Concave cutter bit

Details Concave cutter bit Concave cutter bit

1991-10-14

1995-10-10

Bagnell, David J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Insert or tip mounting feature

299106, E21C 35183

Patent

active

054565227

ABSTRACT:
A concave cutter bit which has a bit body that contains a concavity in the axially forward end thereof. A plurality of cutter inserts are brazed to the bit body at the periphery of the open end of the concavity. The cutter inserts are spaced-apart in such a fashion so that a gap exists between adjacent cutter inserts that is of sufficient size to prevent the formation of a continuous braze joint between any adjacent cutter inserts.

REFERENCES:
patent: 3519309 (1970-07-01), Engle et al.
patent: 3752515 (1973-08-01), Oaks et al.
patent: 3791465 (1974-02-01), Metge
patent: 4222446 (1980-09-01), Vasek
patent: 5007685 (1991-04-01), Beach et al.
patent: 5078219 (1992-01-01), Morrell et al.
patent: 5135035 (1992-08-01), Mills
patent: 5333938 (1994-08-01), Gale
Properties and Proved Uses of Kennametal hard carbide alloys, p. 43, Copyright 1972 Brazing Manual, American Welding Society, 1963 pp. 232-236.

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