Arc adjustable rotary sprinkler having full-circle operation and automatic matched precipitation

摘要

A rotary sprinkler including a rotatable nozzle turret with automatic matched precipitation to an arc of rotation, a nozzle purge feature, and/or a flow shut off valve coupled to a variable flow nozzle outlet.

主权项

1. A rotary sprinkler comprising:
a housing with an inlet for receiving fluid for irrigation, the housing having a longitudinal axis; a nozzle defining an outlet with a variable shape for projecting irrigation fluid from the sprinkler, the nozzle mounted for rotation relative to the housing; a drive mechanism for rotating the nozzle in a reversible arc of rotation; an arc adjustment mechanism configured upon adjustment thereof to increase or decrease the arc of rotation of the nozzle; and a split gate valve at the nozzle outlet having two gate vanes disposed on opposing sides of the nozzle outlet, the gate vanes operably coupled to the arc adjustment mechanism such that adjustment thereof is operable to shift the two gate vanes toward or away from each other at the nozzle outlet to vary the shape of the nozzle outlet to adjust a fluid flow rate through the outlet proportional to the arc of rotation, wherein the split gate valve includes a linking portion connecting ends of the two gate valve vanes, and wherein the linking portion is a resilient strip providing a biasing force on each of the two gate vanes.