Patent ID: 7726587

Claim:
A nozzle for an irrigation sprinkler comprising: a side wall having opposite ends, an outlet wall on one end of the side wall and defining a fluid outlet with a first cross-sectional area, an inlet wall on the other end of the side wall and defining a fluid inlet to the nozzle with a second cross-sectional area, and a central longitudinal axis extending through the inlet wall and the outlet wall; a pressure regulating chamber extending substantially symmetrically around the nozzle central longitudinal axis and defined by the side wall, the outlet wall and the inlet wall; the pressure regulating chamber positioned in the nozzle between the fluid inlet and the fluid outlet to collect a volume of the entire fluid stream in the nozzle pressure regulating chamber without any fluid bypassing the pressure regulating chamber; and the volume of the pressure regulating chamber defined by a dimension along the central longitudinal axis at least equal to a dimension transverse to the longitudinal axis to collect a sufficient amount of fluid to sufficiently equalize pressure variations of the fluid entering the nozzle so that a fluid stream being sprayed from the pressure regulating chamber through the fluid outlet is projected from the nozzle with a generally consistent throw distance and within about 2 feet from a target distance and with a distribution uniformity of about 80 percent or greater and a scheduling coefficient of about 1.3 or less regardless of the fluid pressure upstream of the inlet wall within a range between about 40 to about 100 psi.