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:
Nov. 16, 1982
Filed:
Mar. 17, 1980
Kiyoshi Nakamura, Yokohama, JP;
Masae Nakanishi, Yokohama, JP;
Syozo Kawasaki, Yokohama, JP;
Toshihiko Ochiai, Yokosuka, JP;
Katsutoshi Nishida, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A valve for an internal combustion engine formed of ceramic material for resistance to corrosion, heat and wear. The valve may include a valve tip, a lock groove, a valve stem, a valve fillet, a valve face, a valve margin and a valve head. Certain portions of the valve, such as the valve tip, the lock groove and the valve stem may, alternatively, be formed of metal. The ceramic material includes, among other compositions, silicon nitride, silicon carbide, aluminum nitride, silicon oxynitride, silicon aluminum oxynitride and silicon nitride-silicon carbide.