Patent ID: 9415406
Filing Date: 2016-08-16
CPC Classification: B05B

Claim Text:
1. A sprinkler, comprising: a riser for receiving a pressurized fluid; a nozzle; a mounting device configured to mount the nozzle at an upper end of the riser for rotation about an axis; a turbine mounted for rotation inside the riser and in fluid communication with the pressurized fluid; a drive device connected between the turbine and the nozzle such that rotation of the turbine by the pressurized fluid will rotate the nozzle; a first valve positioned upstream from the turbine and configured to selectively re-direct at least a portion of the pressurized fluid around the turbine when the pressurized fluid is air or a mixture of water and air the first valve including: a second valve positioned upstream from the first valve and configured to maintain a desired pressure differential across the turbine.