Fastener collar removal tool
US4762030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Oct 21, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/001
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool for removal of round internally threaded collars from high efficiency aerospace fasteners. The tool includes a central cylindrical pin having a head at one end held against rotation, a non-round extension at the second end and a transverse bore intermediate the ends, containing a ball which is spring biased to project slightly beyond the pin wall. A mandrel assembly surrounds the pin and is rotatable relative thereto. A gripping collet is positioned between the mandrel and pin with collet fingers at one end extending beyond the mandrel and a threaded second end threaded into said mandrel. An axial slot in said collet is adapted to receive said ball when aligned therewith to form a releasable latch mechanism. In operation, the open collet fingers are placed over a threaded collar with said extension in engagement with a corresponding recess in the end of the bolt within the collar. The socket and mandrel are rotated in the collar unthreading direction. The latch mechanism latches the pin and collet together, preventing rotation of the collet. This causes the mandrel to thread into the collet and move downwardly forcing the fingers to grip onto the collar and bringing friction…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.