US Patent 10058021 Seeder with metering system having selectively powered metering sections

An agricultural seeding machine includes a metering system and a damper arrangement. The metering system for the seeding machine includes selectively powered metering sections operable to individually allow or restrict seed dispensation. The damper arrangement is included so that pneumatic conveying of the particulate within the machine is consistently maintained when particulate flow is varied between the metering sections.