发明名称 |
Rock bolting equipment |
摘要 |
Equipment for drilling holes in mine roofs for the purpose of rock bolting comprises an intermediate portion having mounted on and extending from it at one end a telescopic leg and mounted on and extending from it at the other end a drill rod, a hydraulic motor mounted on the intermediate portion and coupled to the drill rod, first valve means adapted to be connected to a pressure fluid source for supplying pressure fluid to the leg for extending it or for releasing fluid from the leg, second valve means adapted to be connected to a pressure source for supplying pressure fluid to the hydraulic motor for driving it or for releasing fluid from the motor and means for controlling the first and second valve means.
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申请公布号 |
US4010806(A) |
申请公布日期 |
1977.03.08 |
申请号 |
US19720307228 |
申请日期 |
1972.11.16 |
申请人 |
THE TITAN MANUFACTURING COMPANY PROPRIETARY LIMITED |
发明人 |
BROADBENT, KENNETH JOSEPH |
分类号 |
E21B19/086;(IPC1-7):E21C1/10 |
主分类号 |
E21B19/086 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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