Patent ID: 8282022

Claim:
A sprinkler, comprising: a nozzle plate having at least one orifice formed therein; and a steam deflector rotatably mounted adjacent the nozzle plate and having a plurality of flutes formed therein in a side thereof facing the nozzle plate, the side of the stream deflector having the flutes being formed with a generally smooth surface that extends between the flutes with a first angular dimension larger than a largest second angular dimension between adjacent flutes, wherein each single flute having an inner portion that momentarily aligns with water flowing through the orifice in the nozzle plate during rotation of the stream deflector relative to the nozzle plate wherein water flowing through the orifice will be channeled in a radial direction by each single flute thereby forming a stream of water that is ejected from the stream deflector and further wherein the flutes extend at progressively increasing angles wherein a combination of streams of water successively ejected from the stream deflector establish a predetermined shape of coverage having a size determined by the first angular dimension of the smooth surface that extends between the flutes.