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:
Jun. 09, 1992
Filed:
Dec. 14, 1990
Applicant:
Inventors:
Bernhard Ritter, Pforzheim, DE;
Dieter Fahrlaender, Eberdingen, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60H / ; F24H / ; H05B / ; B60R / ;
U.S. Cl.
CPC ...
219202 ; 392379 ;
Abstract
An electric heating element for the elimination of condensation, frost or the like on windows of motor vehicles, preferably a rear window of a convertible top, is interconnected with an electric blower motor which includes a relay circuit. For safely operating the heating element, the heating element will only be operative when the blower motor is running. A first relay is used for the control of the blower motor and a second relay for the control of the heating element. The second relay, via a line of a control circuit, is connected to a connecting terminal of the blower motor.