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. 25, 2003
Filed:
Jan. 16, 2001
Nobutsuna Motohashi, Osaka, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
It is an object of the present invention to provide a rocker arm having such a shape as to avoid generation of defects in a producing process and to avoid increase in weight and design change of a finished shape. A valve fitting portion of a body is formed by wall-thickening one connecting wall and recessing the connecting wall upward. In the wall thickening, a periphery of the connecting wall is pressurized and compressed from end face sides. As a result, defects such as cracking and sinking that occur in forcible guided-bending can be prevented and reduction of rigidity generated in compressing areas of the metal plate to be formed with side walls in wall thickness directions to reduce thickness of the areas as described in the description of the prior art can be avoided. Therefore, it is unnecessary to use a thick metal plate unlike in the prior art and to change design of the finished shape of the rocker arm body.