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:
Nov. 15, 1994
Filed:
Dec. 27, 1993
Donald E Janke, Benton Township, Berrien County, MI (US);
Joseph M Szynal, Laporte, IN (US);
Ronald W Guess, Scott Township, Vanderburgh County, IN (US);
Greg A Bradley, Evansville, IN (US);
Whirlpool Corporation, Benton Harbor, MI (US);
Abstract
A defrost cycle controller for a refrigerator or freezer having a compressor and a defrost heater, comprising a relay operatively connected to the compressor and the defrost heater via contacts to couple one or the other to a power supply, the relay having a normally closed contact to which said compressor is connected and a normally open contact to which said defrost heater is connected; and a control circuit operatively connected to the compressor, defrost heater and relay and configured to implement the following algorithm: (a) first, energize the relay; (b) second, monitor the relay contacts; (c) third, if the contacts do not change states, de-energize the relay; and (d) fourth, rest for a predetermined period, and then commence the algorithm.