Patent ID: 8028932
Filing Date: 2011-10-04
Classification: B05B

Abstract:
1. A rotary, nutating sprinkler head comprising: a housing supporting a nozzle; a tube axially adjacent said nozzle and extending in a downstream direction, concentric with a vertical center axis of the sprinkler head; a spool having a hub and upper and lower flanges, said spool loosely supported on said tube, said spool carrying a water-deflection plate formed with one or more grooves shaped to cause said spool and said water-deflection plate to rotate when said water-deflection plate is impinged upon by a stream emitted from said nozzle, said upper flange having an underside formed with a radially outer concave lip, and said lower flange having a topside formed with a first annular array of teeth facing said upper flange; an annular race supported in said housing, having a radially inner surface defining a center opening; an upper surface having a substantially smooth, radially inner surface portion engageable with said radially outer concave lip of said upper flange, and a lower surface having a surface portion formed with a second annular array of teeth engageable with said first annular array of teeth as said spool rotates and wobbles about said center axis.