Sealed hinge

Details Sealed hinge Sealed hinge

1982-09-09

1984-08-07

Scanlan, Jr., Richard J.

Pipe joints or couplings

Variable length

285 7, 285 24, 285184, 98 50, 299 12, 299 64, F16L 0000, F16L 5500, F16L 2700, A47L 924

Patent

active

044639732

ABSTRACT:
An air duct system for use with mining machines in dust collection systems is connectable between a suction source and the cutting area of a mining machine and has two duct sections movable relative to each other. One duct section is mounted on the cutter boom of the mining machine and has an extendable upper wall, connected through a hinged plate, that abuts a wall of the first duct section which is mounted on the mining machine body. A lower hinged plate connected to the bottom wall of the duct swivels freely and rests on the bottom wall of the first duct to enclose the space between the two duct sections.

REFERENCES:
patent: 689894 (1901-12-01), Lutz
patent: 3362086 (1968-01-01), McLean
patent: 4380353 (1983-04-01), Campbell et al.

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