Electro-thermal actuator

Details Electro-thermal actuator Electro-thermal actuator

1989-05-04

1989-12-19

Ostrager, Allen M.

Power plants

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

Mass is a solid

60531, F03G 706

Patent

active

048874299

ABSTRACT:
An electro-thermal actuator has a boiler chamber in which a working fluid is heated to increase its pressure and a variable volume chamber defined in part by a rolling diaphragm. When the working fluid is heated to a sufficient temperature, the pressure within the variable volume chamber becomes large enough to force a spring-loaded piston rod out of the actuator by the rolling motion of the diaphragm. The boiler chamber communicates with the variable volume chamber through a flexible partition containing a normally closed opening consisting a single slit. The flexible partition absorbs external forces applied to the piston rod when it is extended without the rupture of any actuator parts. In addition, the flexible partition produces improved actuator response time.

REFERENCES:
patent: 3991572 (1976-11-01), Huebscher et al.
patent: 4016722 (1977-04-01), Niederer, Sr.
patent: 4029941 (1977-06-01), Huebscher et al.
patent: 4070859 (1978-01-01), Sobecks
patent: 4079589 (1978-03-01), Birli
patent: 4104507 (1978-08-01), Tisone et al.
patent: 4759189 (1988-07-01), Stropkay et al.

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