Abstract: A sprinkler. A sprinkler nozzle assembly is coupled to a base for rotating movement. A stationary cam with cam surface engages a cam follower which open and close valves to regulate water flow as selected angles of rotation. In an embodiment, a pop-up sprinkler is provided, and the moving components are part of the riser. A turbine drive mechanism is coupled to an upper housing on which a plurality of sprinkler nozzle assemblies are affixed. The drive mechanism includes water driven impeller and a gear train adapted for operatively driving the upper housing, and associated sprinkler nozzle assemblies.

Abstract: A sprinkler. A stationary base includes a turbine to drive an upper housing. A plurality of sprinkler nozzle assemblies mounted on the upper housing include low voltage solenoids that are energized via slip ring contacts, with a power discontinuous slip ring located on the base. When powered, the solenoids open to allow water to be directed from the nozzle in the sprinkler nozzle assembly. the nozzles are sized, shaped, and directed to apportion water as needed to provide average water quantities amongst parts of irregularly shaped parcels.