Roof bolt drill pot drive
US4856384A · kind A · utility
17Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Sep 2, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D20/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mining roof bolt drill pot drive wherein the drill chuck and the bolt tightening socket are coaxially mounted and permanently coupled to and simultaneously driven by a drive motor. The drill chuck is directly driven by the drive motor and the bolt socket is driven via a reduction planetary gear box giving speed reduction and torque multiplication. An automatic valve for supplying cooling water to the drill during drilling and allowing excess water together with expended sheer pins to be discharged from the base of the drill pot is also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.