Collapsible fastener with plastic sleeve
US4416572A · kind A · utility
17Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | May 18, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/908
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A collapsible fastener comprises a tubular plastic having a head on one end for bearing against one surface of the work. There is an internally threaded tail portion at the shank end of the sleeve. The shank is slotted to define strips which are notched internally and intermediate the ends. The slots increase in width from their ends to the area of the notches. A screw extends through the sleeve and is devoid of threads intermediate its ends to prevent overtorquing. A radially tapered annulus is positioned atop the sleeve for sealable engagement with the screw head in the assembled condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.