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:
Jan. 12, 1993
Filed:
Feb. 19, 1992
Applicant:
Inventor:
Helmut Isgen, Willich, DE;
Assignee:
Rheinmetall GmbH, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 54 ; 72 61 ; 29-111 ;
Abstract
An autofrettage device for a tube includes thrust bearings for receiving opposite ends of the tube. A mandrel is introducible into the tube and includes a sealing arrangement for sealing an annular gap between the mandrel and an inner wall of the tube against escape of a pressure medium supplied to the annular gap. A mandrel holder including a ball joint socket supports the end of said mandrel so that the mandrel is pivotally movable relative to the mandrel holder.