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:
Apr. 16, 1996
Filed:
Jul. 01, 1994
Charles D Grant, Powell, OH (US);
Ranco Incorporated of Delaware, Wilmington, DE (US);
Abstract
A self-calibrating defrost controller for use with heat pump. The outdoor heat exchanger coil of a heat pump is defrosted based upon either compressor run-time exceeding 6 hours, or the temperature difference between the coil and ambient air exceeding a value that changes depending upon outdoor coil temperature. A programmable controller mounted to a printed circuit board within a housing executes a control program to monitor temperature sensor produced temperature signals. One sensor that monitors ambient temperature is mounted to the printed circuit board that also supports the programmable controller.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile