Rotationally and axially movable bit

Details Rotationally and axially movable bit Rotationally and axially movable bit

1990-02-13

1991-05-28

Kisliuk, Bruce M.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

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

299 92, E21C 2546, E21C 3518

Patent

active

050187937

ABSTRACT:
The present invention relates to an improved cutting bit adapted to be rotationally and axially movable within the block cutting bit assembly. The invention further includes a spring for dampening the axially transmitted forces which the bit is subjected to during cutting operations. In an alternative embodiment, a retainer cap having a pin engages a lug on the shank of the cutting bit so as to bias the bit during cutting operations.

REFERENCES:
patent: 3820848 (1974-06-01), Kniff
patent: 4149753 (1979-04-01), Stoltz et al.
patent: 4755003 (1988-07-01), Pinkerton et al.

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