Power feed system for a rotary drill
US4539893A · kind A · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | May 23, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01B15/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a power feed system for translating a rotary drill head along the length of a guide tower. The system utilizes a compound balanced area, end fed hydraulic cylinder as the actuating means. This arrangement provides a large ratio of fixed overall length to usable travel distance, balanced feed force in both directions, direct connection of the rotary head to the outer stage of the cylinder, and drift-free operation, all without the need for moving hydraulic hoses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.