Shearable fastener
US7214108B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2003 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R4/307
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shearable fastener has a threaded shank adapted for engagement with a threaded bore and a head portion formed for engagement with a drive tool, the shank being formed with a series of axially separated weakenings defining a series of shear planes. The weakenings are formed such that the applied torque necessary to cause the shank to shear increases progressively from the shear plane furthest from the head portion to the shear plane nearest the head portion. The weakenings are holes, grooves or slits formed in the shank and the radius at the bottom of the holes, grooves or slits is varied to produce or contribute to the increase in shear torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.