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:
Jun. 13, 1989
Filed:
Jun. 12, 1987
Yasushi Sato, Nagoya, JP;
Shigeru Nagasaki, Nagoya, JP;
Masato Taniguchi, Nagoya, JP;
Junichi Kagawa, Nagoya, JP;
Mitsuyoshi Kawamura, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A ceramic valve supporting structure for use in an internal combustion engine comprising: a ceramic valve having an integral stem, an upper portion of which is provided with a circular groove therearound; a frusto-conical shaped cotter comprising a pair of semi-cylindrical pieces, each inner surface of which has a lock projection located within said groove when secured to an outer surface of said stem; an annular retainer secured to an outer surface of said cotter to support said valve through said cotter, said retainer having an inner surface tapered to engage the outer surface of said cotter by wedging action due to a spring force acting upon to said retainer to bring said cotter into tight engagement with said stem; and an elastic layer provided between an inner surface of said cotter and the outer surface of said stem to absorb stress when said cotter engages said stem.