High pressure bellows assembly

1. A high pressure bellows assembly comprising:

a first bellows being reversibly expandable;

a second bellows being reversibly expandable;

a chamber including a first portion encircling said first bellows, a second portion including an interior of said second bellows, and a third portion placing the first and second portion in fluid communication;

a first valve member disposed with said chamber between said first and third portions; and

a second valve member disposed with said chamber between said first and second portions.

2. The high pressure bellows assembly of claim 1 wherein:

said first valve member encloses a first end of said first bellows; and

said second valve member encloses a first end of said second bellows.

3. The high pressure bellows assembly of claim 1 further comprising:

a secondary pressure absorption arrangement including an annular groove in said first valve member and a washer disposed in said annular groove.

4. The high pressure bellows assembly of claim 1 wherein:

said first valve member is disposed at a first moveable end of said first bellows; and

said second valve member is disposed at a first moveable end of said second bellows.

5. The high pressure bellows assembly of claim 4 wherein said first valve member and said first end of said first bellows are operable to move away from a second end of said first bellows as said first bellows expands and said second valve member and said first end of said second bellows are operable to move away from a second end of said second bellows as said second bellows expands.

6. The high pressure bellows assembly of claim 4 wherein said first valve member and said first end of said first bellows move toward said first valve seat during movement away from a second end of said first bellows as said first bellows expands and said second valve member and said first end of said second bellows move away from said second end of said second bellows and said second valve seat as said second bellows expands.

7. The high pressure bellows assembly of claim 4 further comprising first and second valve seats disposed in said chamber respectively positioned at opposite ends of said third portion of said chamber.

8. The high pressure bellows assembly of claim 7 wherein said first valve member moves away from said first valve seat as said first bellows contracts and said second valve member moves toward said second valve seat as said second bellows contracts.

9. The high pressure bellows assembly of claim 8 wherein said first valve member contacts said first valve seat and closes said first and third portions of said chamber with respect to one another when said first bellows is less than fully expanded.

10. The high pressure bellows assembly of claim 8 wherein said second valve member contacts said second valve seat and closes said first and third portions of said chamber with respect to one another when said second bellows is less than fully contracted.

11. The high pressure bellows assembly of claim 1 further comprising:

a manifold defining the third portion of the chamber.

12. The high pressure bellows assembly of claim 11 wherein said manifold only contacts one of said first and second bellows.

13. A method for assembling a high pressure bellows assembly comprising the steps of:

providing a first bellows being reversibly expandable, wherein pressurized fluid is capable of being selectively directed into and out of the first bellows;

providing a second bellows being reversibly expandable, wherein pressurized fluid is capable of being selectively directed into and out of the second bellows; and

interconnecting the first bellows and the second bellows by defining a chamber including a first portion encircling the first bellows, a second portion including an interior of the second bellows, and a third portion placing the first and second portion in fluid communication with one another

fixing respective first ends of each of the first and second bellows;

disposing a first valve seat between the first and third portions and a second valve seat between the second and third portions; and

mounting respective first and second valve closing members operable to sealingly engage the respective first and second valve seats on the respective second ends of each of the first and second bellows.

14. The method of claim 13 further comprising the step:

sizing at least one of the first bellows, the first valve closing member, and the first valve seat whereby the first bellows is neither fully expanded or fully contracted when the first valve closing member is sealingly engaged with first valve seat.

15. The method of claim 13 further comprising the step:

sizing at least one of the second bellows, the second valve closing member, and the second valve seat whereby the second bellows is neither fully expanded or fully contracted when the second valve closing member is sealingly engaged with second valve seat.

16. A high pressure bellows assembly comprising:

a first housing extending between first and second ends;

a first bellows being reversibly expandable and extending between first and second ends and disposed in said first housing;

a first end cap mounted at said first end of said first housing and fixedly engaged with said first end of said first bellows, said first end cap including aperture for directing pressurized fluid into said first bellows;

a second housing extending between first and second ends;

a second bellows being reversibly expandable and extending between first and second ends and disposed in said first housing;

a manifold disposed between and interconnecting said second end of said first housing and said first end of said second housing said manifold fixedly engaged with said first end of said second bellows and including aperture for directing pressurized fluid into said second bellows; and

a chamber including a first portion defined between said first housing and said first bellows and said manifold, a second portion including an interior of said second bellows, and a third portion defined by said manifold and placing the first and second portion in fluid communication.

17. The high pressure bellows assembly of claim 16 further comprising:

a first valve closing member mounted on said second end of said first bellows and enclosing an interior of said first bellows; and

a first valve seat mounted at a first end of said third portion and disposed within said first portion, wherein said first valve closing member sealingly engages said first valve seat, whereby said first portion is closed off from said second and third portions, when said first bellows expands to a less than fully-expanded condition.

18. The high pressure bellows assembly of claim 17

a second valve closing member mounted on said second end of said second bellows and enclosing an interior of said second bellows; and

a second valve seat mounted at a second end of said third portion and disposed within said second portion, wherein said second valve closing member sealingly engages said second valve seat, whereby said second portion is closed off from said first and third portions, when said second bellows contracts to a less than fully-contracted condition.