Patent ID: 7232081

Claim:
An adjustable arc spray nozzle assembly comprising: a housing having an inlet opening for attachment to a source of pressurized water and an outlet opening for dispensing a stream of water; and a flow control element including a spray arc angle setting member that cooperates with the outlet opening, and is rotationally and axially movable to define an arcuate dispensing orifice of adjustable arcuate extent about the axis of the housing, the axial movement of the arc angle setting member being controlled relative to the rotational movement thereof by a cam follower on a portion of the flow control element positioned within the housing which engages with a cam track, such that rotational movement of the arc angle setting member automatically results in movement of the flow control element to provide proportional variation of the flow of water out of the outlet to maintain a substantially constant precipitation rate independent of arc of coverage; and the flow control element being restrained against axial movement in the downstream direction due to the force of water flowing through the housing by a radially extending lip that engages in a snap-fit relationship with a complementary shoulder extending radially inside the housing.