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. 21, 2006
Filed:
Oct. 03, 2002
Noriyuki Takeo, Kanagawa, JP;
Kazushige Gotou, Kanagawa, JP;
Satoshi Kadokawa, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
The rocker armhas a fitting surfaceon the opposite sides of which guide surfacesare formed, such that the guide surfacesare inclined to be closer to each other toward their tip ends. Even when the valve stemis displaced in the widthwise direction of the fitting surface, the outer peripheral surface of the base end portion of the valve stemcomes into contact with only the tip end of one of the guide surfaces. Consequently, lubrication is improved and friction moment is decreased in the contact area, so that friction resistance is suppressed between the guide surfacesand the outer peripheral surface of the base end of the valve stemto easily obtain high performance of the engine.