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:
Dec. 05, 1978
Filed:
Dec. 06, 1977
Applicant:
Inventors:
Hans Meurer, Monchen-Gladbach, DE;
Klaus Rehag, Monchen-Gladbach, DE;
Assignee:
Wean United, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72 97 ; 72209 ;
Abstract
The disclosure of the present invention concerns a piercing rolling mill with a mandrel changing device which has at least two groove-like recesses which can be positioned alternately in the rolling line in order to hold the mandrels, and a retractable mandrel stripper, and where the mandrel rod carries at its front end a pin on which the mandrel is attached in such a way that it is detachable against the effect of expanding springs or similar means.