Mechanical truss wrench
US5505562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1995 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Feb 9, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mechanical truss wrench for use with a mine roof bolting machine. The wrench includes a casing having a locking bracket pivotably secured to the exterior. An input shaft extends into the casing and is positioned at a right angle to an output shaft extending out of the casing. The lower end of the input shaft is secured to the torquing member of the mine roof bolting machine. In operation, a socket on the output shaft is engaged with a head of a horizontally extending torquing bolt or similar tensioning mechanism of a truss-type mine roof utilizing U-bolts. The input shaft is rotated about a vertical axis to operate a gear train to rotate the output shaft and the socket to torque the bolt. A locking member with tabs coacts with the legs of a U-bolt or similar tensioning mechanism to prevent the casing from rotating about the axis of the input shaft and a guiding member is provided to assist in guiding the torquing bolt into the socket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.