Temperature compensation member composed of shape memory effect

Details Temperature compensation member composed of shape memory effect Temperature compensation member composed of shape memory effect

1990-02-13

1991-10-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, H01L 4100

Patent

active

050598503

ABSTRACT:
An actuator driven by a piezo-electric element in this invention is provided with a piezo-electric element whose negative linear expansion caused by the change of circumjacent temperature is compensated for by positive linear expansion of a temperature compensation member. Since shape memory effect alloy is used for the temperature compensation member, the length of the temperature compensation member can be greatly shortened, and the actuator can be small-sized, light weight and improved in its heat conduction. Also, shape memory effect alloy can be used for temperature compensation members in broader range of temperature by stacking several pieces of the shape memory effect alloy whose transformation temperatures differ from each other.

REFERENCES:
patent: 3673442 (1972-06-01), Sonderegger
patent: 4345176 (1982-08-01), Grudkowski et al.
patent: 4356478 (1982-10-01), Muggli et al.
patent: 4551647 (1985-11-01), Day
patent: 4570098 (1986-02-01), Tomita et al.
patent: 4716731 (1988-01-01), Sakai et al.

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