Multi-tier security fastener
US6017177A · kind A · utility
200Cited by
12References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/91
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A multi-tier security fastener in the nature of a nut or bolt having a body with a first tier having a lobed drive surface, and second and third cylindrical tiers on opposite sides of the first tier, with all three tiers having different effective diameters. The second and third cylindrical tiers can have irregularities in the nature of a lobe or a depression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.