Patent ID: 7905428

Claim:
A sprayer, comprising: a sprayer outlet; a pressurizable reservoir containing a carrier liquid and air, the reservoir having an air-pressure outlet in communication with the air in the reservoir and a reservoir outlet in communication with the carrier liquid in the reservoir, the reservoir outlet being in fluid connection with the sprayer outlet; at least one pressurizable tank, each tank being detachable and containing a liquid chemical and air, each tank having a chemical outlet in communication with the liquid chemical in the tank and an air-pressure inlet in communication with the air in the tank, each air-pressure inlet being in direct connection with the air-pressure outlet of the reservoir such that air pressure in each tank is equal to air pressure in the; a selector valve adjustable between a plurality of settings for causing at least one selected chemical outlet to be in fluid connection with the sprayer outlet; and a ratio valve between the selector valve and the sprayer outlet for selecting a fluid flow rate out of the at least one selected chemical outlet; wherein carrier liquid flowing into the sprayer outlet from the reservoir outlet and liquid chemical flowing into the sprayer outlet from the at least one selected tank outlet are at equal pressures and are mixed together prior to discharge from the sprayer outlet; wherein the selector valve is in fluid connection with the chemical outlet of each tank through multiple inlets, and the selector valve has a single selector outlet in fluid connection with the sprayer outlet.