Patent ID: 9248459
Filing Date: 2016-02-02
CPC Classification: B05B

Claim Text:
1. A sprinkler head nozzle assembly comprising: a nozzle housing including an inlet for pressurized water and an outlet downstream of the inlet; a rotating arc adjustment ring mounted on the housing such that rotation of the arc adjustment ring extends and reduces an arcuate nozzle discharge opening to set an arc of coverage of the sprinkler head nozzle assembly; a rotating range adjustment ring mounted on the housing upstream of the arc adjustment ring such that rotation of the range adjustment ring increases and decreases flow of water to the arcuate nozzle discharge opening; a rotating deflector, mounted on a central shaft extending through the arc adjustment ring, the range adjustment ring and the nozzle housing operable to distribute a flow of water extending through an upstream flow control area and the arcuate nozzle discharge opening outwardly from the nozzle assembly; an upper valve element including an upper conical stepped spiral surface having a predetermined pitch where the stepped surface forms a fixed edge of the arcuate nozzle discharge opening; and a lower valve element positioned under the upper valve element and rotatable with the rotating range adjustment ring, such that rotation of the lower valve element changes the length of the arcuate nozzle discharge opening, the lower valve element including a lower stepped spiral surface with the predetermined pitch where the lower stepped spiral surface forms an adjustable edge of the arcuate nozzle discharge opening such that rotation of the lower valve element adjusts the length of the arcuate nozzle discharge opening to provide an adjustable cone shaped discharge flow of water onto the rotating deflector.