Auger cutter head

Details Auger cutter head Auger cutter head

1991-08-09

1992-10-27

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Bit with leading portion forming smaller diameter initial bore

175394, 299 87, E21B 1044

Patent

active

051581477

ABSTRACT:
An auger cutter head includes a rotatable body that is mountable on an auger and a plurality of cutting assemblies spaced about the outer wall of the rotatable body to drill a hole in the ground as the auger cutter head is rotated and advanced into the ground. Two of the cutting assemblies include outside chisel bits positioned to ream or gauge the hole as the cutter head is rotated and advanced. All of the flighting sections, bit, blocks, and blade assemblies provided in the cutting assemblies are offset in a radially inward direction relative to the two outside chisel bits to reduce the wear and tear on those components. Each of the chisel bits is oriented to rotate relative to its bit block about a predetermined axis of rotation to reduce wear caused by uneven loading on the rotatable chisel bits during drilling of the hole.

REFERENCES:
patent: 3375890 (1968-04-01), Petersen
patent: 4380271 (1983-04-01), Baker et al.
Auger and Soil Sampling Tools Catalog, Mobile Drilling Co., Inc., 1990, pp. 2-1 to 2-13 and front and back covers.
Bulletin 3788-A, Supplement to Mobile Drilling Co., Inc., Catalogs 182 & 747, Effective Jan. 26, 1989, pp. 1-4.
Mills Machine Company Brochure, 1989, pp. 1-4.

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