Security fastener
US4312614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1979 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Nov 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/309
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is described a tamper-proof fastener for use in security applications, the fastener comprising inner and outer members interconnected by flexible straps. The inner and outer members each comprise a leading end, a shank, and a trailing end, the shank of the outer member consisting of two substantially parallel legs defining between them an open-sided passage which contracts towards the leading end, and the leading end of the outer member consisting of two limbs which define between them an open-sided space and converge to a tip where they are interconnected, each limb being connected to a respective leg and presenting an external shoulder facing away from the tip and an internal shoulder facing towards the tip, the trailing end of the outer member including outwardly extending portions presenting an external shoulder facing the leading of the outer member. The inner member is initially positioned so that its leading end lies in the open-sided passage, the leading of the inner member is capable of moving longitudinally to a position within the leading end of the outer member, shoulders formed on the leading end of the inner member then engaging the internal shoulders of the out…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.