Drill bit tube
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United States of America Patent
Stats
-
Oct 14, 1997
Grant Date -
N/A
app pub date -
Apr 9, 1996
filing date -
Apr 27, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drill bit includes a one-piece cylindrical drill bit tube having a longitudinal axis and defining cylindrical surfaces including an inner cylindrical surface and an outer cylindrical surface. At least one of the cylindrical surfaces is configured to include deformations comprising at least one of embossments and recesses, all of the deformations appear over an entire length of the tube. At least some of the deformations are finite over the at least one of the cylindrical surfaces, the deformations further being adapted to stiffen the tube in the longitudinal direction without additional material reinforcements being disposed on the tube. The drill bit further includes hard-metal cutting elements disposed on a front face of the tube.
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