Patent ID: 6921030

Claim:
A device for controlling nozzle rotation in a sprinkler comprising: a nozzle driving assembly in rotary driving connection with a sprinkler nozzle according to fluid flow from a fluid source through said nozzle driving assembly to said sprinkler nozzle; said nozzle driving assembly having a stator member, a turbine wheel, and a valve disc member, said valve disc member being disposed between said stator member and said turbine wheel; said turbine wheel including a plurality of vanes disposed on an external circumference of said turbine wheel, said vanes positioned to receive fluid flow and thereby exert a force for inducing rotational movement to said turbine wheel; and, said turbine wheel further including at least one spoke extending from a hub to a circumference of said turbine wheel; said spoke being configured to receive fluid flow so as to counteract at least a portion of said force and thereby limit a speed of rotational movement of said turbine wheel.