Patent ID: 6145455
Filing Date: 2000-11-14
Classification: A01C,A01M,Y10S

Abstract:
An agricultural material metering system comprising:a rotatable metering member configured to meter agricultural material upon being rotated;a hydraulically driven rotary actuator coupled to the metering member to rotate the metering member;a variable displacement pump adapted to be fluidly coupled between a source of hydraulic fluid and the rotary actuator, wherein the pump is actuatable between a first position in which the pump displaces fluid at a first rate and a second position in which the pump displaces fluid at a second rate;a rotatable ground driven member coupled to the pump to drive the pump when rotating; andan actuator coupled to the variable displacement pump and configured to actuate the variable displacement pump between the first and second positions to vary rotational velocity of the rotary actuator, to vary rotational velocity of the metering member and to vary rates at which material is metered.