| 摘要 |
<p>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.</p> |
