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. 30, 2002
Filed:
Dec. 21, 1999
Applicant:
Inventor:
Rudolf Pollner, Bamberg, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/320 ;
U.S. Cl.
CPC ...
H01J 1/320 ;
Abstract
A spark plug having a tubular metallic housing in which an insulator is embedded, a rod-shaped internal conductor configuration being arranged in the insulator. The internal conductor configuration includes a terminal stud, a current-limiting resistor embedded in a conductive contact compound, a contact pin and a center electrode. The current-limiting resistor has two regions of unequal diameter. The diameter is smaller in the region nearer the combustion chamber than in the region farther from the combustion chamber.