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1. (WO2015172120) CHAMBRE DE PRESSION MULTI-USAGE ET RÉGLABLE POUR ACTIONNEUR PYROTECHNIQUE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

WHAT IS CLAIMED IS:

1. A pressurized gas-powered actuator comprising:

a housing;

a piston movably positioned within the housing, the piston having a drive pocket formed therein; and

a gas generator positioned exterior of the piston and in fluid communication with the drive pocket.

2. The actuator of claim 1 further comprising an expansion cavity extending from an end of the drive pocket.

3. The actuator of claim 2 wherein the expansion cavity has a diameter less than a largest radially outermost dimension of the drive pocket.

4. The actuator of claim 2 wherein the expansion cavity comprises a blind hole.

5. The actuator of claim 2 further comprising a piston rod coupled to the piston so as to move with the piston, and wherein the expansion cavity extends from the end of the drive pocket into the piston rod.

6. The actuator of claim 11 wherein the piston rod has a continuous passage extending therethrough from a first end of the rod to a second end of the rod opposite the first end.

7. The actuator of claim 6 wherein the continuous passage has a first portion with a first diameter and a second portion with a second diameter different from the first diameter.

8. The actuator of claim 11 wherein the expansion cavity includes a first portion having a first diameter and a second portion having a second diameter different from the first diameter.

9. The actuator of claim 11 wherein the continuous passage has a constant diameter along an entire length of the passage.

10. The actuator of claim 2 wherein walls defining the drive pocket form a shape corresponding to a drive pocket/expansion cavity configuration of the actuator.

11. A pressurized gas-powered actuator comprising:

a housing;

a piston rod movably positioned within the housing;

an expansion cavity extending into the piston rod; and

a gas generator positioned exterior of the piston rod and in fluid communication with the expansion cavity.

12. The actuator of claim 11 wherein the expansion cavity is tapered along at least a portion of an axial length of the cavity.

13. The actuator of claim 2 wherein the expansion cavity is tapered along at least a portion of an axial length of the cavity.

14. The actuator of claim 5 wherein the drive pocket but not the expansion cavity is incorporated into a drive pocket attachment formed as a part separate from the piston and attachable to the piston or piston rod.

15. The actuator of claim 2 wherein an outermost dimension of the expansion cavity is greater than an outermost dimension of the drive pocket.

16. The actuator of claim 2 wherein the drive pocket is incorporated into a drive pocket attachment formed as a part separate from the expansion cavity.

17. The actuator of claim 5 wherein the drive pocket is incorporated into a drive pocket attachment formed as a part separate from the piston rod and attachable to the piston rod.

18. The actuator of claim 11 further comprising a drive pocket interposed between the gas generator and the expansion cavity.

19. The actuator of claim 5 wherein the piston rod comprises a metallic outer shell and at least one polymeric portion positioned in an interior of the outer shell.

20. The actuator of claim 11 wherein the piston rod comprises a metallic outer shell and at least one polymeric portion positioned in an interior of the outer shell.

21. The actuator of claim 11 further comprising a plug positionable at a

predetermined location within the piston rod so as to define a limit of the expansion cavity.

22. A product made by a method of forming an actuator, the method comprising the steps of:

providing a hollow tube;

inserting at least one core within the tube so as to define an annular plenum between the tube and the core;

positioning a filler material within the annular plenum, thereby forming a sleeve of filler material defining a chamber therein; and

removing the core from the chamber.

23. The product of claim 22 wherein said method further comprises the step of providing a drive pocket fluidly communicating with said chamber at a first end of the tube.

24. The product of claim 22 wherein said positioning step comprises the steps of: providing a filler material comprising a polymeric melt;

inserting the polymeric melt within the annular plenum; and

cooling the polymeric melt to form a polymeric sleeve to define the chamber within the polymeric sleeve.

25. The product of claim 22 wherein said positioning step comprises the steps of: providing a filler material comprising an uncured polymeric material;

inserting the uncured polymeric material within the annular plenum; and curing the polymeric material to form a polymeric sleeve to define the chamber within the polymeric sleeve.

26. The product of claim 22 wherein said method further comprises the step of: providing an actuator housing;

positioning the piston rod within the housing; and

securing a gas generator within the housing so as to form a gas-tight seal between the gas generator and the housing, and such that the gas generator is in fluid

communication with the chamber.