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:
Mar. 08, 2016
Filed:
May. 28, 2015
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Katsuya Takaoka, Ichinomiya, JP;
Kazuhiro Kurosawa, Komaki, JP;
Kuniharu Tanaka, Komaki, JP;
Haruki Yoshida, Tajimi, JP;
Hirokazu Kurono, Nagoya, JP;
Toshitaka Honda, Nagoya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A spark plug including an insulator having an axial hole, a center electrode held at one end side and a terminal electrode held at the other end side of the axial hole, an electrical connection portion electrically connecting the center electrode and the terminal electrode inside the axial hole, wherein the electrical connection portion includes a conductor including a ceramic phase and a metal wire having a spiral structure portion, wherein the metal wire has a wire diameter of 0.1 mm or greater and 0.5 mm or smaller, and wherein the spiral structure portion of the metal wire is configured such that an outer diameter thereof is 1.0 mm or greater and 3 mm or smaller, a pitch thereof is 0.3 mm or greater and 1 mm or smaller, and a height thereof is 8 mm or greater and 30 mm or smaller.