Tamperproof fastener
US4125051A · kind A · utility
24Cited by
0References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Jun 9, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/919
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A threaded fastener with a low profile head designed to prohibit unauthorized removal. The upper surface of the head is configured to include a very short cylindrical boss, coaxial of the fastener and a plurality of ribs extending radially outwardly therefrom formed on an otherwise flat, circular flange. The ribs include a perpendicularly disposed driving surface of low height extending from the flat surface and an angled camming surface intersecting with the driving surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.