Mining or in situ disintegration of hard material – Miscellaneous
Patent
1986-08-14
1988-03-08
Whitehead, Harold D.
Mining or in situ disintegration of hard material
Miscellaneous
175410, F21B 1000
Patent
active
047296038
ABSTRACT:
A cutter including a chisel wheel having an axis of rotation about which the wheel is adapted to rotate during a cutting operation; a plurality of cutting tools each including a tool body having a longitudinal axis, a chisel bit and a chisel shank; the chisel wheel carrying chisel holders which freely rotatably mount each cutting tool for rotation about its associated axis, each chisel bit being a separate hard metal body fixed to an end portion of its associated tool body remote from its associated shank, each chisel bit having a cone shaped working section merging toward an apex portion, a plurality of peripherally spaced axially extending grooves formed in the cone-shaped working section which automatically rotate each cutting tool about its longitudinal axis during the operation of the chisel wheel, and each longitudinal axis setting-off with a plane normal to the axis of rotation of the chisel and included angle of up to generally 45.degree. which ensures uniform wear of each chisel bit, particularly its apex portion, during operation of the chisel wheel.
REFERENCES:
patent: 465748 (1891-12-01), Baumotte
patent: 973887 (1910-10-01), Steinmetz
patent: 1685196 (1928-09-01), Gilbert
patent: 3140749 (1964-07-01), Dionisotti
patent: 3268259 (1966-08-01), Snipe
patent: 3356418 (1967-12-01), Healey
patent: 3361481 (1968-01-01), Meddock
patent: 3388757 (1968-06-01), Fittinger
patent: 3493268 (1970-02-01), Bower
patent: 3884212 (1975-05-01), Armstrong
patent: 4065185 (1977-12-01), Elders
patent: 4159746 (1979-07-01), Wrulich
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