Resources Contact Us Home
Sprinkler with geared viscous hesitator and related method

Image Number 6 for United States Patent #7980488.

A rotary sprinkler includes: a shaft having a cam, the cam having a plurality of radially outwardly projecting cam lobes; a rotatable water distribution plate adapted to be impinged upon by a stream emitted from a nozzle causing at least the water distribution plate to rotate; a hesitator assembly including a stationary housing having a sealed chamber at least partially filled with a viscous fluid, with at least the cam and the cam lobes located within the chamber; a rotor ring located within the chamber in substantially surrounding relationship to the cam, the rotor ring loosely located within the chamber for rotation and translation, the rotor ring provided with at least two hesitator lobes projecting radially inwardly and movable laterally into and out of a path of rotation of the cam lobes, and a first plurality of radially outwardly projecting teeth selectively engageable with a second greater plurality of teeth provided on an inner wall of the housing; and wherein rotation of water distribution plate is slowed during intervals when one of the cam lobes engages and pushes past a respective one of the hesitator lobes, the cam lobe exerting both rotation and translation forces on the rotor ring, with one of the first plurality of teeth on the rotor engaging one of the second plurality of teeth on the housing wall.

  Recently Added Patents
Methods for isolating ligands of the human bitter taste receptor TAS2R49
Signal apparatus for facilitating safe backup of vehicles
Fluid discrimination device
Camera with monitor
Method for forming contact in an integrated circuit
Wind energy system having a connection protection device
Haworthia plant named `CAPETOWN`
  Randomly Featured Patents
Maltol recovery
Objective actuator
Method for manufacturing an orifice plate for use of a liquid discharge, an orifice plate, a liquid discharge provided with such orifice plate, and a method for manufacturing such liquid disch
Patron and croupier assessment in roulette
Modular entertainment system with movable electronic components
Fire detector
Fuel cell separator and method for manufacturing the same
Financial transaction approval system and method
Lock-up clutch slip control device