Patent ID: 8336470
Filing Date: 2012-12-25
Classification: A01C

Abstract:
1. A covered agricultural metering device having a dispensing tube, a rotating metering disc for metering an agricultural product and dispensing said metered product through said dispensing tube, and a cover separating said metering disc from an ambient environment, the metering device using positive pressure air from an air source for temporarily retaining said agricultural product on said metering disc, the metering device having an air cutoff shelf substantially blocking positive air to a portion of the metering disc as it rotates with respect to the shelf thereby enabling the metered product to fall from said metering disc and through said dispensing tube, wherein said cover comprises a main body having a first opening generally sized and configured to generally correspond with said metering disc, said cover substantially preventing air flow to the ambient environment from the metering disc during dispensing of metered product from the metering disc and recirculating positive pressure air passing between said metering disc and said cover through the metering device.