#$%^&*AU2017232053A120180405.pdf#####ABSTRACT An air distribution apparatus including a manifold body and a plurality of ports defined through a wall of the manifold body. The apparatus also includes a delivery conduit connected to each one of the 5 plurality of ports. On at least one of the plurality of ports, a port valve configured to communicate an interior of the manifold body with the delivery conduit associated with the at least one of the plurality of ports. The apparatus also includes a supply conduit connected at an output end thereof to the interior of the manifold body and connected at an input end thereof to receive a product air stream with agricultural products entrained therein. The apparatus also includes an exhaust orifice 10 defined in the supply conduit and an exhaust valve configured to control a flow of pressurized air from an interior of the supply conduit through the exhaust orifice. The port valve and exhaust valve are controlled to operate oppositely to each other between open and closed positions of each valve such that when the port valve is in the closed position. The exhaust valve is in the open position with the delivery conduit being disconnected from the interior of the manifold body and, when the 15 exhaust valve is in the closed position, the port valve is in the open position and pressurized air from the interior of the supply conduit is prevented from flowing through the exhaust orifice. The port valve and the exhaust valve are adjustable to intermediate positions between the open and closed positions. 281/5 AS-4Bt2 19 Al 35 AS26A, 26 33A: '5A 113B 9B-313A A 27 1113 9 756B9A ,..2o； -35 1121 0 FIG, 1 21 -TB --,21 D21 33, AS--. DI~ii~ 1f I 5A~ F1G,3 25A -13 13B,-S, 98-s 3 '75 )B91A -111 =F4-27 29 --21 FIG, 2 3
