Refrigeration – Automatic control – By congealed removable product condition
Patent
1974-11-29
1976-02-10
Wayner, William E.
Refrigeration
Automatic control
By congealed removable product condition
62353, F25C 110, F16D 1100
Patent
active
039370321
ABSTRACT:
An ice clutch control for an automatic ice maker wherein a drive motor continually turns a threaded drive rod extending within a liquid filled temperature sensing tube which in turn is positioned within a pocket of an ice cube mold. Upon the freezing of the water in the mold the temperature of the sensing tube and the liquid charge contained therein is frozen solid causing the rod to thread in the solid liquid resulting in axial travel of the rod so as to exert a thrust on coupling means thereby initiating the ice harvesting sequence of the ice maker. Upon completion of the harvesting operation the temperature of the sensing tube is raised by the fill water in the mold which melts the frozen liquid therein freeing the threaded rod from the coupling means for resumption of its independent rotation by the drive motor until the liquid charge is refrozen during the next ice making cycle of the ice maker.
REFERENCES:
patent: 2907179 (1959-10-01), Frei
patent: 3306072 (1967-02-01), Dahlgren et al.
patent: 3702543 (1972-11-01), Lyman
patent: 3712076 (1973-01-01), Fox
patent: 3727427 (1973-04-01), Eyman et al.
patent: 3745779 (1973-07-01), Bright
Barthel Edward P.
General Motors Corporation
Wayner William E.
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