Abstract: A rotary sprinkler device having a fluid inlet adapted to be secured to a water line, a nozzle head defining a plurality of differently configured or sized outlet orifices therein, a body member disposed between the fluid inlet and the nozzle head, a bearing spindle at least partially disposed within the body member and selectively communicating the fluid inlet with one of the outlet orifices in the nozzle head for obtaining the desired water distribution therefrom. The bearing spindle is mounted for relative rotation between the bearing spindle and the body member. A ball drive is disposed within the body member. The ball drive is operatively connected to the nozzle head and responsive to fluid flow through the bearing spindle to the nozzle head for rotating the nozzle head.

Abstract: A sprinkler has an orifice through an orifice plate. The periphery of the orifice is preferably not circular; it has at least one corner formed by the intersection of adjacent portions of the periphery. The nozzle plate is preferably domed and mounted concave with respect to the source of the fluid. The orifice may be a number of different shapes including various polygons, tear-shaped or generally circular with notches mounted in the periphery. The orifice may be eccentrically mounted through the dome of the plate.