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:
Jul. 18, 1978
Filed:
Dec. 16, 1976
Applicant:
Inventors:
Iwao Yamamoto, Tokyo, JP;
Moriro Koga, Tokyo, JP;
Assignee:
SAID Iwao Yamamoto, by said Moriro Koga, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T / ;
U.S. Cl.
CPC ...
313141 ; 1231 / ;
Abstract
Disclosed is an improved spark plug in which a projection is provided at the end face of a central electrode and an earthing electrode is fixed by projection weld to the end surface of a main body to form a small gap between an outer angular portion of said projection and an underside angular portion of the nose of said earthing electrode, and which makes it possible to use a dilute air/fuel mixture and, hence, to decrease an amount of harmful exhaust gases.