| 摘要 |
A hopper discharge device including a hopper with discharge opening, a pair of door support guides, a door slidingly engaging the guides for opening and closing the hopper discharge opening and a rotatable shaft with one or more sprocket wheels adapted to engage the door in rack and pinion manner for opening and closing the door. The door is provided on its undersurface with one or more longitudinally extending channel members, each channel member containing a section of roller chain therein. The sprocket wheels mesh with the rollers of the flexible roller chain to prevent build-up of ice, dirt, grain particles, and other debris in the sprocket wheel's contact with the chain. A wear strip of anti-friction material on the door facilitates the opening and closing of the door.
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