Ventilation – Mine – Having inlet ductwork
Patent
1992-03-17
1993-06-08
Joyce, Harold
Ventilation
Mine
Having inlet ductwork
E21F 104
Patent
active
052174069
ABSTRACT:
Mine ventilation tubing system for use in a mine tunnel including a plurality of tubing sections having, in transverse cross section, three sides connected together by three radiused corners, one of the corners having a substantially larger radius than the other two corners. A mounting assembly mounts the tubing sections in the tunnel with the one corner having the larger radius located closely adjacent the intersection of one of the side walls with the ceiling of the tunnel. In its mounted position, a first of the tubing section sides is located closely adjacent the ceiling, and a second of the tubing section sides is located closely adjacent the side wall such that the tubing sections are positioned out of the way of equipment travelling or operating in the tunnel.
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patent: 2801065 (1957-07-01), Moir et al.
patent: 4011726 (1977-03-01), Cooper, Jr.
patent: 4235163 (1980-11-01), Divers
patent: 4530865 (1985-07-01), Sprenger
McGill Robert R.
Toth Mick E.
Joyce Harold
Peabody Coal Company
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