US PATENT SUBCLASS 299 / 29
HARD MATERIAL DISINTEGRATING MACHINES

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

29HARD MATERIAL DISINTEGRATING MACHINES {17}
30  DF  .~> Remote control
31  DF  .~> Stepper-type advance-causing means {1}
33  DF  .~> With mine roof-supporting means
63  DF  .~> Cutting kerfs to form block
34.01  DF  .~> Cutter attached to endless chain or cable (e.g., planer type) {8}
35  DF  .~> Wire saw-type cutter
36.1  DF  .~> Floor-working {3}
42  DF  .~> Sidewall-working (e.g., drum-type cutter) {4}
55  DF  .~> Rotary cutter head with advance direction coincident to rotary axis {2}
64  DF  .~> With material-handling means {3}
69  DF  .~> Percussive-type cutter {1}
71  DF  .~> Relatively shiftable cutters
72  DF  .~> Shiftable to operate in vertical or horizontal cutter tooth orbit
73  DF  .~> Cutter shiftable horizontally {2}
76  DF  .~> Cutter shiftable vertically
77  DF  .~> Horizontal cutter tooth orbit
78  DF  .~> Vertical cutter tooth orbit

DEFINITION

Classification: 299/29

(under the class definition) Apparatus comprising a cutting means and a power operated means to drive or advance said cutting means to cut, sever or break up hard material.

(1) Note. For classification under this definition more of the machine must be claimed than a cutter tooth, plural cutter teeth or their immediate supporting or driving means, such structure merely comprising a cutter head. A cutter head or tooth is defined in subclass 79 of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.05+, for a mining machine having an automatic control, signaling or indicating feature.

20+, for an expansible device for breaking down material.

SEE OR SEARCH CLASS 173, Tool Driving or Impacting, appropriate subclass for an apparatus of general utility for driving a tool.