Patent ID: 7878431

Claim:
A rotary feeder for feeding a particulate material comprising: a) a cylindrical housing comprising a feeder inlet, a first feeder outlet, and a second feeder outlet; b) a rotor mounted in the cylindrical housing comprising a plurality of impeller blades defining a plurality of circumferentially spaced pockets alignable with the feeder inlet, first feeder outlet, and second feeder outlet, and adapted to sweep a wall of the cylindrical housing as the rotor rotates in the cylindrical housing; c) a device for rotating the rotor; and d) a separating screen in the first feeder outlet to substantially prevent oversize material from exiting through the first feeder outlet, wherein the separating screen comprises a bar grate, wherein each of the plurality of circumferentially spaced pockets will align with the feeder inlet to receive therein a particulate material and an oversize material through the feeder inlet, rotate in the cylindrical housing to align with the first feeder outlet and discharge the particulate material therefrom, and rotate in the cylindrical housing to align with the second feeder outlet after alignment with the first feeder outlet and discharge the oversized material therefrom.