US Patent 12005464 Sprinkler with radially limited nutating spool assembly

A sprinkler head having a spool assembly positioned within the lower sprinkler body of the sprinkler head. The spool assembly has a spool body having a distribution disc at an upper end of the spool body. The sprinkler head is configured with a nozzle that sprays fluid onto the distribution disk, causing the spool assembly to nutate within the lower sprinkler body when sprinkler head is running. The spool assembly is configured with two friction bands that are each configured to radially roll in or on a respective race within the lower sprinkler body. The friction bands can be integrally formed with the spool assembly or removably positioned on the spool assembly.