Rod and rod cup alignment apparatus for drilling machine
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United States of America Patent
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Sep 12, 2017
Issued Date -
N/A
app pub date -
Jan 22, 2016
filing date -
Jan 22, 2016
priority date (Note) -
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Abstract
A rod and rod cup alignment apparatus for a drilling machine has a receptacle for receiving a drill rod of the type having at least one rod flat, where the drill rod has a leading corner and a trailing corner relative to the direction of its rotation. The receptacle has at least one cup flat disposed on the inner surface of the receptacle and the cup flat further has a first top surface and a second top surface. The second top surface has a slope downward toward the bottom of the rod cup, so that, as the drill rod is lowered into the rod cup while the drill rod is rotating, the leading corner of the drill rod is caused to move downward along the second top surface, whereupon the trailing corner of the drill rod contacts the first top surface, thereby aligning the drill rod flat with the rod cup flat.
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