发明名称 |
LIQUID DRIVEN IMPACT DEVICE |
摘要 |
Liquid driven impact device provided with a housing (1) and a hammer piston (2) movable to-and-fro therein. The hammer piston is provided with channels (8) which when the hammer piston (2) passes the impact position supplies pressure liquid to a valve body (9) for locking this for continuous supply of pressure liquid to a first surface (4) on the hammer piston (2) and to a flushing channel (6) for continuous flushing of a drill hole.
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申请公布号 |
WO9841726(A1) |
申请公布日期 |
1998.09.24 |
申请号 |
WO1998SE00447 |
申请日期 |
1998.03.12 |
申请人 |
ATLAS COPCO ROCK DRILLS AB;EKWALL, BERNDT;NORDBRANDT, ANDREAS |
发明人 |
EKWALL, BERNDT;NORDBRANDT, ANDREAS |
分类号 |
E21B4/14;(IPC1-7):E21B4/14;E21B21/00 |
主分类号 |
E21B4/14 |
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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