Rock drill
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 10, 2002
Grant Date -
N/A
app pub date -
Sep 15, 2000
filing date -
Sep 16, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Drills, particularly rock drills, with a chisel shank and a drill head with at least one drill bit or tool bit on a face pointing in a feed direction have the tool bit formed of at least one cutting edge provided on the face side between a rake surface and a free surface with the rake surface being in the direction of rotation of the drill and being ahead of the cutting edge. The free surface has at least a portion which extends into the drill bit over at least one sub-area to form a concave depression.
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Cited Art Landscape
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