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. 15, 1978
Filed:
Aug. 18, 1977
Applicant:
Inventors:
Glenn F Hyde, Timonium, MD (US);
Thomas W Alban, Glen Burnie, MD (US);
Assignee:
Koppers Company, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
2772 / ; 277224 ; 427 34 ; 427423 ;
Abstract
Disclosed herein is a piston ring for an internal combustion ring having its face plasma sprayed with a ceramic coating comprised of 40% by weight titanium dioxide and 60% by weight aluminum oxide. The ceramic coating material has a low coefficient of friction, high material integrity and superior wetting characteristics.