Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Alkaline battery
ESD protection device and method for producing the same
Uplink synchronization management in wireless networks
Vibration disturbance estimation and control
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
Electronic system with vertical intermetallic compound
Vacuum cleaner
  Randomly Featured Patents
Optical system for a digital light projection system including 3-channel and 4-channel LED array light engines
Method and apparatus for enhanced ion spectra generation and detection in ion mobility spectrometry
Method and apparatus for monitoring a physical or chemical conversion of a grain material
Covering for flower pot and floral grouping
Rotary gad for ground drill
Resist solution for photolithography including a base resin and an oxygen-free or low-oxygen solvent
Combined ice scraper and brush
Intermittent high-drag oil well drilling methods and apparatus
Zoom lens
Gasket for radially spaced pipes