Thread repair tool
US4346491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1979 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Nov 13, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23G9/009
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention, in its preferred form, involves a pair of complementary substantially half-nut sections adapted to be manually assembled about a stud having a damaged thread to be repaired, the side walls of the half-nut sections being substantially arcuate to form a cylinder when assembled, to receive a socket adapted at one end to snugly slide over the assembled nut sections to retain them in their assembled positions. To preclude relative rotation between the socket and the assembled nut sections, one or both half-nut sections is provided with a planar slope intersecting the proximate arcuate outer surface, which planar slope is adapted to be engaged by a pin passing through the socket along a cord thereof, when the socket is slipped over the assembly nut sections. Upon application of pressure and a simultaneous turning force to the socket, either clockwise or counterclockwise in accordance with desired direction of travel, while being clamped against the same, in the course of which, the assembled nut-sections will repair the damaged thread or threads. The threads are preferably so designed as to essentially reform or mold the material of the damaged threads back into the origin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.