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. 19, 2006
Filed:
Mar. 22, 2006
Yoshihisa Sugiyama, Gifu, JP;
Katsutoshi Nakayama, Aichi, JP;
Takeru Wakamatsu, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
In a spark plug, the nickel content of a center electrodeis greater than that of a ground electrode. This enhances resistance to spark-induced consumption of the center electrode. Also, the ground electrodeto which a noble-metal chipis joined exhibits high resistance to spark-induced consumption. Accordingly, the spark plugcan be attached to either of a negative-polarity cylinder in which the center electrodeassumes a negative polarity, and a positive-polarity cylinder in which the center electrodeassumes a positive polarity. The noble-metal chipis joined only to the ground electrode, and a noble-metal chip is not joined to the center electrode