Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore
Patent
1991-08-29
1992-09-01
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Bit with leading portion forming smaller diameter initial bore
175394, 175431, 175432, 299 87, 299 90, 299 91, E21B 1044, E21B 1056, E21B 1062
Patent
active
051431637
ABSTRACT:
A replaceable digging tooth for an earth auger including a generally oblong body member and a shank depending from the body member and receivable in a support block of the earth auger. The body member includes an elongated leading surface, an elongated trailing surface and first and second side surfaces. The leading surface, trailing surface and first and second side surfaces terminate in a forward working face having a plurality of inserts. Each insert has a generally cylindrical portion integral a top portion which tapers to a point to form a conical tip. The tips of the inserts are aligned to define a linear cutting line which is inclined with respect to a reference plane perpendicular to the axis of the shank and the axes of the inserts are aligned parallel to form a cutting plane which is inclined with respect to the reference plane.
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"Texoma Auger Tooling Products" brochure, Reedrill Inc., Sherman, Texas.
Beach Wayne H.
Frost Robert L.
Stiffler Stephen P.
Waite David J.
Kennametal Inc.
Meenan Larry R.
Novosad Stephen J.
Prizzi John J.
Reedrill Inc.
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