| 摘要 |
Disclosed is a spreader for broadcasting particulate materials in a controlled pattern of distribution comprising a container for holding the material to be dispensed, means connected to the container for facilitating movement of the container in a direction for travel, a rotatable plate mounted to the container for receiving dispensed material from the container and for distributing the material, a mechanism for rotating the plate, a deflector connected to the container for controlling the distribution of the material, the deflector being movable about the plate, a track attached to the container for supporting the deflector, a port disposed between the container and the plate for passing dispensed material and a port closure element connected to and movable with the deflector for selectively blocking the port.
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