Electrothermal actuator with latch mechanism

Details Electrothermal actuator with latch mechanism Electrothermal actuator with latch mechanism

1993-12-27

1995-03-14

Lazarus, Ira S.

Power plants

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

Mass is a liquid

60516, 60528, 251 68, F03G 706

Patent

active

053967704

ABSTRACT:
An electrothermal actuator includes a housing containing a working fluid and a heater disposed in the fluid within the housing. A piston is slidably disposed in the housing for movement in response to heating and cooling of the working fluid. An output member is coupled to the piston and movable between first and second positions for transmitting a drive force from the piston to a load. A latch mechanism is operatively connected to the output member for releasably latching the output member in the second position without continuously heating the working fluid. The latch mechanism includes a coil and a magnetic member that releases the latch in response to a force produced by a magnetic field generated when a current flows through the coil. The output member can move linearly or rotationally.

REFERENCES:
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.
patent: 4887429 (1989-12-01), Birli, Sr. et al.
patent: 5023171 (1993-04-01), Petot et al.

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