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. 30, 2005
Filed:
Jul. 11, 2001
Wilfried Förster, Gröditz, DE;
Joachim Schlegel, Freiberg, DE;
Dieter Wamser, Röderau-Bobersen, DE;
Roland Stephan, Riesa, DE;
Wilfried Förster, Gröditz, DE;
Joachim Schlegel, Freiberg, DE;
Dieter Wamser, Röderau-Bobersen, DE;
Roland Stephan, Riesa, DE;
Mannesmannrohren-Werke AG, Mulheim a. d. Ruhr, DE;
Abstract
The invention is directed to a method and a device for producing metal, non-rotationally symmetric rings with a constant wall thickness along their circumference, particularly cam rings, starting from a hot-rolled pipe from which individual portions are severed, mechanically machined and subsequently hardened and tempered. Ring blanks of equal width are severed from the pipe and are mechanically machined on all sides, and the non-rotationally symmetric shape is produced by cold forming, the pipe or the severed ring blank having a structure suitable for cold forming.