Locking fastener
US5314279A · kind A · utility
Inventor
Key dates
| Filing date | Jan 28, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Jan 28, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/79
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A locking threaded fastener of the wedge-action type is disclosed with threaded and threadless nut members with wedge elements therebetween for wedging the nut members apart when the threaded nut member is turned in the loosening direction. In a two-piece nut, the threadless nut member has a flat inner surface for engaging the workpiece and the wedge elements have engaging surfaces with a coefficient of friction therebetween which is less than that between the flat inner surface and the workpiece surface. In a three-piece nut, a third nut member, in the form of a washer, is provided with a flat inner surface for engaging the workpiece. The wedge elements have engaging surfaces with a coefficient of friction less than that between the third nut member and the threadless nut member which, in turn, is less than that between the third nut member in the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.