EP4093697B1 - Piston, robinet de soutirage et réservoir de boissons - Google Patents

Piston, robinet de soutirage et réservoir de boissons Download PDF

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Publication number
EP4093697B1
EP4093697B1 EP21854742.0A EP21854742A EP4093697B1 EP 4093697 B1 EP4093697 B1 EP 4093697B1 EP 21854742 A EP21854742 A EP 21854742A EP 4093697 B1 EP4093697 B1 EP 4093697B1
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EP
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Prior art keywords
piston
regions
region
web
beer
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EP21854742.0A
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German (de)
English (en)
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EP4093697C0 (fr
EP4093697A1 (fr
Inventor
Catharina SANDER
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Ao Tech Ug Haftungsbeschraenkt
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Ao Tech Ug Haftungsbeschraenkt
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D3/04—Liquid-dispensing taps or cocks adapted to seal and open tapping holes of casks, e.g. for beer
    • B67D3/045—Liquid-dispensing taps or cocks adapted to seal and open tapping holes of casks, e.g. for beer with a closing element having a linear movement, in a direction parallel to the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D3/04—Liquid-dispensing taps or cocks adapted to seal and open tapping holes of casks, e.g. for beer
    • B67D3/047—Liquid-dispensing taps or cocks adapted to seal and open tapping holes of casks, e.g. for beer with a closing element having a rotational movement

Definitions

  • the invention relates to a piston for a tap for removing a beverage from a container, preferably beer from a beer keg, particularly preferably beer from a 5L party beer keg, comprising an inner flow channel, an inlet opening and an outlet opening, the inner Flow channel is formed in the piston and for guiding the beverage from the inlet opening to the outlet opening and wherein the piston has a plurality of webs on an outside.
  • the invention further relates to a tap for removing a drink from a container, preferably beer from a beer keg, particularly preferably beer from a 5L party beer keg, and a corresponding container for a drink.
  • the present invention relates generally to beverage containers, taps and plungers for taps. These are mainly smaller beer kegs, for example so-called party kegs with a capacity of five liters. Such party kegs are well known in practice and are usually made of tinplate. Without limiting generality, the preferred embodiments below are a beer keg or a party beer keg.
  • Beer kegs Five liters of beer are provided in such party kegs. There are such kegs with an integrated CO 2 cartridge for dispensing the beer. Beer kegs in which the beer can be dispensed by gravity, namely through a low-lying, integrated tap, are simpler in construction but also easy to handle. A ventable plug is provided so that air can flow in from above, namely to avoid negative pressure in the barrel. The barrel is ventilated through the opening that the stopper closes.
  • the tap includes a sleeve and a piston arranged in the sleeve.
  • the piston When delivered, the piston is completely housed in the sleeve.
  • the piston To remove the beverage, the piston is partially pulled out of the sleeve into a working position. By rotating the piston about a central axis of the sleeve, the beverage is removed.
  • Another tap which also includes a sleeve and a piston.
  • the piston can in turn be moved within the sleeve between a closed position and a working position.
  • a pivotable outlet head is arranged at the end of the piston facing away from the sleeve. When the outlet head is in a locked position, beverage removal is blocked. After moving the outlet head into a removal position, the beverage can be removed through an inflow opening on the sleeve, an inner flow channel formed in the piston and a removal opening on the outlet head.
  • the present invention is based on the object of designing and developing a piston, a tap and a beverage container of the type mentioned in such a way that the piston can be moved within the sleeve of the tap with as little effort as possible, without sacrificing sufficient stability.
  • the piston in question is characterized in that at least one of the plurality of webs is designed as a stepped web, the at least one stepped web having a plurality of first regions and at least one second region arranged between adjacent first regions, the plurality of first regions being designed for this purpose are to touch a wall of the piston chamber when arranging the piston in a piston chamber, and wherein the at least one second region is designed as a recess relative to the plurality of first regions.
  • the tap in question then comprises a sleeve and a piston according to the invention, the piston being at least partially arranged in a piston space of the sleeve, an inflow opening being formed in the sleeve through which the beverage can flow into the piston space, the first several Areas of the at least one stepped web touch a wall of the piston chamber, while the at least one second area is spaced from the wall of the piston chamber.
  • At least one container wall defines a capacity inside the container, with a tap according to the invention being guided through one of the at least one container walls, which enables a beverage to be removed from the capacity.
  • the piston is redesigned in such a way that the contact area between the piston and the wall of the piston chamber is reduced, but at the same time there are still sufficient points of contact to hold the piston stably in the sleeve.
  • a recess is provided on at least one web on the outside of the piston, which creates at least one area of the web that is spaced from a wall of the piston chamber.
  • the at least one recess also offers the advantage that when the piston moves in the piston chamber, less lubricant is scraped off through the web, which can improve the overall lubricating properties between the piston and the sleeve. This creates a tap in which the piston is easier to move in the sleeve and the piston still sits firmly in the sleeve.
  • this approach according to the invention is implemented in that at least one of the several webs on the outside of the piston is designed as a stepped web.
  • a stepped web has a plurality of first areas and at least one second area, with a second area being arranged between two adjacent first areas. This means that the first and second areas should usually alternate.
  • the plurality of first regions are designed to touch a wall of the piston chamber when the piston is arranged in a piston chamber. Since the at least a second area is each designed as a recess relative to the first areas, the second area is arranged at a distance from this wall of the piston chamber.
  • the total length of the second area(s) relative to the total length of the stepped web is at least as large as the total length of the first areas.
  • the aspect ratio between the first and second regions is at least 1 to 1, particularly preferably at least 1 to 2, most preferably approximately 1 to 3.
  • web generally refers to an external surface structure of the piston.
  • the pistons in question are not made from a solid material, but rather have a structured outside.
  • the inner flow channel which can be surrounded by webs, runs inside the piston.
  • the webs therefore serve to ensure the stability of the piston and - to simplify production - are usually straight.
  • the webs have outer edges which - together with possibly other surfaces - touch a wall of a piston chamber in an assembled state.
  • a piston chamber is formed in a non-moving part of a tap.
  • This non-moving part is usually a sleeve that is guided through a container wall of a beverage container.
  • a "wall of the piston chamber” is usually the wall that delimits the piston chamber in a transverse direction. In the case of a cylindrical piston chamber, this wall is, for example, the lateral surface of the cylinder.
  • a “touch” of the plurality of first regions with the wall of the piston chamber can mean that the plurality of first regions and the wall of the piston chamber are at least partially formed in a form-fitting manner.
  • contact can already occur if the several first areas of the wall come very close and the distance between a first area and the wall is less than one millimeter, preferably less than 0.5 millimeters, particularly preferably less than 0.1 millimeters.
  • a deliberately existing distance between one of the several first areas and the wall can help to further reduce the pull-out forces that must be applied.
  • a first area with a consciously present distance can be useful, for example, in first areas that are arranged close to the outlet opening.
  • a “return” on a stepped bridge can be designed in different ways. It is essential that the recess achieves a distance between a second region and a wall of the piston chamber.
  • the outer edge of the second area can be designed in different ways for this purpose.
  • the outer edge can be straight, straight in sections or curved.
  • the piston or the tap can be manufactured differently and consist of different materials.
  • the piston or the tap is manufactured by injection molding.
  • the plunger or tap may be made of polypropylene, a polymer and/or another plastic. It is also conceivable that the piston and/or the sleeve is made of polypropylene, for example, and a sealant is molded on using a thermoplastic polymer, for example in an overmolding process.
  • the plurality of webs can extend relatively arbitrarily relative to the piston. This includes sloping webs as well as non-rectilinear webs. However, from a production point of view, special ones can occur Extension directions can be advantageous.
  • the plurality of webs extend in a longitudinal direction of the piston and/or in a transverse direction of the piston.
  • the at least one stepped web preferably extends in a longitudinal direction of the piston. This configuration simplifies the design of the injection molds, particularly when producing the piston using injection molding technology.
  • the recesses of at least two of the plurality of second regions are identical.
  • the recesses of at least two of the plurality of second regions are designed differently. In this way, specific requirements for the stepped bridge can be addressed even more flexibly.
  • outward-facing edges of the plurality of first regions lie on a straight line or a circle, wherein in the case of a straight line, the straight line is preferably arranged parallel to a central axis of the piston and wherein in the case of a circle, the circle preferably has a center on the central axis of the piston.
  • an outward-facing edge in the plurality of first regions and an outward-facing edge in which at least one second region are each arranged parallel or coaxial to one another can be achieved, for example, in that the outer edges of the first and second regions are at least partially straight (in the longitudinal direction in the case of a web) or as a circular arc (in the transverse direction in the case of a web).
  • the at least one second region has a transition region at an end facing a first region, an outward-facing edge of the transition region bringing about a preferably continuous transition between adjacent first and second regions, the outward-facing edge of the transition region preferably is inclined at an angle between 30° and 70° relative to a connecting line of the first areas. In this way, continuous transitions can be created, which can further reduce friction between the piston and a wall of the piston chamber.
  • an outward-facing edge between a first area and a second area is rounded. This measure can further reduce friction between the piston and a wall of the piston chamber.
  • an envelope surface around the piston is cylindrical.
  • An envelope surface is formed in that outer edges of the plurality of webs or other parts of the piston are approximated by a geometric figure.
  • a cylindrical envelope surface is particularly suitable if the Piston chamber is cylindrical.
  • the base area of the cylinder is preferably a circle, an ellipse, a hexagon, an octagon or the like. Such envelope surfaces lead to pistons that are easy to construct.
  • the webs have, for example, a width between 5% and 45% of the extent of the piston in a transverse direction of the piston, preferably a width between 15% and 35% of the extent of the piston in a transverse direction of the piston.
  • sufficient material should remain inside the piston to accommodate an internal flow channel.
  • a preferred width of a web between 15% and 35% of the extension of the piston in a transverse direction of the piston can represent a favorable compromise between the opposing objectives.
  • a first web and a second web intersect in a cutting line, wherein the first web and/or the second web is a stepped web and wherein one of the first regions of the stepped web is arranged in the region of the cutting line.
  • This embodiment can be used particularly favorably if the first web extends in the longitudinal direction and the second web extends in the transverse direction.
  • the tap comprises a spout head with a removal opening, the spout head being pivotable between a blocking position and a removal position and the spout head being adapted to the piston in such a way that in the removal position the beverage can flow from the outlet opening to the removal opening .
  • a spout head with a removal opening, the spout head being pivotable between a blocking position and a removal position and the spout head being adapted to the piston in such a way that in the removal position the beverage can flow from the outlet opening to the removal opening .
  • Such an outlet head is, for example, in the one already mentioned WO 2010/069340 A1 described.
  • the piston is designed to be displaceable in the piston chamber between a closed position and a working position in the longitudinal direction of the sleeve, the sleeve and the piston being coordinated with one another in such a way that in the working position the beverage can flow through the inflow opening into the inlet opening. In this way, safe transport of the beverage container can be achieved in the closed position, while reliable removal of the beverage is possible in the working position.
  • the Figures 1 to 3 show various views of an exemplary embodiment of a piston 1 according to the invention for a tap.
  • the piston 1 has an inlet opening 2 and an outlet opening 3 as well as an inner flow channel 4 on which connects the inlet opening 2 and the outlet opening 3 with each other.
  • an inlet-side seal 5 is molded on, which extends over large parts of a long side of the piston 1.
  • an outlet-side seal 6 is molded on, which serves to seal an outlet head, not shown here. This outlet head can be attached to a rotation axis 7 on the piston 1.
  • Webs 8, 8' are arranged around the inner flow channel 4 and extend in the longitudinal direction (webs with reference number 8) or transverse direction (webs with reference number 8') of the piston 1.
  • Webs 8 intersect in the longitudinal direction and webs 8 'intersect in the transverse direction along the cutting line 26.
  • Two of the webs 8 are designed as stepped webs 9, the stepped webs 9 being arranged on opposite sides of the inner flow channel 4.
  • These stepped webs 9 have four first areas 10 and three second areas 11, with the second areas 11 each being arranged between two adjacent first areas 10.
  • An outer edge of the first areas 10 and the second areas 11 is arranged parallel to a central axis 12 of the piston 1.
  • the recesses of the two outer second areas 11 are identical, while the middle second area 11 differs from the two outer second areas, namely has a smaller recess.
  • the stepped webs 9 each have a width of approximately 25% of the extent of the piston 1 in a transverse direction, the width being measured from the approach of the web 9 on the inner flow channel to the outer edge in a first area 10.
  • the second areas 11 have a transition area 13 at the ends that face the adjacent first area 10.
  • the transition region 13 is inclined relative to a connecting line of the first regions 10, namely at an angle of approximately 55 °.
  • the outward-facing edge between a first area 10 and a second area 11 is also rounded to further reduce the friction of the piston 1 in a piston chamber.
  • the piston 1 When assembled, the piston 1 is arranged in a piston chamber 14, which is cylindrical and in Fig. 2 is shown in simplified form in cross section. It can be seen that the first areas 10 touch a wall 15 of the piston chamber 14, while the second areas 11 are spaced from this wall 15. The two left first areas 10 are in direct contact with the wall 15, which can also include a lubricant introduced between the first area 10 and the wall 15. A small distance can be seen between the two right first areas 10 and the wall 15. This configuration makes it easier to pull out the piston 1 from a closed position into a working position. Specifically, this reduces the pull-out forces without affecting the stability of the tap.
  • Fig. 4 shows an exploded view of an exemplary embodiment of a tap 16, which includes a sleeve 17, a piston 1 and an outlet button 18.
  • the sleeve 17 can be inserted into a container wall 19 (shown here in simplified form) of a beverage container.
  • the container wall 19 defines a capacity 20, which is designed to hold a beverage, for example beer.
  • the piston 1 is adapted to the piston chamber 14 in such a way that the piston 1 can be at least partially accommodated in the piston chamber 14 and that the outer edges of the first regions 10 touch a wall of the piston chamber 14.
  • the outlet button 18 is designed to be pivotable via the axis of rotation 7.
  • piston 1 When piston 1 and outlet head 18 are completely pushed into piston chamber 14, piston 1 is in a closed position.
  • a drink contained in the capacity 20 can flow through an inflow opening 21 on the sleeve 17 and the Inlet opening 2 enters the inner flow channel 4 and reaches the outlet opening 3.
  • the outlet button 18 If the outlet button 18 is in a locking position (as in Fig. 4 shown), the drink cannot reach a removal opening 22 on the spout button 18. If the outlet button 18 is pivoted downwards about the axis of rotation 7 into a removal position, the drink passes from the outlet opening 3 to the removal opening 22 and can thus be removed from the capacity 20 of the beverage container.
  • a freshness seal 23 can also be seen, which includes a button 24 and a connecting web 25.
  • the button 24 is not reversibly inserted into an associated receptacle (not shown) in the outlet button 18.
  • the piston 1 can only be brought from the closed position into the working position by destroying the connecting web 25, whereby opening of the beverage container can be easily recognized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Closures For Containers (AREA)

Claims (15)

  1. Piston pour un robinet de soutirage pour le soutirage d'une boisson dans un récipient, de préférence de bière dans un fût de bière, plus particulièrement de préférence de bière dans un fût de bière pour événements festifs de 5 I, comprenant un canal d'écoulement interne (4), une ouverture d'entrée (2) et une ouverture de sortie (3), dans lequel le canal d'écoulement interne (4) est réalisé dans le piston (1) et est conçu pour le guidage de la boisson de l'ouverture d'entrée (3) vers l'ouverture de sortie (4) et dans lequel le piston (1) comprend, sur sa face externe, plusieurs nervures (8, 8', 9),
    caractérisé en ce qu'au moins une des plusieurs nervures (8, 8') est conçue comme une nervure échelonnée (9), dans lequel l'au moins une nervure échelonnée (9) présente plusieurs premières parties (10) et au moins une deuxième partie (11) disposée entre des premières parties (10) adjacentes, dans lequel les plusieurs premières parties (10) sont conçues pour entrer en contact, lors de la disposition du piston (1) dans un compartiment à piston (14), avec une paroi (15) du compartiment à piston (14) et dans lequel l'au moins une deuxième partie (11) est réalisé respectivement comme un renfoncement par rapport aux plusieurs premières parties (10).
  2. Piston selon la revendication 1, caractérisé en ce que les plusieurs nervures (8, 8', 9) s'étendent dans une direction longitudinale du piston (1) et/ou dans une direction transversale du piston (1), dans lequel l'au moins une nervure échelonnée (9) s'étend de préférence dans une direction longitudinale du piston (1).
  3. Piston selon la revendication 1 ou 2, caractérisé en ce que, dans le cas de plusieurs deuxièmes parties (11), les renfoncements d'au moins deux des plusieurs deuxièmes parties (11) sont réalisés de manière identique.
  4. Piston selon l'une des revendications 1 à 3, caractérisé en ce que, dans le cas de plusieurs deuxièmes parties (11), les renfoncements d'au moins deux des plusieurs deuxièmes parties (11) sont réalisés de manières différentes.
  5. Piston selon l'une des revendications 1 à 4, caractérisé en ce que les arêtes orientées vers l'extérieur des plusieurs premières parties (10) se trouvent sur une droite ou un cercle, dans lequel, dans le cas d'une droite, la droite est disposée de préférence parallèlement à un axe central (12) du piston (1) et dans lequel, dans le cas d'un cercle, le cercle présente de préférence un centre sur l'axe central (12) du piston (1).
  6. Piston selon l'une des revendications 1 à 5, caractérisé en ce qu'une arête orientée vers l'extérieur dans les plusieurs premières parties (10) et une arête orientée vers l'extérieur dans l'au moins une deuxième partie (11) sont disposées respectivement de manière parallèle ou coaxiale entre elles.
  7. Piston selon l'une des revendications 1 à 6, caractérisé en ce que l'au moins une deuxième partie (11) présente, au niveau d'une extrémité orientée vers une première partie (10), une partie de transition (13), dans lequel une arête orientée vers l'extérieur de la partie de transition (13) produit une transition, de préférence continue, entre des premières et deuxièmes parties (10, 11) adjacentes, dans lequel l'arête orientée vers l'extérieur de la partie de transition (13) est inclinée de préférence d'un angle entre 30° et 70° par rapport à une ligne de liaison des premières parties (10).
  8. Piston selon l'une des revendications 1 à 7, caractérisé en ce qu'une arête orientée vers l'extérieur entre une première partie (10) et une deuxième partie (11) est arrondie.
  9. Piston selon l'une des revendications 1 à 8, caractérisé en ce qu'une surface d'enveloppe est réalisée de manière cylindrique autour du piston (1).
  10. Piston selon l'une des revendications 1 à 9, caractérisé en ce que les nervures (8, 8', 9) présentent une largeur entre 5 % et 45 % d'une extension du piston (1) dans une direction transversale du piston (1), de préférence une largeur entre 15 % et 35 % d'une extension du piston (1) dans une direction transversale du piston (1).
  11. Piston selon l'une des revendications 1 à 10, caractérisé en ce qu'une première nervure et une deuxième nervure se croisent sur une ligne de coupe (26), dans lequel la première nervure et/ou la deuxième nervure est une nervure échelonnée et dans lequel une des premières parties de la nervure échelonnée est disposée au niveau de la ligne de coupe (26).
  12. Robinet de soutirage pour le soutirage d'une boisson dans un récipient, de préférence de bière dans un fût de bière, plus particulièrement de préférence de bière dans un fût de bière pour événements festifs de 5 I, comprenant un manchon (17) et un piston (1) selon l'une des revendications 1 à 11, dans lequel le piston (1) est disposé au moins partiellement dans un compartiment à piston (14) du manchon (17), dans lequel, dans le manchon (17), est réalisée une ouverture d'écoulement d'entrée (21), par l'intermédiaire de laquelle la boisson peut s'écouler vers le compartiment à piston (14), dans lequel les plusieurs premières parties (10) de l'au moins une nervure échelonnée (9) entrent en contact avec une paroi (15) du compartiment à piston (14), tandis que l'au moins une deuxième partie (11) est distante de la paroi (15) du compartiment à piston (14).
  13. Robinet de soutirage selon la revendication 12, caractérisé en ce que le robinet de soutirage (16) comprend une tête d'écoulement (18) avec une ouverture de soutirage (22), dans lequel la tête d'écoulement (18) peut être pivotée entre une position de blocage et une position de soutirage et dans lequel la tête d'écoulement (18) est adaptée au piston (1) de sorte que, dans la position de soutirage, la boisson peut s'écouler de l'ouverture de sortie (3) vers l'ouverture de soutirage (22).
  14. Robinet de soutirage selon la revendication 12 ou 13, caractérisé en ce que le piston (1) est conçu de façon à coulisser dans le compartiment à piston (14) entre une position de fermeture et une position de travail dans la direction longitudinale du manchon (17), dans lequel le manchon (17) et le piston (1) sont adaptés l'un à l'autre de sorte que, dans la position de travail, la boisson peut s'écouler à travers l'ouverture d'écoulement d'entrée (21) vers l'ouverture d'entrée (2).
  15. Récipient pour une boisson, de préférence fût de bière, plus particulièrement de préférence de bière dans un fût de bière pour événements festifs de 5 I, dans lequel au moins une paroi de récipient (19) définit une capacité (20) à l'intérieur du récipient et dans lequel, à travers une des au moins une paroi de récipient (19), est guidé un robinet de soutirage (16) selon l'une des revendications 12 à 14, qui permet un soutirage d'une boisson hors de la capacité (20).
EP21854742.0A 2021-01-18 2021-12-21 Piston, robinet de soutirage et réservoir de boissons Active EP4093697B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021200423.7A DE102021200423A1 (de) 2021-01-18 2021-01-18 Kolben, Zapfhahn und Behälter für Getränke
PCT/DE2021/200271 WO2022152346A1 (fr) 2021-01-18 2021-12-21 Piston, robinet de soutirage et réservoir de boissons

Publications (3)

Publication Number Publication Date
EP4093697A1 EP4093697A1 (fr) 2022-11-30
EP4093697B1 true EP4093697B1 (fr) 2024-02-07
EP4093697C0 EP4093697C0 (fr) 2024-02-07

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EP21854742.0A Active EP4093697B1 (fr) 2021-01-18 2021-12-21 Piston, robinet de soutirage et réservoir de boissons

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EP (1) EP4093697B1 (fr)
DE (1) DE102021200423A1 (fr)
WO (1) WO2022152346A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19825929A1 (de) * 1997-12-13 1999-06-17 Huber Verpackungen Gmbh & Co Zapfhahn zur Entnahme von Fluid aus einem Behälter
DE29722034U1 (de) * 1997-12-13 1998-02-05 Huber Verpackungen Gmbh & Co Behälter für Flüssigkeiten, insbesondere Getränke
DE10112451A1 (de) 2001-03-14 2002-09-19 Oberhofer Werkzeugbau Gmbh Nachtropffreier Zapfhahn
US6845786B1 (en) * 2004-04-07 2005-01-25 Heiner Ophardt Spigot valve
EP2384307B1 (fr) 2008-12-16 2013-06-19 Erwin Promoli Dispositif de soutirage
EP3418250A1 (fr) 2017-06-22 2018-12-26 OAM GmbH Fermeture pour un récipient de boisson

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WO2022152346A1 (fr) 2022-07-21
EP4093697C0 (fr) 2024-02-07
DE102021200423A1 (de) 2022-07-21
EP4093697A1 (fr) 2022-11-30

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