Title - Single-Grain Pneumatic Distributor with Low Drive Torque

Abstract

The low-torque pneumatic single-seed distributor consists of a vacuum chamber that is axially movable and radially restricted. This chamber adheres to the seeding disc, creating a vacuum seal. A spring presses the disc's leveling mechanism against the chamber. The vacuum between the chamber and the seeding disc draws the seeds into the holes on the side opposite the chamber. As the disc rotates, it rubs against the chamber's surface with minimal friction, as the vacuum area between the chamber and the disc is small, resulting in a minimal adhesive force. If the vacuum chamber is flexible, a stiffening seal is placed inside to reduce friction against the seeding disc. This seal supports the chamber walls against the vacuum created within the chamber.These seed distributors are placed one per planting unit of the seeders or planters, where they distribute the seeds evenly spaced.

Claims

1. A single-seed pneumatic distributor with low drive torque comprising a cover support (9) and a housing (14), inside which is the seeding disc (3), which is radially attached to the support plate (12) of the seeding disc (3) and axially fixed by the housing (14), which closes the assembly through which the seeds enter via the nozzle (1), being deposited in the seed collection zone (5), where the seeds are captured by the depression in the multiple holes (34) of the seeding disc (3), where as the seeding disc rotates it moves the seed adhered to each hole (34), passing through a seed leveling zone (2), which only allows one seed to pass per hole, to end its journey in the seed release zone (4) by the interruption of the depression, the seed detaching from the hole (34),characterized by having a flexible vacuum chamber (22) and a low-friction stiffening seal (21) between the seeding disc (3) and the flexible vacuum chamber (22), which is anchored to the fixing bracket (42) of the flexible vacuum chamber (22), which is fixed radially and axially to the cover bracket (9), wherein said low-friction stiffening seal has multiple stiffening supports (35) to prevent suction of the flexible vacuum chamber (22) due to excessive vacuum. Seven claims follow.