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:
Sep. 18, 2001
Filed:
Dec. 17, 1999
Harald Garth, Munich, DE;
Krauss-Maffei AG, München, DE;
Abstract
The invention concerns a bending device (,) comprising two shaping dies (,) with shaping chambers (,) in order to round a sheet bar (,) about a core (,). The peripheral lengths of the two shaping chambers (,) are each longer than half the bushing circumference. During a pre-shaping step, the core (,) penetrates a first chamber (,) by a depth which is greater than the bushing radius. The sheet bar (,) is thus shaped in the form of a U. In an intermediate shaping stage, an auxiliary core (,) is placed on the core (,) such that, as the second shaping die (,) moves downwards, only the end of the U-legs of the sheet bar blank (,) are shaped arcuately. When the auxiliary core (,) and part (,) of the first shaping die (,) have been removed, the final bushing shaping process occurs, in which the second shaping die (,) likewise travels over the center of the bushing. The three-stage bending method enables a bushing to be rounded highly accurately and carefully.