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:
Mar. 07, 2006
Filed:
Oct. 18, 2001
Rudolf Singer, Engelstadt, DE;
Hubertus Gölitzer, Alzenau, DE;
Rudolf Singer, Engelstadt, DE;
Hubertus Gölitzer, Alzenau, DE;
Umicore AG & Co. KG, Hanau, DE;
Abstract
A process for the production of tubular structural parts fabricated from PGM materials and having circumferential undulating bulges by forming from smooth-walled tube pieces. A smooth-walled tube piece () is inserted into a cylindrical forming die () with an internal diameter that corresponds substantially to the external diameter of the tube piece and that has radial undulating recesses (). This die is provided at both axial ends with a press tool () that tightly seals the tube ends. The space that is thus formed is completely filled with an hydraulic fluid (), and an hydraulic internal pressure is then produced by exerting an axial compression via the press tools () in such a way that under simultaneous shortening of the tube piece bulges () are formed in the wall of the latter that correspond to the recesses () of the forming die ().