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. 15, 1977
Filed:
May. 07, 1976
Bernhard Max Willimzik, Mechernich-Katzvey, DT;
GRANGES NYBY AB, , SW;
Abstract
A mandrel, in particular a floating mandrel, for the cold drawing and/or sizing of tubes comprising a drawing portion and a shoulder portion section, wherein corresponding to the various functional requirements which are made of its different sections the mandrel consists of two or more different portions which are joined to form a resilient structure and comprise between them at least one intermediate space whose volume is variable by resilient deformation of the mandrel portions and/or relative movement of the mandrel portions with respect to each other, and is substantially completely sealable by engagement of the mandrel portions on the inner wall of the tube to be drawn.