Auger bit

Details Auger bit Auger bit

2005-10-18

2005-10-18

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Bit with leading portion forming smaller diameter initial bore

C175S385000, C175S394000

Reexamination Certificate

active

06955234

ABSTRACT:
An auger has an outer blade and a center bit. The outer blade includes an outer ring and an inner hub, and the center bit inserts into the inner hub. The outer ring has an array of circumferentially-spaced teeth, and the inner hub is inwardly spaced from the outer ring by an array of inner spokes. Each spoke in the array of inner spokes also has a bladed portion for removing material. The center bit has a drill bit-shaped tip, a toothed cone, and a shaft all concentrically aligned with the outer ring and with the inner hub. The toothed cone includes at least one blade outwardly protruding from the toothed cone, and the shaft inserts into the inner hub to center the center bit with the outer ring and with the inner hub. The drill bit-shaped tip centers the auger bit, and the array of circumferentially-spaced teeth moves soil and cuts roots. The at least one blade outwardly protruding from the toothed cone also moves soil and cuts roots.

REFERENCES:
patent: 2401250 (1946-05-01), Kandle
patent: 2650083 (1953-08-01), Robbins
patent: 2688465 (1954-09-01), Birdwell
patent: 2749102 (1956-06-01), Goodrich
patent: 2838285 (1958-06-01), Gredell
patent: 3092190 (1963-06-01), Gruere
patent: 3508622 (1970-04-01), Sturgeon et al.

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