Refrigeration – Automatic control – Of external fluid or means
Patent
1991-11-20
1992-09-08
Tapolcai, William E.
Refrigeration
Automatic control
Of external fluid or means
F25D 1706
Patent
active
051448130
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: 4284235 (1981-08-01), Diermayer et al.
patent: 4523605 (1985-06-01), Ohkata
patent: 4530216 (1985-07-01), Sepso
Cassarino Aurelio V.
Orner Robert E.
Sepso Roger P.
Robertshaw Controls Company
Tapolcai William E.
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