Patent ID: 7748646

Claim:
A sprinkler, comprising: a gear drive mounted inside a gear box and including an upper input stage and a lower output stage; an inverted frusto-conical rotary distributor head coupled to the output stage of the gear drive, the rotary distributor head having a plurality of circumferentially spaced radially extending recesses; a turbine located between the rotary distributor head and the gear drive and coupled to the input stage of the gear drive; a housing that defines a flow path between the gear box and the housing, the flow path leading to the turbine; a nozzle base that supports the gear box and includes a threaded segment that can be screwed to an upper threaded segment of a riser; and a nozzle plate supported by the nozzle base adjacent the rotary distributor head and configured to direct water into the recesses so that the recesses can simultaneously eject a plurality of outwardly directed streams of water.