Tramlining device for seed drill

Details Tramlining device for seed drill Tramlining device for seed drill

1979-10-01

1981-09-15

Scherbel, David A.

Dispensing

Automatic control

239172, 222611, 222625, 222486, 111 25, A01C 718

Patent

active

042892562

ABSTRACT:
A tramlining device is provided for a seed drill having shutters associated with respective seed spouts and controlled by individual fluid pressure operated actuators for improved flexibility in selecting the tramline spacing. The actuators are preferably such that when pressurized they close the shutters to produce tramlines. Fluid pressure is tapped from the rams that force the coulters into work. Preferably, a control valve in the fluid supply line comprises a valve member that is urged closed by the supply pressure but is opened by a plunger controlled by a bout register. Preferably, a solenoid operated plunger is provided to override operation of the bout register.

REFERENCES:
patent: 3584788 (1971-06-01), Lloyd
patent: 3606264 (1971-09-01), Rosselot
patent: 3622253 (1971-11-01), Horton et al.
patent: 4023707 (1977-05-01), Johnson

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