Cutter bit

Details Cutter bit Cutter bit

1993-06-28

1994-08-02

Bagnell, David J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

407 7, 407 64, F21B 1050, E21C 3518

Patent

active

053339380

ABSTRACT:
A cutter bit having a concave face surface has a base surface spaced from the concave face surface and a recess extending inwardly from the base surface, The recess is adapted to receive a portion of a tool holder that extends at least partially into the recess, A bearing member is interposed the body of the cutter bit and the portion of the tool holder disposed in the recess.

REFERENCES:
patent: 4699549 (1987-10-01), Shimomura et al.
patent: 4730681 (1988-03-01), Estes
patent: 4738291 (1988-04-01), Isley
patent: 5078219 (1992-01-01), Morrell et al.
patent: 5261499 (1993-11-01), Grubb
Proceedings of International Symposium of Mine Mechanization and Automation, Golden, CO, Jun. 10-13, 1991, "The Development and Testing of the Concave Bit", by D. A. Larson et al.

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