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. 25, 1979
Filed:
Nov. 03, 1977
Applicant:
Inventor:
Eduard J Huydts, Dusseldorf-Gerresheim, DE;
Assignee:
G. Siempelkamp GmbH & Co., Krefeld, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72402 ; 72367 ; 72452 ;
Abstract
An apparatus for the external calibration (sizing) of tubular elements such as longitudinally welded large-diameter pipes, comprises an outer support ring, a wedging mechanism connected to this ring, and a plurality of pipe-engaging calibrating elements which are closed against the external surface of the pipe as the latter is drawn through the apparatus to impart the desired external diameter thereto. According to the invention, the outer support ring forms a cylinder within which an annular piston is displaceable, the piston being formed with surfaces inclined to the axis of the pipe and acting directly or indirectly upon the pipe-engaging elements.