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:
Sep. 07, 2010
Filed:
Aug. 01, 2006
Michiyuki Kamiji, Osaka, JP;
Michiyuki Kamiji, Osaka, JP;
Nakanishi Metal Works Co., Ltd., Osaka-shi, JP;
OTICS Corporation, Nishio-shi, JP;
Abstract
The present invention provides a rocker arm manufacturing method capable of improving the durability and excellent in productivity. In the method according to the present invention, an intermediate producthaving both side wallsextended in a predetermined direction and arranged in parallel with each other and one end side connection wallconnecting lower ends of a longitudinal one end of both the side walls is obtained. Next, both side wallsformed at the one end of the intermediate productare inwardly bent. Thereafter, ironing diesare pressed down against outer surfaces of both the inclined side wallsfrom an upper side to a lower side to execute ironing of outer surface portions of both the side wallsto downwardly plastically fluidize the constituent material of both the side wallsto thereby form valve stem guide wallsat both sides of the one end side connection wallin a downwardly protruded manner.