Spraying device with dilution control

Claim 1

IN A SPRAYING DEVICE OF THE TYPE WHICH INCLUDES AN ELONGATED CONDUIT, THE WALL OF WHICH DEFINES A FLUID INLET END FOR RECEIVING A SUPPLY OF PRESSURIZED FLUID, A FLUID OUTLET END, AN INTERNAL BORE WHICH HAS A PORTION OF RELATIVELY RESTRICTED DIAMETER INTERMEDIATE SAID ENDS SO AS TO FORM A SUCTION ZONE, AND A SUCTION PASSAGE COMMUNICATING THROUGH THE WALL WITH THE SUCTION ZONE FOR INTRODUCING FLUID INTO SAID SUCTION ZONE, SAID SPRAYING DEVICE FURTHER INCLUDING ADJUSTABLE ORIFICE MEANS ASSOCIATED WITH SAID SUCTION PASSAGE FOR SELECTIVELY POSITIONING DEFFERENT-SIZED ORIFICES ACROSS SAID PASSAGE, THE IMPROVED CONSTRUCTION FOR SAID ADJUSTABLE ORIFICE MEANS WHICH COMPRISES A CYLINDER HAVING A LONGITUDINAL AXIS AND A PLURALITY OF LONGITUDINALLY SPACED GROUPS OF DIFFERENT-SIZED PASSAGEWAYS EXTENDING TRANSVERSELY THERETHROUGH, THE EXTREMITIES OF SAID PASSAGEWAYS OF EACH GROUP BEING CIRCUMFERENTIALLY SPACED FROM EACH OTHER; AND MEANS MOUNTING SAID CYLINDER TRANSVERSELY OF SAID SUCTION PASSAGE FOR ROTATION ABOUT THE LONGITUDINAL AXIS OF SAID CYLINDER AND FOR LONGITUDINAL MOVEMENT ALONG SAID AXIS WHEREBY ONE END OF EACH OF SAID PASSAGEWAYS THROUGH SAID CYLINDER MAY BE PLACED IN REGISTER WITH SAID SUCTION PASSAGE.