Rock drill
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United States of America Patent
Stats
-
Feb 25, 1986
Grant Date -
N/A
app pub date -
Mar 21, 1984
filing date -
Apr 5, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rock drill for percussion drilling comprises frontal and gauge button inserts, said frontal button inserts being parallel with the longitudinal axis of the rock drill and said gauge button inserts being inclined at an angle relative to said longitudinal axis and arranged to define the diameter of the hole drilled by the rock drill. The number of the frontal button inserts is two and the number of gauge button inserts is two.
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Cited Art Landscape
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