COUPLING ARRANGEMENT FOR COUPLING ROCK DRILL SHANK
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Apr 24, 2008
filing date -
Apr 25, 2007
priority date (Note) -
Abandoned
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Abstract
The invention relates to a coupling arrangement for coupling a drill shank of a rock drill unrotatably but axially movably. The coupling arrangement comprises power transmission members between the surfaces of the drill shank and the rotation bushing, which transmission members rotate along the surfaces, as the drill shank moves longitudinally to the rotation bushing, and transmit the rotation torque from the rotation bushing to the drill shank.
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