Blind rivet with a tapered locking mechanism
US5599147A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | May 2, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B19/1054
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A blind rivet fastener which has a bulb forming collar that is assembled by sliding the collar down the shank of the fastener stem. The bulb collar is seated adjacent to the head of the stem. The stem has a shoulder and a pull portion that extend through the inner channel of a sleeve. The sleeve, shoulder and stem head are typically inserted into the matching holes of two workpieces. The sleeve has a head located at an accessible side of the workpieces and an opposite chamfered end located at an inaccessible "blind" side of the workpieces. The fastener is installed by holding the sleeve while pulling the shoulder through the sleeve channel. The stem head pushes the bulb collar, which engages the chamfered end of the sleeve. The bulb collar has an inwardly tapered end which bends the sleeve in a radially outward direction. The deformed end and sleeve head secure the sleeve to the workpieces. The fastener also has a locking collar which is bent by the moving stem into corresponding grooves of the sleeve and stem. The stem is pulled until the serrated pull portion breaks away from the stem shoulder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.