Drill bit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 29, 2018
Issued Date -
N/A
app pub date -
Jun 25, 2015
filing date -
Jun 25, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A drill bit has a shank, an intermediate shaft, and a cutting head and defines a longitudinal axis. The cutting head has a body having a front end, a rear end, and a peripheral sidewall, a primary cutting insert and a pair of auxiliary cutting inserts. The primary cutting insert is cross-shaped with a central portion with a cutting tip and four cutting arms each with a cutting edge extending radially outward from the central portion past the peripheral sidewall. The auxiliary cutting inserts are spaced radially outward from the central portion and circumferentially from the radial cutting arms, and have a cutting edge extending radially outward past the peripheral sidewall. A pair of primary dust egress slots and a pair of auxiliary dust egress slots are formed in the peripheral sidewall and configured to channel debris from the front end to the rear end of the body.
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