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:
May. 01, 2012
Filed:
Oct. 25, 2005
Christoph Prasser, Essen, DE;
Rolf Kümmerling, Duisburg, DE;
Stefan Wiedenmaier, Aachen, DE;
Pierre Lefebvre, Bavay, FR;
Rupert Wieser, Seitenstetten, AT;
Robert Koppensteiner, Steyr, AT;
Christoph Prasser, Essen, DE;
Rolf Kümmerling, Duisburg, DE;
Stefan Wiedenmaier, Aachen, DE;
Pierre Lefebvre, Bavay, FR;
Rupert Wieser, Seitenstetten, AT;
Robert Koppensteiner, Steyr, AT;
V & M Deutschland GmbH, Dusseldorf, DE;
Abstract
In a method of making a seamless hot-finished steel pipe a billet heated to a shaping temperature is pierced by a first shaping to a thick-walled hollow ingot which subsequently undergoes a radial forging process using an internal tool inserted in the hollow ingot and at least two forging jaws of a forging machine. The forging jaws act on the outer surface area of the hollow ingot, wherein the hollow ingot is turned and axially advanced in a clocked manner in the idle stroke phase of the forging jaws.