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:
Jan. 26, 2010
Filed:
Mar. 23, 2006
Xavier Jaffrezic, Velizy, FR;
Andre Agneray, Boulogne, FR;
Xavier Jaffrezic, Velizy, FR;
Andre Agneray, Boulogne, FR;
Renault S.A.S., Boulogne Billancourt, FR;
Abstract
A spark plug for an internal combustion engine of a motor vehicle; the spark plug is embodied with a generally essentially long shape and includes: an essentially capacitive lower part including two coaxial electrodes, one of which is a central electrode, and the other a threaded shell for screwing in the spark plug on the engine; and an essentially inductive upper part including a central winding including a plurality of coils wound around a coaxial mandrel, an envelope, and an insulator inserted between the envelope and the winding. The essentially capacitive part and the essentially inductive part are mechanically interconnected as to enable transmission of a clamping couple applied to the envelope to the essentially capacitive lower part. The mandrel can be elastically deformed as to compensate effects of dilation of the insulator.