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:
Apr. 19, 2005
Filed:
Sep. 10, 2003
Markus Gehrig, Schaffhausen, CH;
Christian Leppin, Schaffhausen, CH;
Pius Schwellinger, Tengen, DE;
Alcan Technolgy & Management Ltd., Neuhausen, CH;
Abstract
A process for forming an initial section or like component featuring a hollow interior to a final shape by high internal pressure in the sealed hollow interior using a medium that can flow. In order to shape-form the initial section featuring at least one corner region—preferably at least two corner regions—the wall sections adjacent to the corner region are preshaped in a curved manner—as viewed in cross-section—counter to the direction of applied pressure, and subsequently re-shaped by applying the high internal pressure of the medium that can flow, displacing the corner region in the direction in which the pressure is applied. To that end a section with hollow space delimited by section walls is employed in which two section walls define each corner region of the section cross-section, whereby at least one of the section walls at the corner region features a region that is curved in cross-section. Preferred is a polygonal cross-section, the section walls of which feature the inwards curved region between each of the corner regions or, such in which selected section walls connecting two corner regions each feature a curved region.