Liquid application unit for air seeders

Details Liquid application unit for air seeders Liquid application unit for air seeders

A - Human Necessities

01

C

A01C 7/06 (2006.01) A01C 1/00 (2006.01) A01C 7/04 (2006.01) A01C 15/00 (2006.01) A01C 19/00 (2006.01) A01C 23/00 (2006.01)

Patent

CA 2273447

A liquid application unit for use on air seeders is provided which is cost-effective, has low maintenance and is highly reliable. This unit permits farmers to apply liquid substances, i.e. seed treatment substances to particulate material, namely seeds, just prior to the seed being inserted into the soil. The system uses an auger having two different pitches of flighting and/or different diameter flighting such that the volume available in between pitches of the flighting on the portion of the auger outboard of the orifice is greater than the volume available between the pitches inboard of the orifice. Chemicals are applied downstream of a sump area where the auger has either a larger pitch or larger diameter such that the volume available to the seed in the downstream area of the sump is greater. This will allow for better mixing action and minimize any effects on metering accuracy caused by build-up of chemicals on the flighting. In this device seed and chemicals are mixed by the rotation of the auger flighting within its cylinder.

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