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. 30, 2006
Filed:
Dec. 21, 2001
Hiroshi Miida, Kashiwazaki, JP;
Hiroshi Miida, Kashiwazaki, JP;
Kabushiki Kaisha Riken, Tokyo, JP;
Abstract
A manufacturing method of a piston ring is developed, wherein the method provides a countermeasure for wear of butt ends of the ion plating film coated piston ring and a countermeasure for breakage of the piston ring and the piston ring manufactured at a low cost. A thickness of the film () in the vicinity of butt ends () of a piston ring () is made greater than the thickness of the film () at other outer peripheral surface. Piston ring blanks () are rotated around their own axes toward an evaporation source () and a speed is lowered when the butt ends () face the evaporation source ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile