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:
Dec. 07, 1999
Filed:
Nov. 18, 1997
Takanori Mizuno, Nagoya, JP;
Katsuhiko Tanaka, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A ceramic glow plug (A) is constituted by a metallic sheath (1); a cylindrical main metallic shell (2) having a holding part (21) which holds a rear part (11); an ceramic heating element (3) fitted into the metallic sheath (1) and obtained by connecting one-side ends (331, 341) of lead-out wires (33, 34) respectively to the ends (321, 322) of a heating resistor (32) to obtain a heater main body, embedding the heater main body in a ceramic powder, and hot-pressing and sintering the powder; a terminal electrode (4) inserted into the cylindrical main metallic shell (2) on its rear end side and insulated therefrom; and lead coils (51, 52) connected to the lead-out wires (33, 34) in such a manner that one-side ends of the coils (51, 52) are brazed respectively to those areas of the lead-out wires (33, 34) which are exposed on the bake surface with a high-purity silver-based brazing material and the other ends thereof are electrically connected respectively to the cylindrical main metallic shell (2) and the terminal electrode (4).