Patent ID: 6899287

Claim:
A rotary sprinkler comprising: a sprinkler body having a center axis; a nozzle attached to said sprinkler body for outputting a stream of water therefrom along said center axis; a rotor having two end portions and being rotatably attached to said sprinkler body; a rotatable water deflector rotatably attached to said rotor with a viscous fluid coupling on one end thereof and being positioned in said steam of water exiting said nozzle, said water deflector having a surface shaped to deflect water impinging thereupon from said nozzle to rotate said water deflector; a water diffuser attached to said rotor for rotation therewith and positioned to intermittently intersect said stream of water deflected by said water deflector; and a viscous fluid brake formed on the other end portion of said rotor with viscous fluid located between a part of said rotor and said sprinkler body for retarding the rotational speed of said rotor having said diffuser and water deflector rotatably attached thereto; whereby a rotary sprinkler deflects water with a rotary water deflector into a rotating water diffuser.