Thread locking/prevailing torque fastener and fastener assembly
US7722304B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2008 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B39/30
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A thread locking fastener assembly comprising a nut anchor defining an internal thread having a longitudinal axis, a leading face and a trailing face, the internal thread, in axial section, having a profile which is symmetric about a first imaginary line extending radially out from the axis, and a fastener shank having an external thread with a longitudinal axis, a leading face and trailing face, the external thread being received in said internal thread so that said axes are substantially coincident. The external thread, in axial section, has a profile with a radially inner base zone which is symmetric about a second imaginary line extending radially from the shank axis and a radially outer deflectable addendum which is not symmetric about that line so that the addendum prevents axial centralization of the external thread profile in the internal thread profile unless a sufficient axial force is applied to the shank to deflect the addendum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.