| 摘要 |
A flap of an elastomeric material is disposed over an outlet opening in a dust box within a main hopper of an industrial-type sweeper, the outlet opening providing communication between the dust box and the main hopper for emptying of the contents accumulated within the dust box. The flap is positioned over the outlet opening and is operative to provide selective communication between the dust box and the main hopper. During dirt and debris collection, such is accumulated within the dust box, while during emptying the dirt and debris are allowed to fall into the main hopper for egress through the hopper inlet. In one embodiment, the main hopper door controls the selective communication of a slotted flap through connection of one end of the flap to the hopper door. In another embodiment, air pressure regulates the opening and closing of the flap.
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