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:
Aug. 06, 1985
Filed:
Nov. 17, 1983
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
1231 / ; 123668 ;
Abstract
An improved two-cycle engine in which the inner wall of the head of the combustion cylinder facing the combustion chamber is formed of a heat-insulating ceramic element which surrounds the tip of a mounting portion of the spark plug of the cylinder. The tip of the spark plug should be threadless in the area surrounded by the ceramic element. The ceramic element is preferably a sintered product made of silicon nitride, zirconia, sialon, alumina or silicon carbide.