Self-penetrating fastening system
US6385843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1996 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Apr 29, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5343
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The self-penetrating fastening device proposed consists of a rivet (3), acted on by a punch (13), and a die (15), the rivet consisting of a head (4) and a shank (6) with a central cavity (8) whose open end partly penetrates a metal sheet (1) in which it is held. At the end of the rivet shank (6) remote from the rivet head (4), the cavity (8) is essentially conical in shape, the angle of the aperture being &agr;. In addition, the transition zone between the rivet shaft (6) and the underneath (11) of the rivet head (4) is essentially rounded (R1). 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.