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 processing device, image processing method, and program
Biaxially oriented film which could be thermally laminated with paper and other substrates
Enhancement of semiconducting photovoltaic absorbers by the addition of alkali salts through solution coating techniques
High-order harmonic device of cavity filter
Gyroscope utilizing torsional springs and optical sensing
Flash multi-level threshold distribution scheme
Use of endogenous promoters in genetic engineering of Nannochloropsis gaditana
  Randomly Featured Patents
Method and system for automatically setting an operational mode of a computer device based on received or detected environmental information
Liquid distributor and method for operating the same
Process to regulate olefin production by catalyst system inhibition
Collapsible nursery stand
Active matrix-type display panel
Tristate electrochromic device
Low gloss polyester coating powder compositions
Desulfurizer comprising activated carbon and method of desulfurization
System and method for protecting micro-structure of display array using spacers in gap within display device
Communication device