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:
Nov. 30, 1976
Filed:
May. 22, 1975
Applicant:
Inventor:
Goran Dahlman, Helsingborg, SW;
Assignee:
Allmanna Svenska Elektriska Aktiebolaget, Vasteras, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72 60 ; 72264 ;
Abstract
A press for hydrostatic extrusion of tubes includes a die having a die opening therein and a mandrel projecting into the die opening and forming therewith a gap for shaping the tubular billet into a tube. The mandrel includes a carrier with a bore therein and a tip inserted in and filling the bore of the carrier. The tip includes an outer sleeve of hard metal and a core filling the sleeve formed of a material which has approximately the same E-modulus of the material of the carrier, such as steel. The inner end of the sleeve is enlarged and the front part of the carrier is compressed around the tip to fix the tip axially in the carrier.