Plastic beer keg

Patent metadata

Field	Value
Publication number	US-9670049-B2
Application number	US-201514747618-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jun 23, 2014
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A beer keg assembly includes a liner or bottle having a body portion and a neck portion. A valve assembly is in the neck portion of the liner. The valve assembly includes an inner retainer portion having an inner annular surface formed on a portion of reduced diameter. A cap is secured to the inner retainer portion. At least one spring imparting force between the cap and the inner annular surface. The at least one spring may include an inner spring biasing a piston and a port against one another. The at least one spring may further include an outer spring, wherein the inner spring and the outer spring are both captured between the inner annular surface and the cap. A pressure relief valve may be disposed in a fluid path leading through a wall of the inner retainer portion.

First claim

What is claimed is:

1. A beer keg assembly comprising:
a liner having a body portion and a neck portion, the neck portion including an outer circumferential surface; and
a valve assembly in the neck portion of the liner, the valve assembly including a retainer capturing an inner spring biasing a port and a piston toward one another, wherein the valve assembly is secured to the outer circumferential surface of the neck portion of the liner such that the inner spring does not impart force on a connection between the valve assembly and the neck portion.

2. The beer keg assembly of claim 1 wherein a connection between the valve assembly and the neck portion is a threaded connection.

3. The beer keg assembly of claim 1 wherein the retainer includes an inner retainer portion having an inner annular surface formed on a portion of reduced diameter against which force from the inner spring bears via the port and the piston.

4. The beer keg assembly of claim 3 wherein the retainer includes a cap secured to a lower end of the inner retainer portion and wherein the force from the inner spring bears against the cap, such that the force of the inner spring is captured between the cap and the inner annular surface of the inner retainer portion.

5. The beer keg assembly of claim 1 further including an outer spring biasing a valve body bearing the inner spring, wherein the outer spring is captured within the retainer such that the outer spring does not exert a force on a connection between the valve assembly and the neck portion of the liner.

6. The beer keg assembly of claim 1 wherein the retainer further includes an outer retainer secured to an inner retainer portion and wherein the outer retainer is secured to an outer surface of the neck portion.

7. The beer keg assembly of claim 1 further including a pressure relief valve disposed in a fluid path leading through a wall of the retainer.

8. The beer keg assembly of claim 7 wherein the retainer includes an inner retainer portion having an inner annular surface formed on a portion of reduced diameter against which upward force from the inner spring bears via the port and the piston, wherein the fluid path of the pressure relief valve extends through the inner retainer portion below the inner annular surface.

9. A beer keg assembly comprising:
a liner having a body portion and a neck portion; and
a valve assembly in the neck portion of the liner, the valve assembly including a retainer having an annular wall sealing against the neck portion, a fluid passage extending through the annular wall, a pressure relief valve in the fluid passage.

10. The beer keg assembly of claim 9 wherein the pressure relief valve is secured within the annular wall of the retainer.

11. The beer keg assembly of claim 10 wherein the retainer includes an inner retainer portion including the annular wall, the retainer further including an outer retainer portion secured to the inner retainer portion and secured to the neck portion.

12. The beer keg assembly of claim 11 wherein the fluid passage extends through the inner retainer portion and the outer retainer portion.

13. The beer keg assembly of claim 12 wherein the inner retainer portion has an inner annular surface formed on a portion of reduced diameter against which upward force from an inner spring bears via a port and a piston, wherein the fluid passage of the pressure relief valve extends through the inner retainer portion below the inner annular surface.

14. The beer keg assembly of claim 13 further including an outer container, the liner received in the outer container, a lid secured to the outer container and having an opening, a portion of the valve assembly extending through the opening in the lid, the beer keg assembly further including a locking ring secured to the outer retainer portion such that the lid is between the locking ring and the liner.

15. The beer keg assembly of claim 11 further including an outer container, the liner received in the outer container, a lid secured to the outer container and having an opening, a portion of the valve assembly extending through the opening in the lid further including a locking ring secured to the outer retainer portion such that the lid is between the locking ring and the liner.

16. The beer keg assembly of claim 9 further including an outer container, the liner received in the outer container, a lid secured to the outer container and having an opening, a portion of the valve assembly extending through the opening in the lid.

17. The beer keg assembly of claim 9 wherein the pressure relief valve includes a cap having an aperture therethrough and a spring biasing a piston away from the cap against a sealing surface.

18. The beer keg assembly of claim 17 wherein the cap and piston are made from POM.

19. A beer keg assembly comprising:
a liner having a body portion and a neck portion; and
a valve assembly in the neck portion of the liner, the valve assembly including an inner retainer portion having an inner annular surface formed on a portion of reduced diameter, a cap secured to the inner retainer portion, at least one spring imparting force between the cap and the inner annular surface.

20. The beer keg assembly of claim 19 wherein the at least one spring includes an inner spring biasing a piston and a port against one another.

21. The beer keg assembly of claim 20 wherein the at least one spring further includes an outer spring, wherein the inner spring and the outer spring are both captured between the inner annular surface and the cap.

22. The beer keg assembly of claim 21 wherein the cap is snap-fit to the inner retainer portion.

23. The beer keg assembly of claim 22 further including an outer container, the liner received in the outer container, a lid secured to the outer container and having an opening, a portion of the valve assembly extending through the opening in the lid.

24. The beer keg assembly of claim 23 wherein the outer container is formed of plastic and the liner is formed of PET.

25. The beer keg assembly of claim 19 further including a pressure relief valve disposed in a fluid path leading through a wall of the inner retainer portion.

26. A beer keg assembly comprising:
a liner having a body portion and a neck portion; and
a valve assembly in the neck portion of the liner, the valve assembly including a retainer capturing an inner spring biasing a port and a piston toward one another, wherein the retainer further includes an outer retainer secured to an inner retainer portion and wherein the outer retainer is secured to an outer surface of the neck portion.

27. The beer keg assembly of claim 26 further including an outer container, the liner received in the outer container, a lid secured to the outer container and having an opening, a portion of the valve assembly extending through the opening in the lid.

28. The beer keg assembly of claim 27 wherein the neck portion of the liner is externally threaded.

29. The beer keg assembly of claim 28 wherein the outer container is molded of plastic and the liner is formed of PET.

30. The beer keg assembly of claim 29 wherein the inner retainer portion has an inner annular surface formed on a portion of reduced diameter, a cap secured to the inner retainer portion, an outer spring imparting force between the cap and the i

Assignees

• Rehrig Pacific Co

Inventors

• Apps William P

Classifications

• B67D1/0845

  Security means · CPC title

• B67D1/125

  Safety means, e.g. over-pressure valves · CPC title

• B67D1/0832 Primary

  with two valves disposed concentrically · CPC title

• B67D1/0804

  Shape or materials · CPC title

• B67D1/0462

  Squeezing collapsible or flexible beverage containers, e.g. bag-in-box containers · CPC title