Damping and drilling machine including such a damping device
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United States of America Patent
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Jun 14, 2011
Grant Date -
Aug 6, 2009
app pub date -
Dec 6, 2006
filing date -
Dec 22, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A damping device for inserting into a housing of an impulse producing drill machine, for damping Shockwave reflexes from a drill string connected to the drilling machine, is distinguished in that a first damping piston (7) for direct or indirect action against the drill string and for applying a pressure in the direction of the drill string an a second damping piston (9) for applying pressure in the direction against the drill string against a fixed stop (11) arranged in the housing, wherein the first (7) and the second damping piston (9) are arranged to co-operate for joint damping action with a drill bushing or shank adapter in a certain relative position. The invention also concerns a drilling machine.
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