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. 28, 2006
Filed:
Feb. 19, 2004
Applicants:
Wilhelm Arns, Paderborn, DE;
Hans-jürgen Knaup, Bad Lippspringe, DE;
Inventors:
Wilhelm Arns, Paderborn, DE;
Hans-Jürgen Knaup, Bad Lippspringe, DE;
Assignee:
Benteler Automobiltechnik GmbH, Paderborn, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21D 37/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hardened steel part of complex shape is made from a workpiece by first heating the workpiece to an annealing temperature. Then, while the workpiece is still at the annealing temperature, the workpiece is rapidly deformed by a machine into an intermediate shape. The deformed workpiece is then moved from the machine to a press, and, while the workpiece is still at the annealing temperature, it is deformed in the press to the complex shape and then held in the press to harden the workpiece.