Breakaway tamperproof fastener
US5651652A · kind A · utility
Inventors
Key dates
| Filing date | Sep 19, 1996 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Sep 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/913
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elongate fastener that may not be removed without destruction is provided for insertion in adjacent cooperating holes defined in box structures and their closure elements to maintain closure. The fastener defines a head, larger than the hole to carry the fastener, that structurally carries a peripherally extending tab to aid manual manipulation. The head structurally connects an elongate perpendicularly extending body that fits in the cooperating holes and is formed by spaced peripheral webs that carry barb-like fasteners in their end portions distal from the head that allow insertion of the body through a hole by deformation, but thereafter expand responsive to retentent memory to prevent removal. The interconnection of the body and head is weaker in tensile strength than the material on either side of the interconnection so that the head may be removed from the body by manual manipulation of the peripheral tab, without the use of tools, to allow opening of the box structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.