Abstract: A liquid sprayer apparatus of the type in which liquid is caused to flow from a liquid supply tank, through a spray conduit, to a spray nozzle assembly. The spray nozzle assembly comprises: an adapter mounted to the spray conduit; and a spray nozzle holder; and a spray nozzle configured to produce a flat fan spray pattern. The nozzle is received in the nozzle holder, and the holder is coupled to the adapter such that the nozzle adjoins the adapter in a secure assembly. A self orienting indexing system, associated with the adapter and the nozzle, orients the nozzle in either one of two orthogonal bearing positions relative to the adapter upon the coupling of the holder to the adapter. The self orienting system includes a plurality of indexing holes contained in the adapter and a plurality of matching indexing spurs projecting from the nozzle.

Abstract: A continuous sprayer has a trigger-actuated piston assembly within a cylinder. The trigger urges the piston assembly distally in the cylinder and a coil spring urges it proximally against action of the trigger. The piston assembly has a plunger portion and a hollow piston rod that extends out through a sliding seal in the cylinder distal end and on which is mounted a spray nozzle. The hollow piston rod contains a shutoff rod that cooperates with a standard spring bias ball valve contained in the plunger. At the distal end of the shutoff rod there is a seal to cause complete shutoff as the rod is urged against a compression spring and mates with a seat in the nut of the nozzle. A shutoff pin at the proximal end of the cylinder contacts the shutoff rod when the trigger is completely released and the piston assembly travels to its extreme proximal position.