Patent ID: 6695223
Filing Date: 2004-02-24
Classification: B05B

Abstract:
A sprinkler, comprising:an outer housing having a lower end connectable to a source of pressurized water; a riser vertically reciprocable along a vertical axis within the outer housing between extended and retracted positions when the source of pressurized water is turned ON and OFF; a nozzle mounted at an upper end of the riser for rotation about the vertical axis; a turbine mounted for rotation at different speeds inside the riser in response to changes in pressure of water flowing past the turbine; a drive mechanism connecting the turbine and the nozzle for rotating the nozzle; and an adjustable stator for changing the pressure of the water flowing past the turbine to vary the speed of rotation of the nozzle, wherein the adjustable stator includes at least one valve member, a spring for biasing the valve member toward an inlet opening at a lower end of the riser, and means for changing a downward biasing force of the spring exerted against the valve member, wherein the stator includes a frame portion connected to the valve member, wherein the means for changing the downward biasing force includes a mandrel mounted to the frame portion for holding one end of the spring, a vertical position of the mandrel within the frame portion being adjustable, and wherein the mandrel and the frame portion are formed with a plurality of mating detents and projections that allow the mandrel to be twisted and moved to one of a plurality of predetermined vertical positions.