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:
Nov. 28, 1989
Filed:
Oct. 28, 1987
Masanobu Nakamura, Kamakura, JP;
Kokan Kako Co., Ltd., Yokohama, JP;
Abstract
A method of securing a tubular member within an annular cam member for the manufacture of a cam shaft is provided, including the steps of forming a cam member from sintered materials with at least two axially extending grooves being provided in the inner surface of the cam member adjacent the portion of the cam member having the greatest thickness such that a radially projecting ridge is defined between adjacent grooves, fitting the tubular member into the cam member, supplying a working fluid to the interior of the tubular member and applying pressure to the fluid so as to expand the tubular member while maintaining substantially the same wall thickness within the cam member until the ridge bites into the outer surface of the expanding tubular member and becomes tightly engaged therewith. The pressure applied to expand the tubular member is less than that required to fully expand the tubular member along the inner surface of the cam member.