Control device having a shape memory wire, refrigerator system u

Details Control device having a shape memory wire, refrigerator system u Control device having a shape memory wire, refrigerator system u

1990-10-31

1992-01-28

Tapolcai, William E.

Refrigeration

Automatic control

Of external fluid or means

236 68R, 236101R, 251 11, G05D 2330

Patent

active

050834398

ABSTRACT:
A control device, refrigerator system utilizing the control device and methods of making the same are provided, the control device comprising a housing having a valve seat and having an inlet and an outlet interconnected together by the valve seat, a movable valve member carried by the housing and being adapted to open and close the valve seat by being respectively moved to an open position thereof and a closed position thereof, and a shape memory unit carried by the housing and being operatively interconnected to the valve member to move the valve member to one of the positions thereof by the unit sensing a temperature above a first temperature and to move the valve member to the other of the positions thereof by the unit sensing a temperature below a second temperature, the shape memory unit comprising a shape memory wire having opposed ends interconnected to the housing and having an intermediate portion thereof operatively interconnected to said valve member.

REFERENCES:
patent: 1738072 (1929-12-01), Kalle
patent: 3680306 (1972-08-01), Nikitin et al.
patent: 4284235 (1981-08-01), Diermayer et al.
patent: 4530216 (1985-07-01), Sepso
patent: 4819442 (1989-04-01), Sepso et al.
"Shower Gard" and Flow Gard sold by Memory Metals, Inc.
Known to Adjust Coiled Compression Shape Memory Spring with a Changing Spring Load Thereon.

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