Agricultural crop sprayers

Claim 1

IN AN AGIRCULTURAL CROP SPRAYER, THE COMBINATION OF A WHEELED FRAME, A PAIR OF BOOMS PROJECTING LATERALLY TO OPPOSITE SIDES OF SAID FRAME, EACH OF SAID BOOMS INCLUDING A HORIZONTAL BOOM RAIL AND A SPRAY NOZZLE-EQUIPPED TUBE CONNECTED IN SPACED PARALLEL RELATION TO SAID BOOM RAIL, FLEXIBLE COUPLING MEANS CONNECTING THE INNER ENDS OF SAID RAILS OF SAID BOOMS TO SAID FRAME FOR MOVEMENT OF THE BOOMS IN VERTICAL AND HORIZONTAL PLANES, A PAIR OF CASTERS PROVIDED AT THE OUTER ENDS OF SAID BOOMS, ADJUSTABLE MEANS SECURING SAID CASTERS TO SAID BOOM RAILS OF THE BOOMS, AND RADIUS RODS EXTENDING FROM SAID FRAME TO SAID CASTERS, SAID ADJUSTABLE CASTER SECURING MEANS AND SAID COUPLING MEANS BEING ADJUSTABLE TO PERMIT ROTATION OF SAID BOOM RAILS ABOUT THE AXIS THEREOF, WHEREBY TO VARY THE HEIGHT OF SAID NOZZLE-EQUIPPED TUBES ABOVE THE GROUND WITH ALL PORTIONS OF EACH NOZZLE-EQUIPPED TUBE BEING AT THE SAME ELEVATION IN ANY GIVEN POSITION OF ADJUSTMENT.