Rotary electrothermal actuator

Details Rotary electrothermal actuator Rotary electrothermal actuator

1991-09-30

1993-04-20

Ostrager, Allen M.

Power plants

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

Mass is a liquid

92 31, 92116, F03G 706

Patent

active

052031713

ABSTRACT:
An electrothermal actuator for converting electrical energy to rotational mechanical motion includes a housing, a flexible diaphragm disposed in the housing and defining a boiler chamber within the housing, a working fluid disposed within the boiler chamber and changing phase in response to heating, thereby displacing the diaphragm, a heater disposed within the boiler chamber for heating the working fluid in response to an electrical current flowing through the heater, and a rotatable shaft assembly partially disposed within the housing and including a rotating shaft extending outside the housing, rotating between a return position and a rotated position, and a driver for rotating the shaft from the return position toward a rotated position in response to heating of the working fluid, displacing the diaphragm.

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patent: 4887429 (1989-12-01), Birli, Sr. et al.

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