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. 22, 1998
Filed:
Mar. 23, 1998
Takanori Mizuno, Seto, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A ceramic sintered body fitted into an inner hole through a cylindrical metal outer pipe in the state in which the front end side of the ceramic sintered body is protruded out from the front end of an metal shell, includes: a heating portion to which a positive-pole-side lead is connected in the front end side; and a positive-pole-side electrode lead-out portion having a positive-pole-side electrode portion which is extendedly provided from the positive-pole-side lead in the rear end side. Further, the outer diameter of the positive-pole-side electrode lead-out portion is set to be smaller than that of the negative-pole-side electrode lead-out portion so that the positive-pole-side lead is substantially linear and a sufficient insulation distance between the metal shell functioning as a negative-pole-side terminal and the positive-pole-side lead coil can be secured.