Coal and rock cutting pick

Details Coal and rock cutting pick Coal and rock cutting pick

2005-07-19

2005-07-19

Singh, Sunil (Department: 3673)

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Planar type bit

C299S101000, C299S108000

Reexamination Certificate

active

06918636

ABSTRACT:
The pick (1) includes a radially inner end (4) and a shank (3) to be fixed to the drum (10) to substantially prevent relative movement between the pick (1) and drum (10). The pick (1) further includes a cutting head (2) having leading (5) and trailing faces (6) intersecting to provide a cutting edge (8) to extend generally parallel to an axis. The leading face (5) in use is inclined by an acute rake angle R to a radius of the axis, with the trailing face (6) being inclined at an acute back clearance angle B to a plane passing through the edge (8) and normal to the radius. The leading face (5) and trailing face (6) being inclined by an acute angle and the shanks when fixed to the drum (10) extends at an acute angle to the radius.

REFERENCES:
patent: 1573505 (1926-02-01), Radford
patent: 3239275 (1966-03-01), Belugou
patent: 3357117 (1967-12-01), Petersen
patent: 4274677 (1981-06-01), Proctor
patent: 4415208 (1983-11-01), Goyarts
patent: 4915455 (1990-04-01), O'Neill et al.
patent: 5235961 (1993-08-01), McShannon
patent: 5520444 (1996-05-01), Kosobrodov et al.
patent: 12672/97 (1997-04-01), None
patent: 2605986 (1977-08-01), None
patent: 1573505 (1980-08-01), None
patent: 2 121 087 (1983-12-01), None
Dawood, A. D., “The Design of Coal and Rock Cutting Systems With Particular Reference to Debris Size Distribution”, The University of New South Wales School of Mining Engineering, Faculty of Applied Science, vols. I and II, Oct. 1984, pp. 1-429 and Appendices.

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