Double rod cylinder feed system
US5343962A · kind A · utility
17Cited by
28References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Aug 16, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/084
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic system for moving a drilling head in a rectilinear motion between a mast crown and a mast table on a drilling machine includes a double rod hydraulic cylinder connected at a bottom end to a mast table and at a top end to a traveling sheave block; first and second flexible connector members for connecting a drilling head to the mast through the sheave block; and hydraulic feed circuitry for actuating the cylinder to move the sheave block and drilling head alternately in a first pulldown direction and in a second pullback direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.