Abstract: A hydrostatic spraying system with multiple spray booms for use with vehicles is especially suited for spraying agricultural treatment liquids such as fertilizers, herbicides, insecticides, trace minerals, etc. The system includes an operator-controllable variable displacement hydraulic pump driven by the vehicle, e.g., via its transfer case. A linear hydraulic motor is powered by the pump, being operated at a speed dependent upon a preselected output of the variable displacement pump and the rate of ground travel. Solenoid-controlled valving alternately supplies the hydraulic fluid to opposite ends of the linear motor for oscillating stroking operation of the motor.

Abstract: A spraying system for use with vehicles which comprises a single pump connected to a supply of liquid material to be discharged, a vehicle transmission connecting said pump operatively to the transfer case of the vehicle, said pump having a pair of discharge ports each of which is connected to a diverter valve. Each diverter valve on one side being connected to a spray boom and on the other side thereof is in communication with a liquid return line. The spray booms are independently vertically and horizontally adjustable relative to the vehicle by means of fluid actuated devices. Each diverter valve is remotely controlled, independently of the other, for selectedly directing liquid to the associated spray boom or to the return line.