Patent ID: 7752984

Claim:
An agricultural implement comprising: a pair of primary containment unit mounted to a frame for holding and dispensing a granular product; a plurality of sections for secondary containment of said granular product; a device for controlling a dense phase transport of a granular product through a dense phase delivery line including at least one side wall defining a passageway that extends from an intake end connected to said primary containment unit for receiving pressurized air and the granular product to a discharge outlet connected to said plurality of sections for secondary containment of said granular product, the device comprising: a porous medium located along a portion of the at least one side wall of the dense phase delivery line upstream of the discharge outlet, the porous medium providing a fluid pathway between an inner volume of the passageway of the dense phase delivery line and a volume outside of the dense phase delivery line; and a control cover moveably positionable proximate the porous medium for selectively controlling a flow of the pressurized air from the inner volume of the passageway through the porous medium; wherein, when pressurized air and the granular product are provided on the intake end of the dense phase delivery line, the control cover can be moved from a first position that permits the dense phase transport of the granular product through the dense phase delivery line and out the discharge outlet to a second position that inhibits the dense phase transport of the granular product through the dense phase delivery line without stopping an upstream flow of the pressurized air.