Ratchet locking mechanism for threaded fastener
US8784027B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2011 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B39/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastening device including a fastener having a head portion and an elongated threaded body portion extending axially from the head portion. The threaded body portion includes opposing flat sections. A lock washer has a lower surface with an array of radially extending engagement teeth. The lock washer also defines an axial aperture for receiving the fastener. The axial aperture has two flat inner surfaces for cooperating with the two flat sections of the threaded body portion to prevent relative rotation of the washer and threaded body portion. A threaded lock nut mates with the threaded body portion. The lock nut has an upper surface with at least one cantilevered pawl members for ratcheted engagement with the array of radially extending engagement teeth of the lock washer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.