Locking mechanism for fastener
US4941787A · kind A · utility
15Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B43/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bolt shank and washer have contiguous respective elliptical and circular surfaces that interact to impart an undulated axial distortion to the washer in a circumferentially running sinusoidal way, so that the washer acts in spring-like fashion to lock the bolt in its tightened position. The elliptical surface is tapered outwardly toward the bolt head to give an increased spring constant with increased tightening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.