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:
Nov. 10, 2015
Filed:
Aug. 19, 2013
Denso Corporation, Kariya-city, Aichi-ken, JP;
Ishifuku Metal Industry Co., Ltd., Soka-shi, Saitama, JP;
Yuki Murayama, Toyoake, JP;
Nobuo Abe, Yokkaichi, JP;
Yoshinori Doi, Soka, JP;
Toshiyuki Tomine, Soka, JP;
Shunsuke Yokota, Soka, JP;
DENSO CORPORATION, Kariya, JP;
ISHIFUKU METAL INDUSTRY CO., LTD., Soka, JP;
Abstract
A spark plug has a center electrode and an earth electrode. The center electrode is faced to the earth electrode so that a spark discharging gap is formed between the center electrode and the earth electrode. An electrode chip is formed on at least one of the center electrode and the earth electrode. The electrode chip has a composition containing 40 to 60 mol % of aluminum and iridium as a remainder thereof. In the composition of the electrode chip, it is possible to replace part of the iridium with 1 to 20 mol % of at least one metal selected from nickel, iron, cobalt, platinum and rhodium.