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:
Apr. 23, 2002
Filed:
May. 18, 2000
Michihiro Yokoyama, Anjo, JP;
Other;
Abstract
A method for manufacturing a camshaft by inserting a hollow shaft made of steel into an axial hole of a cam lobe made of a sintered alloy, by expanding the hollow shaft by inserting a mandrel into the hollow shaft , and by joining and fixing the expanded hollow shaft and the cam lobe while avoiding the constriction that might otherwise be caused by the retraction of the mandrel inserted, of the expanded hollow shaft . The method includes an expanding step using a diverging long face , which is so formed on the leading head of the mandrel as to diverge at an angle of about 8 to 30 degrees with respect to the axis toward the trailing end, and a bulging portion formed to lead from the diverging face ; and an expanding step using the bulging portion of the mandrel and a converging short face which is formed so as to lead from the bulging portion and to converge at an angle of about 8 to 30 degrees with respect to the axis toward the trailing end.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile