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

Image Number 4 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
Image forming apparatus, control method of image forming apparatus, and storage medium
Method and system for expanding axial coverage in iterative reconstruction in computer tomography (CT)
Method and apparatus for reducing and controlling highway congestion to save on fuel costs
Motor drive component verification system and method
Systems and methods for providing live voicemail to a mobile handset
Memory controller including a hardware compression and decompression engine for managing system memory and graphical operations
Electronic communication device
  Randomly Featured Patents
Method and circuit for limiting the power of a signal compiled from spread-coded signals
Perylene-based semiconducting materials
Software delivery manager
External seal unit for tube hydroforming
Lighting installation
Simultaneous localization and RF modeling
Pipe cleaning machine for driving spiral wire rods
Apparatus and method for scheduling data in a modem
DC-DC converter
Polymer blends for use in photoelectrochemical cells for conversion of solar energy to electricity