Cheeking device, particularly for the hanging roof in mines, underground working points, or heading and similar
US4871214A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C37/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a device for removing boulders loosened by an explosion, from the hanging roof of a mining gallery. The device is a pole which supports a pneumatic hammer and a striking head at one end thereof and a gripping handle at its opposite end. The handle has a trigger mechanism for remote control of the pneumatic hammer. The inner section of the striking head is a formation of hollow, honeycombed cells, for reducing the weight of the striking head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.