Hydraulic metering control

Details Hydraulic metering control Hydraulic metering control

A - Human Necessities

01

C

222/69.9

A01C 19/00 (2006.01) A01C 3/06 (2006.01)

Patent

CA 1271171

HYDRAULIC METERING CONTROL ABSTRACT OF THE DISCLOSURE An apparatus for field application of particulate solids from an elongated boom carried on a self-propelled vehicle wherein the discharge rate of the particulate solids is accomplished through the utilization of a metering control system. The metering control monitors the rotation of a delivery screw for controlled application rate with the application rate being proportional to vehicle speed, and wherein the application rate is rapidly responsive to changes in rate of speed of the vehicle. A variable capacity fluid pump is driven from the vehicle final drive shaft, with the pump supplying hydraulic fluid to a hydraulic motor providing the energy for driving the metering screw. The variable capacity pump is preferably an axial piston pump having a variably positionable swash plate.

542105

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