Cutter head for pit-boring machine

Details Cutter head for pit-boring machine Cutter head for pit-boring machine

1981-10-27

1984-05-15

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175336, 175376, 175391, 299 86, 299 90, E21B 1028, E21B 1016

Patent

active

044482698

ABSTRACT:
A rotatable cutter head for a pit boring machine used in reverse circulation drilling. The cutter head has cutter arrays including rotary cutters and drag cutters and disposed radially and circumferentially spaced positions on the cutter head, the drag cutters having the cutting ends lying generally in a conical plane having the axis coaxial with the axis of rotation of the cutter head. The rotary cutters each have cutting teeth around the circumference thereof and each tooth has an inclined side face lying in a further conical plane the central axis of which is coaxial with the axis of rotation of the rotary cutter, the inclined side face of each tooth facing generally along the inclination of the conical plane in which the cutting ends of the drag cutters lie, and the tip of each cutting tooth of each rotary cutter projecting beyond the plane in which the cutting ends of the drag cutters lie.

REFERENCES:
patent: 1460671 (1923-07-01), Hebsacker
patent: 3139148 (1964-06-01), Robbins
patent: 3379264 (1968-04-01), Cox
patent: 3493165 (1970-02-01), Schonfeld
Lassen et al., Neue Schachtbautechnik, Gluckauf, vol. 115, No. 9, 1979, p. 383.
Trosken: Erfahrungen etc., Gluckauf, vol. 99, No. 24, p. 1334, 1963.
Technische Umschau, Gluckauf, issue of Jul. 9, 1979, p. 701.
Catalog Alfred Wirth & Co., 1970, pp. 1-11.
Schlagel und Eisen, Apr., 1966, pp. 184-186.
Baumaschine und Bautechnik, Feb. 2, 1957, pp. 41-42.

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