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. 13, 2002
Filed:
Dec. 07, 2001
Hideki Teramura, Mie, JP;
Hiroyuki Kimata, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A glow plug includes an inner pole and a ceramic heating rod disposed in and fixed to an outer shell at uppermost and lowermost pole fixed portions A, C and a heating rod fixed portion D. A ratio of L /L is larger than 2, where L is a distance from the lower end of the inner pole to the lower end of the fixed portion C; and L is a distance from the lower end of the inner pole to the lower end of the fixed portion A. A ratio of L /L is smaller than 15, wherein L is a distance from a middle point between the lower end of the inner pole and the upper end of the heating rod to the lower end of the fixed portion C; and L is a distance from the above middle point to the upper end of the fixed portion D.