Methods and apparatus related to a purge valve for a capacitor

1. An apparatus, comprising:

a housing defining a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity, a first end portion of the lumen having a width and a second end portion of the lumen having a width less than the width of the first end portion, the second end portion of the lumen being adjacent the volume of the cavity, the first end portion being adjacent the volume outside the cavity; and

a purge valve removably coupled to the housing and disposed at least partially within the lumen, the purge valve including an occlusion member, a portion of the occlusion member having a width substantially equal to the width of the second end portion of the lumen such that the portion of the occlusion member is disposed within the second end portion of the lumen when the purge valve is in a first configuration, the portion of the occlusion member being disposed outside the second end portion of the lumen when the purge valve is in a second configuration,

wherein the purge valve includes an adjustable member configured to retain the occlusion member within the lumen of the housing, the adjustable member having a plurality of threads configured to mate with a plurality of threads of the housing to couple the adjustable member to the housing, the adjustable member configured to be unscrewed from the housing to release a pressure within the cavity of the housing.

2. The apparatus of claim 1 , wherein the adjustable member defines a lumen substantially aligned with an axis defined by the second end portion of the lumen of the housing, the volume of the cavity being in pneumatic communication with the volume outside the cavity via the lumen of the adjustable member when the purge valve is in the second configuration.

3. The apparatus of claim 1 , wherein an end portion of the adjustable member is disposed within the lumen of the housing a distance from the first end portion of the lumen, the purge valve moving from its first configuration to its second configuration when a pressure within the cavity is greater than a predetermined pressure, the predetermined pressure varying as the distance varies.

4. The apparatus of claim 1 , wherein the occlusion member pneumatically seals the volume within the cavity from the volume outside the cavity when the purge valve is in the first configuration, the volume within the cavity being in pneumatic communication with the volume outside the cavity when the purge valve is in the second configuration.

5. The apparatus of claim 1 , wherein the occlusion member is substantially spherical.

6. The apparatus of claim 1 , wherein at least one electrochemical double layer capacitor is disposed within the cavity of the housing.

7. The apparatus of claim 1 , wherein the purge valve includes a biased member having a first position and a second position, the biased member disposed adjacent the occlusion member, the biased member being biased in its first position,

the biased member being in its first position and retaining the occlusion member within the second end portion of the lumen of the housing when the purge valve is in the first configuration,

the purge valve moving from its first configuration to its second configuration when a pressure within the cavity causes the occlusion member to move the biased member from its first position to its second position allowing pneumatic communication between the volume of the cavity and the volume outside the cavity, the biased member returning to its first position when the pressure within the cavity returns below a predetermined threshold.

8. The apparatus of claim 1 , wherein the adjustable member defines a lumen and includes a biased member defining a lumen, the lumen of the housing defining a longitudinal axis along which the lumen defined by the adjustable member, the lumen of the biased member and the occlusion member are substantially aligned.

9. The apparatus of claim 1 , wherein the purge valve includes a biased member configured to bias the purge valve in its first configuration.

10. An apparatus, comprising:

a housing defining a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity, a first end portion of the lumen having a width and a second end portion of the lumen having a width less than the width of the first end portion, the second end portion of the lumen being adjacent the volume of the cavity, the first end portion being adjacent the volume outside the cavity; and

a purge valve removably coupled to the housing and disposed at least partially within the lumen, the purge valve including an occlusion member, a portion of the occlusion member having a width substantially equal to the width of the second end portion of the lumen such that the portion of the occlusion member is disposed within the second end portion of the lumen when the purge valve is in a first configuration, the portion of the occlusion member being disposed outside the second end portion of the lumen when the purge valve is in a second configuration,

wherein the purge valve includes a biased member having a first position and a second position, the biased member disposed adjacent the occlusion member, the biased member being biased in its first position,

the biased member being in its first position and retaining the occlusion member within the second end portion of the lumen of the housing when the purge valve is in the first configuration,

the purge valve moving from its first configuration to its second configuration when a pressure within the cavity causes the occlusion member to move the biased member from its first position to its second position allowing pneumatic communication between the volume of the cavity and the volume outside the cavity, the biased member returning to its first position when the pressure within the cavity returns below a predetermined threshold.

11. The apparatus of claim 10 , wherein the purge valve includes an adjustable member configured to retain the occlusion member within the lumen of the housing, the adjustable member defining a lumen substantially aligned with an axis defined by the second end portion of the lumen of the housing, the volume of the cavity being in pneumatic communication with the volume outside the cavity via the lumen of the adjustable member when the purge valve is in the second configuration.

12. The apparatus of claim 10 , wherein the purge valve includes an adjustable member configured to retain the occlusion member within the lumen of the housing, the adjustable member being removable from the housing such that manual manipulation of the adjustable member is operative to release a pressure within the cavity of the housing.

13. The apparatus of claim 10 , wherein the purge valve includes an adjustable member defining a lumen and the biased member also defines a lumen, the lumen of the housing defining a longitudinal axis along which the lumen of the adjustable member, the lumen of the biased member, and the occlusion member are substantially aligned.

14. The apparatus of claim 10 , wherein the occlusion member pneumatically seals the volume within the cavity from the volume outside the cavity when the purge valve is in the first configuration, the volume within the cavity being in pneumatic communication with the volume outside the cavity when the purge valve is in the second configuration.

15. An apparatus, comprising:

a housing defining a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity, a first end portion of the lumen having a width and a second end portion of the lumen having a width less than the width of the first end portion, the second end portion of the lumen being adjacent the volume of the cavity, the first end portion being adjacent the volume outside the cavity; and

a purge valve removably coupled to the housing and disposed at least partially within the lumen, the purge valve including an occlusion member, a portion of the occlusion member having a width substantially equal to the width of the second end portion of the lumen such that the portion of the occlusion member is disposed within the second end portion of the lumen when the purge valve is in a first configuration, the portion of the occlusion member being disposed outside the second end portion of the lumen when the purge valve is in a second configuration,

wherein the purge valve includes an adjustable member defining a lumen and a biased member defining a lumen, the lumen of the housing defining a longitudinal axis along which the lumen of the adjustable member, the lumen of the biased member and the occlusion member are substantially aligned.

16. The apparatus of claim 15 , wherein the adjustable member is configured to retain the occlusion member within the lumen of the housing, the adjustable member being removable from the housing such that manual manipulation of the adjustable member is operative to release a pressure within the cavity of the housing.

17. The apparatus of claim 15 , wherein the volume of the cavity is in pneumatic communication with the volume outside the cavity via the lumen of the adjustable member and the lumen of the biased member when the purge valve is in the second configuration.

18. An apparatus, comprising:

a housing defining a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity, a first end portion of the lumen having a width and a second end portion of the lumen having a width less than the width of the first end portion, the second end portion of the lumen being adjacent the volume of the cavity, the first end portion being adjacent the volume outside the cavity; and

a purge valve removably coupled to the housing and disposed at least partially within the lumen, the purge valve including an occlusion member, a portion of the occlusion member having a width substantially equal to the width of the second end portion of the lumen such that the portion of the occlusion member is disposed within the second end portion of the lumen when the purge valve is in a first configuration, the portion of the occlusion member being disposed outside the second end portion of the lumen when the purge valve is in a second configuration,

wherein the purge valve includes a biased member configured to bias the purge valve in its first configuration.

19. The apparatus of claim 18 , wherein the purge valve includes an adjustable member defining a lumen and the biased member also defines a lumen, the lumen of the housing defining a longitudinal axis along which the lumen of the adjustable member, the lumen of the biased member and the occlusion member are substantially aligned.

20. The apparatus of claim 18 , wherein the volume of the cavity is in pneumatic communication with the volume outside the cavity via the lumen of an adjustable member and the lumen of the biased member when the purge valve is in the second configuration.

21. An apparatus, comprising:

an occlusion member disposed within a lumen of a housing, the occlusion member configured to pneumatically isolate a volume defined by the housing from a volume outside the housing when in a first position;

at least one biased member defining a lumen disposed adjacent the occlusion member and configured to bias the occlusion member in its first position; and

an adjustable member defining a lumen configured to retain the occlusion member and the at least one biased member within the lumen of the housing,

the volume defined by the housing being in pneumatic communication with the volume outside the housing via the lumen of the at least one biased member and the lumen of the adjustable member when the occlusion member is in a second position.

22. The apparatus of claim 21 , wherein the at least one biased member includes an inner surface defining the lumen of the at least one biased member, a first portion of the inner surface contacting the occlusion member, a second portion of the inner surface being disposed apart from the occlusion member.

23. The apparatus of claim 21 , wherein the occlusion member is configured to move from its first position to its second configuration when a pressure within the volume defined by the housing rises above a predetermined pressure, the at least one biased member configured to move the occlusion member from its second position to its first position when the pressure within the volume falls below the predetermined pressure.

24. The apparatus of claim 21 , wherein at least one electrochemical double layer capacitor is disposed within the volume defined by the housing.

25. The apparatus of claim 21 , further comprising:

a washer disposed between the at least one biased member and the adjustable member, the washer defining a lumen substantially aligned along the longitudinal axis.

26. The apparatus of claim 21 , wherein the adjustable member is removable from the housing such that manual manipulation of the adjustable member is operative to release a pressure within the volume defined by the housing.

27. The apparatus of claim 21 , wherein the adjustable member includes a threaded portion configured to releasably couple the adjustable member to the housing.

28. The apparatus of claim 21 , wherein the at least one biased member includes a first biased member when the apparatus is in a first configuration, the at least one biased member including the first biased member and a second biased member when the apparatus is in a second configuration,

the occlusion member being configured to move from its first position to its second position when a pressure within the volume defined by the housing rises above a first predetermined pressure when the apparatus is in the first configuration,

the occlusion member being configured to move from its first position to its second position when the pressure within the volume defined by the housing rises above a second predetermined pressure when the apparatus is in the second configuration, the second predetermined pressure being greater than the first predetermined pressure.

29. The apparatus of claim 21 , wherein the occlusion member, the lumen defined by the at least one biased member, and the lumen defined by the adjustable member are substantially coaxial.