Impact device with a rotable control valve
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United States of America Patent
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Nov 6, 2007
Grant Date -
Feb 16, 2006
app pub date -
Aug 19, 2005
filing date -
Feb 21, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impact device includes a frame to which a tool is connectible, and a stress element that is supported on the frame and disposed between the frame and the tool. A hydraulic control system leads pressurized hydraulic fluid into and out of a hydraulic fluid space such that the stress element causes a stress pulse in the tool. The hydraulic control system includes a rotatingly installed control valve that has control openings for intermittently leading the hydraulic fluid out from the hydraulic fluid space.
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