Patent ID: 7665409

Claim:
An agricultural seed planting system, comprising: a middle section having a middle air manifold; a right section having a right hollow support frame and a left section having a left hollow support frame; said left section and right section are coupled to said middle section; a plurality of planting units pneumatically coupled to said left hollow support frame, said right hollow support frame and middle air manifold; a fan pneumatically coupled to left hollow support frame; wherein said left hollow support frame, right hollow support frame and middle air manifold is configured to route air flow between the plurality of planting units and the fan, and said left support frame, right support frame and middle air manifold are configured to structurally support the plurality of planting units; a first conduit having opposing ends; first end coupled to said fan and second end coupled to left hollow support frame; a second conduit having opposing ends; said one end coupled to said fan and opposing end coupled to a junction on said middle air manifold; a third conduit having opposing ends; said one end coupled to said junction and opposing end coupled at right hollow support frame; at least one of said first, second, and third conduits being of a different diameter than the other conduits.