during this contact is only low, but on the other hand the rigidity of the peripheral region of the top wall at the transition to the casing wall is very high due to the rim of ribs, which causes a correspondingly low tendency to tilt. This is in contrast to conventional pistons, in which a closed cover wall circumference at the front end of the piston comes into contact with the insertion bevel of the cartridge when it is set, where a high one-sided Friction between the piston and cartridge occurs and tilting of the piston around this one-sided friction line canting of the piston and deformation during insertion is favored. On the other hand, the numerous ribs in the piston according to the invention, in contrast to embodiments which only provide ribs at larger intervals at the front end of the piston, ensure a pre-centering which acts uniformly over the entire circumference. Since the front of the ribs exactly continues the cover wall contour, which is possible due to the axial gradation of the cover wall on the piston circumference, the piston does not have any disturbing axial protrusions towards the front.

Da die radialen Rippen sich axial vorderhalb der an der Mantelwand angeordneten, sich nach vorne erstreckenden Dichtlippe befinden, ergibt sich durch die axiale Höhe der Rippen eine ausreichende axiale Distanz zwischen dem vorderen Kolbenende und dem vorderen Ende der Dichtlippe, damit die Vorzentrierung durch die Rippen beim Einsetzen des Kolbens den Kolben zentriert haben, bevor die axial nachfolgende Dichtlippe mit der Einführschräge der Kartusche in Berührung kommt. Weil im Zeitpunkt der ersten Berührung der wegen der notwendigen Flexibilität dünnen und daher empfindlichen Dichtlippe erst erfolgt, wenn der Kolben bereits zentriert ist, ist die Gefahr einer Beschädigung der Dichtlippe durch einseitige Belastungen im Zusammenwirken mit der Kartuschenwand stark reduziert. Da die Rippen sich axial vorderhalb der Dichtlippe befinden, hat die Dichtlippe trotz eines gewissen radialen Überstands der Rippen über die Mantelwand des Kolbens über den gesamten Kolbenumfang eine ungehinderte radiale Beweglichkeit.Since the radial ribs are located axially in front of the sealing lip arranged on the jacket wall and extending forward, the axial height of the ribs results in a sufficient axial distance between the front end of the piston and the front end of the sealing lip, so that the pre-centering by the ribs at inserting the piston, have centered the piston before the axially following sealing lip comes into contact with the insertion bevel of the cartridge. Because the first contact with the sealing lip, which is thin because of the necessary flexibility and therefore sensitive, only occurs when the piston is already centered, the risk of damage to the sealing lip due to one-sided loads in interaction with the cartridge wall is greatly reduced. Since the ribs are located axially in front of the sealing lip, the sealing lip has unhindered radial mobility over the entire circumference of the piston, despite a certain radial overhang of the ribs over the jacket wall of the piston.

Ein Ausführungsbeispiel der Erfindung wird nachstehend unter Bezugnahme auf die anliegenden Zeichnungen näher beschrieben, in denen zeigt:

Fig. 1
eine Draufsicht des Kolbens nach der Erfindung, und
Fig. 2
eine den Kolben in der linken Hälfte in der Seitenansicht und in der rechten Hälfte im Schnitt zeigende Darstellung.
An embodiment of the invention is described in more detail below with reference to the accompanying drawings, in which shows:
1
a plan view of the piston according to the invention, and
2
a representation showing the piston in the left half in side view and in the right half in section.

Die Fig. 1 und 2 der Zeichnungen zeigen den erfindungsgemäßen Kolben, der eine in üblicher Weise leicht nach vorne gewölbte Deckwand 1 und eine sich daran am Umfang rückwärts anschließende Mantelwand 2 aufweist. Etwa in der Mitte der axialen Ausdehnung der Mantelwand 2 ist daran über einen Verbindungsansatz 3 eine nach vorne weisende und leicht auswärts geneigte Dichtlippe 4 angeordnet, die auch einen vom Verbindungsansatz 3 aus nach rückwärts und leicht schräg auswärts verlaufenden Schenkel 5 aufweist. Der rückwärtige Bereich der Umfangswand 2 des Kolbens erweitert sich leicht nach außen.the Figures 1 and 2 The drawings show the piston according to the invention, which has a cover wall 1 that is slightly curved forwards in the usual way and a jacket wall 2 that adjoins it at the rear at the circumference. Approximately in the middle of the axial extent of the casing wall 2 is arranged on it via a connecting attachment 3 a forward-pointing and slightly outwardly inclined sealing lip 4, which also has a leg 5 running backwards from the connecting attachment 3 and slightly obliquely outwards. The rear portion of the peripheral wall 2 of the piston flares slightly outwards.

Die Deckwand 1 des Kolbens hat im Bereich ihres Umfangs eine axiale Abstufung 6, wie man in der linken Hälfte der Fig. 2 deutlich sieht. Auf dieser Abstufung 6 ist ein Kranz radialer Rippen 7 angeordnet, deren nach vorne weisende Kanten die Kontur des radial innerhalb der Abstufung 6 liegenden Bereichs der Deckwand 1 harmonisch fortsetzen, und die radial etwas über den Umfang der Mantelwand 6 in deren Bereich axial vorderhalb des Verbindungsansatzes 3 überstehen und sich auch entlang dieses Mantelwandbereichs axial noch um eine kurze Distanz nach hinten fortsetzen.The top wall 1 of the piston has an axial gradation 6 in the region of its circumference, as can be seen in the left half of FIG 2 clearly sees. A ring of radial ribs 7 is arranged on this gradation 6, the forward-pointing edges of which harmoniously continue the contour of the area of the top wall 1 lying radially inside the gradation 6, and which extend radially slightly over the circumference of the casing wall 6 in the area axially in front of the connecting attachment 3 protrude and also continue axially along this jacket wall area by a short distance to the rear.

Beim Ausführungsbeispiel haben diese Rippen 7 gegenseitige Winkelabstände von 15°. Wie schon gesagt, ist es für eine gute Vorzentrierung von Bedeutung, dass diese Rippen 7 relativ kleine und gleichmäßige Winkelabstände voneinander haben und daher relativ zahlreich sind, so dass an einer Vielzahl von gleichmäßig, nämlich drehsymmetrisch, über den Umfang verteilten Punkten eine effektive Vorzentrierung beim Einsetzen des Kolbens in das hintere Ende einer Kartusche erfolgen kann. Die Winkelabstände der Rippen 7 sollten daher nicht weniger als 30° betragen. Die zahlreichen Rippen führen dazu, dass der Kolben lokal im Bereich des Deckwandumfangs, und somit im Verbindungsbereich zwischen Deckwand 1 und Mantelwand 2, eine sehr hohe Steifigkeit hat, was wiederum die Vorzentrierung beim Einführen erheblich begünstigt und einer Verformung des Kolbens beim Auftreten unsymmetrischer Einsatzkräfte vermeidet, die sonst zu einem Verkanten führen könnten.In the embodiment, these ribs have 7 mutual angular distances of 15 °. As already mentioned, it is important for good pre-centering that these ribs 7 have relatively small and uniform angular distances from one another and are therefore relatively numerous, so that effective pre-centering can be achieved at a large number of points distributed uniformly, namely rotationally symmetrically, over the circumference Insertion of the piston can be done in the rear end of a cartridge. The angular spacing of the ribs 7 should therefore not be less than 30°. The numerous ribs mean that the piston has a very high level of rigidity locally in the area of the top wall circumference, and thus in the connection area between top wall 1 and casing wall 2, which in turn significantly promotes pre-centering during insertion and prevents deformation of the piston when unsymmetrical application forces occur , which could otherwise lead to jamming.

Wie man aus Fig. 2 deutlich sieht, haben die Rippen 7 eine relativ große axiale Ausdehnung, und die Dichtlippe 4 befindet sich axial hinterhalb dieser Rippen 7. Dadurch tritt die schon oben genannte Wirkung ein, dass beim Einsetzen des Kolbens eine Vorzentrierung über eine relativ große Axialdistanz erfolgen kann und der Kolben im hinteren Kartuschenende bereits sehr gut zentriert ist, bevor das vordere Ende der Dichtlippe 4 erstmals mit der Kartuschenwand in Berührung kommen kann. Außerdem enden die radialen Zentrierrippen 7 radial vor der Dichtlippe, so dass diese ungehindert zum Einsatz kommen kann und einen ungehinderten radialen Bewegungsspielraum hat, um in jeder Lage und auch bei etwaigen Unrundheiten optimal abdichtend mit der Kartuschenwand zusammenwirken zu können.how to get out 2 clearly sees, the ribs 7 have a relatively large axial extent, and the sealing lip 4 is located axially behind these ribs 7. As a result, the above-mentioned effect occurs that when the piston is inserted, pre-centering can take place over a relatively large axial distance and the Piston is already very well centered in the rear end of the cartridge before the front end of the sealing lip 4 can come into contact with the cartridge wall for the first time. In addition, the radial centering ribs 7 end radially in front of the sealing lip, so that they can be used without hindrance and has an unimpeded radial freedom of movement in order to be able to interact with the cartridge wall in an optimal sealing manner in any position and also in the event of any irregularities.

Claims (7)

  1. A cartridge piston for pressing viscous masses out of a cartridge, with a front cover wall (1), a jacket wall (2) adjoining the periphery thereof and extending backwards, and a flexible sealing lip (4) connected to the jacket wall (2) and protruding forward for sealing against a cartridge wall,
    wherein the cover wall (1) has a step (6) near its periphery that axially protrudes to the rear, and a ring of radial ribs (7) is arranged on that step (6) with small rotationally symmetric angular distances, the forward-facing edges of which follow the contour of the region of the cover wall (1) that is located radially within the step (6) and which slightly protrude radially beyond the front region of the jacket wall (2), and wherein the sealing lip (4) is located axially behind the ribs (7).
  2. The piston according to claim 1, wherein the ribs (7) extend a short distance further axially along the jacket wall (2), starting from the step (6) of the cover wall (1).
  3. The piston according to claim 1 or 2, wherein the ribs (7) terminate with their radial extension before the sealing lip.
  4. The piston according to any one of claims 1 to 3, wherein at least the ribs (7) are spaced apart with angular distances of at most 30°.
  5. The piston according to claim 4, wherein the ribs (7) are arranged with mutual angular distances of 15 to 20°.
  6. The piston according to any one of claims 1 to 5, wherein the sealing lip (4) extends forwardly, starting from a connection lug (3) of the jacket wall (2) that is located approximately in the middle of the axial piston length.
  7. The piston according to claim 6, wherein the sealing lip (4) has a leg (5) that faces backwards from the connection lug (3) and the jacket wall (2) is radially widened in its rear region.
EP19000324.4A 2018-08-07 2019-07-05 Cartridge piston with centering aid Active EP3608029B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202018003641.2U DE202018003641U1 (en) 2018-08-07 2018-08-07 Cartridge piston equipped with centering aid

Publications (2)

Publication Number Publication Date
EP3608029A1 EP3608029A1 (en) 2020-02-12
EP3608029B1 true EP3608029B1 (en) 2022-04-27

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ID=63525315

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Application Number Title Priority Date Filing Date
EP19000324.4A Active EP3608029B1 (en) 2018-08-07 2019-07-05 Cartridge piston with centering aid

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EP (1) EP3608029B1 (en)
DE (1) DE202018003641U1 (en)
PL (1) PL3608029T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108642A1 (en) * 2021-04-07 2022-10-13 Ritter Gmbh Trailing piston with supporting lip

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110529U1 (en) * 1991-08-26 1991-10-10 Prestele, Eugen, 8900 Augsburg, De
DE102010048062B4 (en) * 2010-06-22 2018-08-23 Fischbach Kg Kunststoff-Technik cartridge plunger
DE102011100976A1 (en) * 2011-05-09 2012-11-15 Ritter Gmbh Locking and ejection pistons for plastic mass cartridges and method for inserting such a piston into a cartridge

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EP3608029A1 (en) 2020-02-12
PL3608029T3 (en) 2022-09-19
DE202018003641U1 (en) 2018-08-29

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