Down-the-hole drill hammer
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United States of America Patent
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N/A
Issued Date -
Mar 3, 2005
app pub date -
Nov 4, 2004
filing date -
Dec 21, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to an arrangement pertaining to down-the-hole hammers in which a driver (7) is adapted to transfer torsion forces between a rotating outer tube (10) and a drill bit (1) of the hammer, wherein the outer tube (10) surrounds all of the driver (7).
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