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. 21, 1992
Filed:
Jul. 09, 1990
Applicant:
Inventor:
Joseph A Simon, Roseville, MI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72260 ;
Abstract
A lightweight driveshaft is extruded from a tubular metal blank into an elongated tube having an integral center and opposite end sections. The center section has a thin wall while the end sections have a thick wall. The shaft is formed by inserting a tubular blank within a tubular die having a restricted die throat through which the blank is extruded. Punches are inserted into the tubular blank to extrude the shaft.