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:
Aug. 31, 1982
Filed:
Jul. 07, 1980
Horst Goertler, Sachsenheim, DE;
Friedrich Hetzel, Muhlacker, DE;
Uwe Knobloch, Heilbronn-Sontheim, DE;
Hans Muller, Muhlacker-Muhlhausen, DE;
Hans Prohaska, Bietigheim-Bissingen, DE;
Horst Rachner, Bietigheim-Bissingen, DE;
Wolfgang Spieth, Freiberg, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
A safety control circuit for electric motors of power windows of automotive vehicles and which differentiates between a tight fitting of the window pane and an obstacle blockage. The motor current is selectively detected to provide a signal representative of the instantaneous rather than static current values. The detected signal is compared to a reference signal. When the detected signal exceeds the reference signal by a given value or longer than a predetermined interval, which indicates that an obstacle blockage has occurred, the motor current is switched off or reversed.