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:
Jan. 20, 2009
Filed:
Jun. 30, 2004
Stephan Kuschel, Hamburg, DE;
Stephan Kuschel, Hamburg, DE;
Daimler AG, Stuttgart, DE;
Abstract
In a method for the production of a rim hole in hollow profiles, a tubular piece is pushed into the hollow profile and placed there in such a way that it coaxially surrounds the location of the rim hole to be produced. The hollow profile is then acted upon from outside to inside at this location by a tool, with the rim hole being formed. In order to make possible a rim hole in hollow profiles in a relatively simple manner, this rim hole also satisfying high strength requirements even in the case of a small wall thickness of the hollow profile, it is proposed to first punch two opposite holes out of the hollow profile. At least one of these holes has a diameter which is smaller than that of the rim hole to be produced. The tubular piece is then inserted into the hollow profile interior, so that it comes to lie there coaxially to the common axis of the holes. The hollow profile material of the hollow profile section located between the hole edge and the inside of the tubular piece is then drawn into the hollow profile interior by at least one punch until it bears flat against the inside of the tubular piece.