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:
Aug. 20, 1991
Filed:
Jan. 29, 1990
Hans A Harle, Bopfingen, DE;
Schwabische Huttenwerke GmbH, , DE;
Abstract
In a process for producing a camshaft provided with bearings and cams from a pipe or from a blank having an initial oval cam shape, the configuration of the camshaft with the cams and the bearings is molded into the pipe or hollow blank by swaging and circular kneading with tool segments. In a first step, a cam shape blank (9) is brought in the area of the bearings (13) to an at least approximately circular shape by forging or hammering of the camshaft in a pre-formation. Then in a second step the configuration of the camshaft with cams (16) and bearings (13) is molded by hammering a circular kneading with tools elements that at least partly surround the blank and exert radial compressive forces thereon while changing its initial shape and oval cross section.