Apparatus for wall timbering of drifts, tunnels, and the like
US4540065A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1983 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Dec 28, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus mounted on a self-propelled truck, and provided with mechanisms for effectively, smoothly, and safely performing various timbering work in drift and tunnel walls and roofs. The mechanism includes a working platform which is rotatable and kept horizontal for easy conveyance of timbering materials even in a narrow drift and for steady performance of timbering by workers on the platform. Planting of props is readily performed by a device provided to the platform, which grasps a prop, shifts it and erects the prop over a selected pit, and bridging of top beams over capitals of planted props is accurately made by lifting means provided on the working platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.