US PATENT SUBCLASS 299 / 57
.~.~.~ Cooperates with laterally spaced heads

Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

29  DF  HARD MATERIAL DISINTEGRATING MACHINES {17}
55  DF  .~ Rotary cutter head with advance direction coincident to rotary axis {2}
56  DF  .~.~ With material-handling means {1}
57.~.~.~ Cooperates with laterally spaced heads

DEFINITION

Classification: 299/57

(under subclass 56) Apparatus in which the cutting means comprises a plurality of cutter heads and the axes about which the heads are moved are spaced in a direction transverse to said axes.