Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Reexamination Certificate
2007-02-12
2009-02-03
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
C175S104000, C175S327000
Reexamination Certificate
active
07484576
ABSTRACT:
A drill bit has a body intermediate a shank and a working face and has an axis of rotation. The working face has at least one cutting element and the body has at least a portion of a jack assembly. The jack assembly has at least a portion of a shaft disposed within a cavity formed in the body of the drill bit, the shaft having a distal end extending from an opening of the cavity formed in the working face. The jack assembly also has an electric motor and/or generator.
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Hall David R.
Miskin Ben
Wilde Tyson J.
Dang Hoang
Wilde Tyson J.
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