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. 16, 2005
Filed:
Jul. 16, 2002
Andreas Reissner, Stuttgart, DE;
Armin Kussmaul, Bietigheim-Bissingen, DE;
Steffen Carbon, Schorndorf, DE;
Christoph Kern, Aspach, DE;
Andreas Reissner, Stuttgart, DE;
Armin Kussmaul, Bietigheim-Bissingen, DE;
Steffen Carbon, Schorndorf, DE;
Christoph Kern, Aspach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An electrically heatable glow plug and a method for manufacturing an electrically heatable glow plug are proposed that enable a protection of a heating coil of the glow plug against nitridation and evaporation of the aluminum from the heating conductor alloy. The glow plug includes a glow tube that is closed at the end, into which the electrically conductive heating coil is inserted, the heating coil being formed at least partially of aluminum, in particular of an aluminun-iron-chromium alloy. In the glow tube, oxygen donors are provided in order to form an aluminum oxide layer on the surface of the heating coil before or during the heating of the heating coil.