The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Nov. 29, 1976
Robert Smith, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A domestic refrigerator control arrangement for automatically defrosting the cabinet with a minimum of cycle time while obviating the buildup of frost within the cold air conduits. A defrost heater is located at the frontal area of the evaporator coils and the defrost thermostat on the rearward edge of the cross fins coil assembly in the air stream of the air circulating fan sensing the temperature of the air exiting the evaporator. The fan is wired in series with the defrost thermostat and operates upon the energization of the defrost heater, while being deenergized upon the opening of the defrost thermostat contacts at the end of the defrost period. The fan remains in its off position until the defrost thermostat recloses, insuring that moisture-laden air is not distributed throughout the refrigerator.