Coal dust removal and conveyance system
United States Patent 3387889
US Patent References:
Coal mining machine
- - 2100178
Apparatus for mining coal
- - 2375689
Apparatus for the removal of cuttings from drill holes
- - 2740609
Tunneling machine having suction exhaust means
- - 3005627
Method and apparatus for rock dusting during coal mining operations
- - 3333896
Coal mining machine
- - 2100178
Apparatus for mining coal
- - 2375689
Apparatus for the removal of cuttings from drill holes
- - 2740609
Tunneling machine having suction exhaust means
- - 3005627
Method and apparatus for rock dusting during coal mining operations
- - 3333896
Inventors:
Ziemba, Stanley C.
Ziemba, Josephine A.
Ziemba, Josephine A.
Publication Date:
06/11/1968
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Primary Class:
Other Classes:
55/385.500, 299/68, 261/94, 175/206, 261/115, 55/442, 96/299
International Classes:
E21C35/22; E21C35/00