Anti-tamper nut
US4897008A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Oct 17, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5898
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A locknut including an annular locknut body having a threaded inner surface and an outer surface, a locknut shroud rotatably mounted on the locknut body and having an inner surface facing the outer surface of the locknut body, an annular ridge on the outer surface of the locknut body defining a first shoulder, a second shoulder within the annular shroud, an O-ring mounted on an inclined surface of the locknut body and bearing against an inclined surface on the annular shroud to force the first and second shoulders into abutting engagement, an annular space between the inner surface of the annular shroud and the outer surface of the locknut body, and a plurality of lobes on the outer surface of the locknut body and located in the annular space for receiving a mating key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.