Double action spring actuator

Details Double action spring actuator Double action spring actuator

1988-01-11

1989-03-14

Ostrager, Allen M.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

F03G 706

Patent

active

048115649

ABSTRACT:
Electrically operated linear actuators are provided wherein both the forward and rearward motions are obtained by heating a shape memory metal to its austenitic state and thereafter cooling it to its martensitic state. One shape memory metal forms a retractor spring while the other shape memory metal forms an expansion spring.

REFERENCES:
patent: 954682 (1910-04-01), Low et al.
patent: 2967249 (1961-01-01), Quirk
patent: 3016691 (1962-01-01), Asakawa et al.
patent: 3163732 (1964-12-01), Abbott et al.
patent: 4463560 (1984-08-01), Greenleaf et al.

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