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. 06, 1983
Filed:
Oct. 30, 1980
Kyugo Hamai, Yokosuka, JP;
Yasuhiko Nakagawa, Kamakura, JP;
Meroji Nakai, Yokosuka, JP;
Ryuzaburo Maruyama, Fujisawa, JP;
Nissan Motor Company, Limited, Yokahama, JP;
Abstract
A spark plug for an internal combustion engine disclosed herein includes a resistive semiconductor body connecting a center electrode and an earth electrode to perform a creeping discharge at low discharge voltages while keeping adequate ignition performances. According to the invention, the spark plug comprises a back electrode at the back of a discharging gap to cause the creeping discharge on surfaces of an electric insulator which is resistant to electrolytic corrosion, thereby improving the durability of the plug and eliminating the trouble of electric waves of noises.