Lock washer
US8186919B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2009 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Jun 14, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B39/108
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lock washer includes a planar washer body formed of a sheet of resilient metal having a selected thickness no less than the pitch thread of the bolt with which it is to be used. First and second lock tabs integral with the body extend radially outward of the central aperture, wherein each of the tabs has a radially inward facing, straight, free edge transverse to a radius of the body, and each of the tabs is displaced by a spring bend to one side of the plane of the body. The washer body is etched to a selected lesser thickness in the area of the spring bend to provide a selected spring force when the tab is pushed down to the plane of the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.