TRIGGERED-STROKE ACTUATOR WITH DAMPED RETURN TRAVEL
First Claim
1. A triggered-stroke actuator comprising a body housing a piston connected to a rod that projects from one end of said body, said rod being adapted to be coupled to a mechanism able to exert thereon a variable return force, and a controlled gas generator mounted in said body facing said piston and at a predetermined distance from an initial position prior to being triggered, an expansion chamber thus being defined between said gas generator and said piston, said gas generator including an initial activation pyrotechnic charge of the actuator that is in communication with said expansion chamber, wherein the actuator further includes at least one additional pyrotechnic charge, situated in a housing in communication with the expansion chamber in order to exert resistance against return on the piston, which resistance is adapted to the way said variable return force acting on said rod varies over time.
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Accused Products
Abstract
A triggered-stroke actuator presenting at least one additional pyrotechnic charge for adapting its resistance against return to vary in desired manner.
According to the invention, at least one additional pyrotechnic charge (21a-21c) is situated in a housing communicating with the expansion chamber (24) of the actuator (11).
7 Citations
19 Claims
- 1. A triggered-stroke actuator comprising a body housing a piston connected to a rod that projects from one end of said body, said rod being adapted to be coupled to a mechanism able to exert thereon a variable return force, and a controlled gas generator mounted in said body facing said piston and at a predetermined distance from an initial position prior to being triggered, an expansion chamber thus being defined between said gas generator and said piston, said gas generator including an initial activation pyrotechnic charge of the actuator that is in communication with said expansion chamber, wherein the actuator further includes at least one additional pyrotechnic charge, situated in a housing in communication with the expansion chamber in order to exert resistance against return on the piston, which resistance is adapted to the way said variable return force acting on said rod varies over time.
Specification