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:
Feb. 22, 2011
Filed:
Mar. 24, 2006
Tadao Baba, Tochigi-ken, JP;
Takahiro Yamaguchi, Shimotsuke, JP;
Masanori Kosugi, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A surface modifying jig of an engine valve comprising a substantially circular ring portion for holding the valve head of an engine valve, a head holding portion having a diameter decreasing gradually downward from the inner circumferential side of the ring portion, and a stem holding portion formed below the head holding portion with a substantially constant diameter. When plasma nitriding is performed, the valve head comes into annular line contact with the ring portion and being held by the head holding portion while kept in annular plane contact therewith, and a valve stem is held by the stem holding portion while kept in annular plane contact therewith.