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
Apparatus and method to simulate a power trip to a disk drive
Modular utility rack
Over the counter medicinal container with surface ornamentation
Control unit of a ride level control system, and ride level control system
Acoustic reconfiguration devices and methods
Lithographic apparatus and device manufacturing method
Integrated projector system
  Randomly Featured Patents
Low capacitance ESD protection device
Electrode and method of making neuromuscular stimulator
Lithography apparatus, method of forming pattern and method of manufacturing semiconductor device
Magnetic filter material comprising a self-bonding nonwoven fabric of continuous thermoplastic fibers and magnetic particulate within the fibers
Semiconductor memory device and manufacturing method thereof
Optically active phosphine derivative having at least two vinyl groups, polymer produced using the same as monomer, and transition metal complexes of these
Device for adjusting shoulder anchor height
Image shake detecting device
Pressure-sensitive transfer elements
Self-adhesive acrylate copolymers, a process for their preparation and self-adhesive webs, which contain them