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. 02, 2021
Filed:
Jun. 30, 2017
Applicant:
Sms Group Gmbh, Duesseldorf, DE;
Inventors:
Uwe Muschalik, Duisburg, DE;
Jens Magenheimer, Aachen, DE;
Anna Rott, Aachen, DE;
Koos van Putten, Heerlen, NL;
Assignee:
SMS group GmbH, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C 25/04 (2006.01); B21C 23/08 (2006.01); B21C 23/21 (2006.01); B21C 25/08 (2006.01); B21C 23/20 (2006.01);
U.S. Cl.
CPC ...
B21C 25/04 (2013.01); B21C 23/085 (2013.01); B21C 23/205 (2013.01); B21C 23/217 (2013.01); B21C 25/08 (2013.01);
Abstract
If a mandrel for extruding metal pipes, having two axially offset pressing surfaces with different radial characteristics and having a transition region between these two pressing surfaces has a support surface in the transition region then the negative effect of narrowing, which arises owing to the mandrel shifting from a first pressing position, in which the first of the two pressing surfaces interacts with a die, to a second pressing position, in which the second pressing surface interacts with the die, can be minimized.