Multi-lobular lockbolt
US7677852B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Nov 2, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/041
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A lockbolt which includes a head portion and a shaft which extends from the head portion. The shaft includes at least a portion which is threaded and has a multi-lobular profile. A collar is swageable onto the multi-lobular threaded portion, and thereafter the lobes provide that the collar does not tend to vibrate loose from the threading. The fact that the section which has a multi-lobular profile is also threaded provides that the collar (or a conventional threaded nut) can be selectively rotatably removed and re-installed on the lockbolt. Before swaging, the collar may initially include a cylindrical bore, or a bore which is multi-faceted, preferably generally corresponding to the profile of the multi-lobular portion of the lockbolt. The lockbolt may also include a frangible pintail, wherein the multi-lobular threaded portion is disposed between the head portion of the bolt and the frangible pintail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.