PNEUMATIC DRILLING APPARATUS Russian patent published in 2009 - IPC A01C7/04 

FIELD: agriculture.

SUBSTANCE: pneumatic drilling mechanism has a tanker, housing, seed and discharge chambers, vertical seeding plate with dosage elements having orifices, pressurised channel. The seeding plate has a drive shaft for the rotational motion. Ledges are disposed at the equal distance one the centre circles of the dosage elements of the seeding plate. The ledges are made of elastic material. The width and high of the ledges are not less than maximum size of planting seeds. The walls of the ledges are radial from the side of the dosage elements of the seeding plate. The housing has a slot having the length equalled the distance between the ledges. A conveying channel with the walls having elastic covering is disposed in the housing in front of the area of throwing seeds into a coulter along the arc of the concentric axis of the seeding plate. The central angle of the conveying channel is not less than double angle between the neighbouring ledges of the seeding channel. The radial section of the ledges in the plane perpendicular to one of the seeding plate patterns on the cross section of the conveying channel. The walls of the ledges attached to the walls of the conveying channel are made along the radiuses which are smaller than one of the walls of the conveying channel by gaps' size of 0.03…0.05 mm.

EFFECT: qualitative increase of dosing seeds at high revolution of the seeding plate with decreasing excessive pressure and air consumption.

3 dwg