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.
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
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