Spraying and dosing apparatus

Details Spraying and dosing apparatus Spraying and dosing apparatus

1986-12-11

1989-05-02

Huppert, Michael S.

Dispensing

With casing or support

Body carried and/or operated type

222309, 222334, B65D 8854

Patent

active

048260509

ABSTRACT:
In spraying liquid herbicides and insecticides, a predetermined dose is delivered in each operation of a dosing apparatus. The dosing apparatus comprises a piston-and-cylinder combination supported on a hangle. The piston is biased in one direction by a spring or by pressurized propellant, and movement of the piston in this one direction causes the liquid to flow into the cylinder through a check valve. Actuation of a trigger-operated valve releases pressurized propellant into the cylinder on the opposite side of the piston (or alternatively into an auxiliary cylinder) causing movement of the piston and discharge of the liquid through a second check valve and then through a spray nozzle. The dosing apparatus includes a portable backpack structure molded of a plastics material, and is especially suited for portable operation in remote locations. The backpack is formed with a reservoir for reagent and a compartment for removably holding a pressurized propellant container.

REFERENCES:
patent: 2789396 (1957-04-01), Jernander et al.
patent: 2889084 (1959-06-01), Tour
patent: 3353537 (1967-11-01), Knox et al.
patent: 3565298 (1971-02-01), Ohlin
patent: 3604592 (1971-09-01), Bacon et al.
patent: 3802511 (1974-04-01), Good, Jr.
patent: 3945571 (1976-03-01), Rash
patent: 3987869 (1976-10-01), Bowers
"Spray Gun Cuts Costs by More Than 75 PC", The Land, Jun. 17, 1982.

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