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. 31, 2009
Filed:
Apr. 04, 2003
Applicant:
Keijo Hellgren, Västerås, SE;
Inventor:
Keijo Hellgren, Västerås, SE;
Assignee:
Avure Technologies AB, Vasteras, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 26/02 (2006.01); B21D 22/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method and a device for expansion forming of an article. According to at least one aspect of the invention, an expansion forming tool is pressure-compensated from two sides, pressure differences on each side being equalized by means of a pressure transmitter, which is applicable to the tool.