Two-prong rotary bit, especially for use with roof drills,...

Details Two-prong rotary bit, especially for use with roof drills,... Two-prong rotary bit, especially for use with roof drills,...

B - Operations, Transporting

23

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B23B 51/00 (2006.01) E21B 10/54 (2006.01) E21B 10/58 (2006.01) E21B 10/60 (2006.01)

Patent

CA 1220059

TITLE OF THE INVENTION A TWO-PRONG ROTARY BIT, ESPECIALLY FOR USE WITH ROOF DRILLS, AND INSERT THEREFOR ABSTRACT OF THE DISCLOSURE Disclosed according to the present invention is a two-prong rotary drill bit, especially for use with roof drills. The two-prong bit has a supporting body having an axis of rotation. The two-prong bit has a pair of inserts, one insert on each of the prongs. Each of the inserts has a cutting portion facing in the direction of rotation and a mounting portion. When viewed in a direction parallel to the axis of rotation, each of the inserts will have a cross sectional configuration which is generally wedge-shaped. Also disclosed are wedge shaped inserts especially for use with roof drill bits.

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