Power actuator
First Claim
1. A power actuator for rapidly actuating a driven member, said power actuator comprising:
- a cylinder;
a piston received in said cylinder;
a propellant received in said cylinder for selectively applying a pressure to said piston, a piston rod extending from said piston and having a free end connected to a driven member;
a spring member received in said cylinder to urge said piston out of said cylinder; and
a front end of said propellant received in a central hole of said spring member.
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Accused Products
Abstract
Provided is a compact power actuator which is simple in structure, reliable in operation, and easy to install. The power actuator comprises a piston assembly which is received in a fixed cylinder for either directly or indirectly engaging a driven member, and a propellant for rapidly increasing the inner pressure of the cylinder to push the piston assembly outward so that the driven member may be instantaneously driven. A spring is interposed between the piston assembly and the propellant to urge the piston assembly in the projecting direction. The front end of the propellant fits into the central opening so that the available space may be filly utilized. Therefore, the size of the power actuator can be reduced, and the required amount of the pyrotechnic material for the propellant can be reduced due to the reduced initial volume of the chamber for the expansion of the generated gas.
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Citations
20 Claims
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1. A power actuator for rapidly actuating a driven member, said power actuator comprising:
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a cylinder;
a piston received in said cylinder;
a propellant received in said cylinder for selectively applying a pressure to said piston, a piston rod extending from said piston and having a free end connected to a driven member;
a spring member received in said cylinder to urge said piston out of said cylinder; and
a front end of said propellant received in a central hole of said spring member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power actuator for rapidly actuating a driven member, said power actuator comprising:
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a cylinder;
a piston received in said cylinder;
a propellant received in said cylinder for selectively applying a pressure to said piston, a piston rod extending from said piston and having a free end connected to a driven member;
a spring member received in said cylinder to urge said piston out of said cylinder;
a piston rod retaining member provided at an end of said cylinder remote from said propellant for resisting inadvertent movement of said piston rod during handling but permitting movement of said piston rod when said piston is actuated by said propellant; and
a front end of said propellant received in a central hole of said spring member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification