B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
77/35
B23B 51/02 (2006.01) E21B 10/44 (2006.01) E21B 10/58 (2006.01)
Patent
CA 1324013
ABSTRACT OF DISCLOSURE A cutting tip to be carried by a drill bit for rotation in a first direction and useful in drilling holes in stone and masonry materials wherein the tip is planar and has a point defined by first and second surfaces intersecting at a point and third and fourth flank edges extending generally parallel to the longitudinal axis and where the leading edge of at least one of the flank edges. determined by the direction of rotation, is chamfered.
557950
Pennington Donald C. Jr.
Perley-Robertson Hill & Mcdougall Llp
Vermont American Corporation
LandOfFree
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