Blind rivet assembly
US4580936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1984 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Feb 29, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B19/008
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A blind, self-plugging rivet assembly for securing together two members (42, 43) is of the type comprising a tubular shell (13) with an enlarged head (14) at one end, and a stem (12) which extends through the bore (15) of the shell, the stem having an enlarged head (38) beyond the tail end (18) of the shell. The shell has a weakened zone (19) formed by three slits (22) extending along part of the shell shank and spaced apart equiangularly around it. The stem head (38) lies beyond the shell tail end, and has an underhead surface (39) which is slightly convex and is bounded by a sharp edge (40). The stem has a pulling portion (32) connected by a breakneck to a plugging portion (31) which is an interference fit in the shell bore. Adjacent the breakneck the plugging portion has a cylindrical skirt which, when the rivet has been installed, can be deformed outwardly to lock the plugging portion to the shell. A bead on the stem guides the tool for deforming the skirt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.