Spherical bit

Details Spherical bit Spherical bit

E - Fixed Constructions

21

B

255/72

E21B 10/00 (2006.01) E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/28 (2006.01) E21B 10/40 (2006.01) E21B 10/52 (2006.01)

Patent

CA 1234096

SPHERICAL BIT ABSTRACT OF THE INVENTION A rotary bit having a pair of semi-spheres rotating about a shaft extending from a center tongue. The semi-spheres include a plurality of cutters arranged in a predetermined fashion to maximize cutting efficiency. The semi-spheres may be disposed slightly off-center from the bit's axis of symmetry to bias the bit in a particular direction.

449916

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