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:
May. 14, 2002
Filed:
Apr. 29, 1996
Sumanjit Singh, Gaimersheim, DE;
Stuart Edmond Blacket, Queensland, AU;
Trevor B. Jones, Bolton, GB;
Howard J. Litherland, Clywd, GB;
Audi AG, , DE;
Abstract
The self-penetrating fastening device proposed consists of a rivet ( ), acted on by a punch ( ), and a die ( ), the rivet consisting of a head ( ) and a shank ( ) with a central cavity ( ) whose open end partly penetrates a metal sheet ( ) in which it is held. At the end of the rivet shank ( ) remote from the rivet head ( ), the cavity ( ) is essentially conical in shape, the angle of the aperture being &agr;. In addition, the transition zone between the rivet shaft ( ) and the underneath ( ) of the rivet head ( ) is essentially rounded (R ). A rivet joint produced using this device is sufficiently strong to meet severe requirements, and the surface of the metal sheet in the region of the rivet is not affected by the perforation process.