Electro-thermal bi-stable actuator

Details Electro-thermal bi-stable actuator Electro-thermal bi-stable actuator

1998-07-31

1999-11-02

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

337 12, 337343, 337393, 60527, 60528, H01H 6106, H01H 3746, H01H 3750

Patent

active

059778580

ABSTRACT:
An actuator that uses electrothermal energy to switch between a first latching position and a second latching position. The actuator contains a leaf spring capable of latching into two distinct positions and two shape-memory wires. The shape-memory wires contract when heated and direct the leaf spring toward the two latching states. Once positioned in a latching state, the leaf spring will remain latched in that position until directed toward a different latching state by one of the shape-memory wires.

REFERENCES:
patent: 3613732 (1971-10-01), Willson
patent: 3768057 (1973-10-01), Sekira et al.
patent: 3846679 (1974-11-01), Jost et al.
patent: 4544988 (1985-10-01), Hochstein
patent: 4806815 (1989-02-01), Honma
patent: 5061914 (1991-10-01), Busch et al.
patent: 5463514 (1995-10-01), Yaeger
patent: 5618269 (1997-04-01), Jacobsen et al.

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