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. 09, 2005
Filed:
Feb. 15, 2003
Ernst Merk, Weissenhorn, DE;
Ralf Köhler, Langenau, DE;
Ernst Merk, Weissenhorn, DE;
Ralf Köhler, Langenau, DE;
Beurer GmbH & Co., Ulm, DE;
Abstract
A heating system having an electrical heating conductor arrangement which is integrated into a flexible heating body that can be connected to a supply voltage by a connecting cable and has a first conductor and an adjacent second conductor, placed in series with the first and separated from it by an insulating device, having a heating circuit formed by the heating conductor arrangement and further elements, including a control element for a heating current. A control circuit is connected to the control member for affecting the heating current and regulating the temperature. Monitoring is extended because the insulating device has a resistance characteristic which decreases with temperature. The control circuit is coupled via a monitoring branch to a section of the heating circuit which, as a function of the temperature of the insulating device, responds to a resistance temperature change in the insulating device for picking up an electrical monitoring current or voltage, and the control circuit responds when the monitoring signal exceeds a threshold and interrupts the heating current by triggering the control element.