Rock drill
US4074771A · kind A · utility
16Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Mar 25, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock drill assembly and more particularly a rock drill assembly having improved fluid power means therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.