Portable, self-powered, adjustable herbicide dispensing system

Details Portable, self-powered, adjustable herbicide dispensing system Portable, self-powered, adjustable herbicide dispensing system

1984-11-29

1987-01-13

Rolla, Joseph J.

Dispensing

With discharge assistant

Motor operated

222309, 222341, 222389, 239322, G01F 1106

Patent

active

046358307

ABSTRACT:
A piston-operated spraying device dispenses a metered amount of liquid. A valve is connected through conduits to a cavity in front of the piston, to a cavity in the rear of the piston, to a pressure supply, to a supply of liquid to be sprayed, to a nozzle, and to a vent for releasing the pressure. In the open position the valve connects the rear cavity to the pressure supply, and the front cavity to a nozzle so that any liquid in the front cavity will be dispensed. In the closed position the valve connects the rear cavity to the vent for releasing the pressure, and the front cavity to the supply of liquid so that a spring can drive the piston to the rear, thereby allowing the front cavity to be filled by the liquid and preparing the device for another delivery.

REFERENCES:
patent: 1764823 (1930-06-01), Bowlus
patent: 2789396 (1957-04-01), Jernander et al.
patent: 3207384 (1965-09-01), Wall

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