Boring or penetrating the earth – Bit or bit element – Core forming type
Reexamination Certificate
2011-07-26
2011-07-26
Wright, Giovanna C (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Core forming type
C175S395000, C175S405000
Reexamination Certificate
active
07984773
ABSTRACT:
A drill bit for core sampling includes a body having a central axis and first end having a tapered outer surface and a radius transverse to the central axis, and an insert having a cutting surface on the first end oriented at an axial angle relative to the radius to move material displaced during drilling away from the first end.
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Longyear TM, Inc.
Workman Nydegger
Wright Giovanna C
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