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:
Sep. 02, 2008
Filed:
Feb. 18, 2005
Takaya Yoshikawa, Kasugai, JP;
Shinya Murakoshi, Nagoya, JP;
Takaya Yoshikawa, Kasugai, JP;
Shinya Murakoshi, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
An object is to provide a glow plug in which a gap can be prevented from being generated between a ceramic heater and a cylindrical member even at the time of use in an internal combustion engine, etc. so that electrical conduction of the glow plug can be prevented from being lowered. A glow plug includes: a rod-shaped ceramic heater; a rod-shaped center poleextending axially so as to electrically connect to the outside; and a cylindrical memberhaving a front end portionbonded to an outer circumferential surfaceof a rear end side of the ceramic heater, and a rear end portionbonded to an outer circumferential surface of a front end side of the center pole, the cylindrical memberbeing made by a metal material for electrically connecting one of a pair of lead portions and the center poleto each other, the glow plug characterized in that the cylindrical memberhas a Vickers hardness of not lower than 200 HV at 25° C.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile