Excavation machine with a pivotable kelly bar
US8632275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2009 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Jun 20, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/083
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An excavation machine including —a mast having a longitudinal direction, —a bar presenting a first end provided with an excavation tool, and —a carriage movable along the longitudinal direction of the mast and including a first holder member for holding the bar relative to the carriage, the carriage being suitable for moving the bar along the longitudinal direction of the mast. The first holder member is pivotable relative to the carriage and by the fact that the first holder member presents a locked state in which the bar is prevented from moving in translation relative to the carriage, and an unlocked state in which the bar is free to move in translation relative to the carriage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.