Shape memory alloy actuator

Details Shape memory alloy actuator Shape memory alloy actuator

1986-10-16

1987-10-20

Husar, Stephen F.

Power plants

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

Mass is a solid

60527, 337140, 415 33, F03G 706

Patent

active

047005416

ABSTRACT:
An electrically controlled shape memory alloy actuator capable of being miniaturized for use in robotics and other fields. The actuator is made of a shape memory alloy wire which is torsioned end along its longitudinal axis and with its ends constrained against movement. A lever or other suitable element is attached to the wire at a desired point other than at a wire end. A plurality of electrical connections spaced along the wire define a plurality of different sections of the wire. The wire and attached control element is made to rotate by selectively applying voltages to the different sections of the wire to heat the individual sections.

REFERENCES:
patent: 4010455 (1977-03-01), Stange
patent: 4553393 (1985-11-01), Ruoff
"Application of Shape Memory Alloy to Robotic Actuators", J. Robotic Systems, Hashimoto et al., 1985, pp. 3-25.
"Tactile Detection Performed by SME Actuator", Bull. Japan Soc. of Prec. Engg., vol. 18, No. 3, Honma et al., 1984, pp. 274-276.

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