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:
May. 03, 1988
Filed:
May. 27, 1986
Applicant:
Inventors:
Assignee:
NGK Insulators, Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
92212 ; 92213 ; 92221 ; 92224 ;
Abstract
A piston for internal combustion engines is disclosed, which includes a piston main body of metallic material, and a ceramic piston head member embedded in the top portion of the piston main body. The piston head member is formed on its peripheral surface with one or more extensions of dovetail section protruding radially outwards and having an axially measured thickness which increases toward the outer end thereof. The piston head member is retained in place with a substantially constant retaining force, even during the operation of the engine.