Variable dilution ratio hose-end aspirator sprayer

A multiple dilution ratio aspirator sprayer adapted to be connected to a hose for mixing a liquid with pressurized water from the hose and providing a spray of the mixture, comprising:

• a container for housing the liquid to be mixed with the water;
• a mixing head having a through bore having a straight line axis aligned with a nozzle at one end of said head and means for attaching a water base at the other end of said mixing head;
• a mixing chamber formed between an upstream motive tube and a downstream motive tube within said mixing head, said upstream motive tube including a sleeve member having a flow area therethrough of substantially the same diameter as said downstream motive tube and substantially smaller than the diameter of said mixing chamber, and said mixing chamber having a length shorter than the diameter thereof;
• feed tube means for communicating liquid from said container to said mixing head;
• control means having a plurality of orifices of differing areas therein rotatably mounted in said mixing head between said feed tube means and said inlet to said mixing chamber for controlling flow of liquid from said container to said mixing chamber;
• valve means for controlling water flow through said motive tubes and said mixing chamber, said mixing chamber volume and the diameter of said orifice control the dilution ration with vater flowing therethrough, and
• a cleaning orifice in said mixing head, said cleaning orifice being circumferentially spaced from said mixing chamber so that each of said plurality of apertures may be selectively aligned therewith for cleaning.

A multiple dilution ratio aspirator sprayer adapted to be connected to a hose for directly mixing and diluting a liquid with pressurized water from the hose to provide a spray of the mixture, comprising:

• a container for housing the liquid to be mixed with the water;
• a mixing head removably attachable to said container including a cylindrical bore having a single axis extending longitudinally therethrough, said bore terminating in a spray nozzle at one end and means for attachment to a water supply hose at the other end thereof;
• said single axis cylindrical bore including motive tube means formed therein and having a mixing chamber of larger diameter than said motive tube means, and said mixing chamber being intermediate the ends of said motive tube means;
• tubing means for communicating liquid from said container to inlet means into said mixing chamber in an undiluted form;
• a rotatable control disk having a plurality of apertures therein mounted in said mixing head for rotation in a plane parallel to said cylindrical bore, at least one of said apertures being smaller than 0.0081 inches in diameter;
• said disk being interposed between said tubing means and said mixing chamber inlet such that a selected one of said plurality of apertures of differing areas is alignable with said tubing means for controlling the flow of liquid from said container into said mixing chamber;
• and
• means for flowing water through said motive tube means to create a reduced pressure in said mixing chamber and through said control disk aperture to draw undiluted liquid from said container through said tubing means and into said mixing chamber for dilution with pressurized water at a dilution ratio determined by the area of the aperture that is aligned with the tubing means and the volume of said mixing chamber.