Hopper door operating mechanism

Railway rolling stock – Special car bodies – Dumping

Patent

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Details

105240, 105280, 105284, 105299, 298 35M, B61D 300

Patent

active

056069162

ABSTRACT:
A hopper door operating mechanism includes an arcuate closing plate mounted on an internal shaft pivotably connected to the frame of the hopper door. An operating crank has one end connected to the internal shaft and the other end pivotably connected to a link arm. The link arm has motors pivotably connected at opposite ends of the link arm. The closing plate can be rotated to open the hopper door in either direction depending on the discharge direction. To open and close the closing plate in a first direction, the first motor is operated to move the link arm and rotate the closing plate while the second motor is maintained in a closed position to retain one end of the link arm as a fulcrum point. To open and close the closing plate in the opposite direction, the second motor is operated to move the link arm while the first motor is maintained in a close position to retain end of the link arm as a fulcrum point.

REFERENCES:
patent: 3316859 (1967-05-01), Floehr
patent: 4225110 (1980-09-01), Akkerman
patent: 4541294 (1985-02-01), Bormioli
patent: 4759477 (1988-07-01), Gelinas
patent: 4964348 (1990-10-01), Flowers et al.
patent: 5115748 (1992-05-01), Westlake
patent: 5144895 (1992-09-01), Murray
patent: 5261333 (1993-11-01), Miller
patent: 5275303 (1994-01-01), Szalai
patent: 5359942 (1994-11-01), Ward
patent: 5402731 (1995-04-01), Miller
Morrison Knudsen Corporation, Rail Systems Group: Phase VI (undated).

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