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:
Mar. 25, 2003
Filed:
Aug. 14, 2000
Daniel Drecq, 78610 Saint Leger en Yvelines, FR;
Other;
Abstract
A sparking plug for a combustion engine, includes a metal shell with an externally threaded end part for screwing into a tapped hole in a cylinder head. The shell supports, on the inside, an insulating body, through which there passes a central electrode capable of being connected to a high tension. An annular chamber is delimited by an interior surface in the region of the threaded end part of the shell and the exterior surface of the end of the insulating body. The sparking plug also has at least one pressure sensor, and is designed to subject this sensor to the pressure of an associated combustion chamber when the sparking plug is in place. The pressure sensor is installed in the threaded end part of the shell delimiting the annular chamber radially out from the internal surface of this end part such that the geometry of the annular chamber is not altered by the presence of the sensor.