Shape-memory electromechanical drive

Details Shape-memory electromechanical drive Shape-memory electromechanical drive

1985-11-07

1988-04-12

Nilson, Robert G.

Power plants

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

Mass is a solid

13762546, 13762548, 251 11, F16K 3102

Patent

active

047365870

ABSTRACT:
A shape-memory electromechanical drive device comprising a casing, a pair of fixed terminal members carried by the casing in electrically insulated relation thereto, an actuating member supported within the casing for movement between two positions from an intermediate position in opposite directions and having a pair of spaced spring seats defined therein, and a pair of coil springs interposed between the fixed terminal members and the spring seats, respectively. Each of the coil springs is made of shape-memory alloy and capable of returning from a compressed state to an original, expanded state when heated to a predetermined temperature. These coil springs are heated by the flow of an electric current therethrough one at a time when the device is in use.

REFERENCES:
patent: 142292 (1873-08-01), Stevens
patent: 954682 (1910-04-01), Wohl et al.
patent: 2996049 (1961-08-01), Huska
patent: 3613732 (1971-10-01), Willson et al.

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