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. 28, 1993
Filed:
Aug. 21, 1992
Applicant:
Inventors:
Tadao Ozawa, Nagoya, JP;
Yukio Miyairi, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02F / ;
U.S. Cl.
CPC ...
1231936 ; 29888042 ; 29888047 ; 92212 ;
Abstract
A metal of which the body of a piston is formed contains iron as its main component, and the configuration of a silicon nitride member, the high-temperature strength of the silicon nitride material that composes the silicon nitride member, the melting point of the iron-containing metallic material and the inserting conditions satisfy the following formulae (1) and (2) or formulae (3) and (4):