Mounting arrangements for mineral displacing tools
US4040584A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1976 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Feb 6, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mounting arrangement for a mineral displacing tool comprises a carrier for the tool and pivot means pivotally securing the carrier to a support. A link member is attached at one end to the pivot means, and first and second pressure-fluid-operated rams are pivotally connected to act between the other end of said link means and the carrier and the support, respectively. Each ram serves to extend the arc of slewing of the carrier with respect to the support attainable by means of the other ram. Preferably, one of the rams is arranged to slew the carrier in a clockwise direction from a given position, and the other of the rams is arranged to slew the carrier in a counter-clockwise direction from the given position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.