Tri-strip memory metal actuator

Details Tri-strip memory metal actuator Tri-strip memory metal actuator

1995-09-22

1996-12-31

Kwon, John T.

Power plants

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

Mass is a solid

60527, F01B 2910

Patent

active

055882951

ABSTRACT:
A tri-strip memory metal actuator is disclosed using first and second oppositely arcuate strips of electrically conductive or semiconductive memory metal, each bound respectively to opposite sides of a straight central strip of electrically conductive material to form, when current is applied therethrough, a Peltier junction causing one of the arcuate strips to heat and return to its memory metal state while the other of the arcuate strips cools and bends along with the central strip to the arcuate shape of the heated strip which bending is reversible when current is applied in the opposite direction and which actuator, if no current is applied, is maintained in the straight position of the central strip.

REFERENCES:
patent: 2487947 (1949-11-01), Senn
patent: 4551975 (1985-11-01), Yamamoto et al.
patent: 4553393 (1985-11-01), Ruoff
patent: 4556050 (1985-12-01), Hodgson et al.
patent: 4636149 (1987-01-01), Brown
patent: 5335498 (1994-08-01), Komatsu et al.

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