Resources Contact Us Home
Valve actuator system

Image Number 3 for United States Patent #6651686.

An actuator system for a system valve exposable to a source of system pressure. A piston within a sensing vessel is caused to move longitudinally from a first position to a second position in response to a designated system pressure. A first piston stem carried by the piston is mechanically coupled to an actuator control valve, which is interposed in a fluid path between an actuator and a source of actuator pressure. Movement of the piston from its first to second position causes the coupled actuator control valve to block the fluid path linking the actuator and its pressure source, thereby causing a predetermined change in pressure at the actuator. As a result, the actuator shifts from its unactuated to its actuated state, thereby causing the system valve to shift from a first system valve position to a second system valve position.

  Recently Added Patents
Tandem electric machine arrangement
Method for manufacturing photoelectric conversion device
Liquid crystal display device and driving method thereof
Binary-to-gray converting circuits and gray code counter including the same
Portable stand for computer
Nitrogen-doped carbon-supported cobalt-iron oxygen reduction catalyst
Pharmaceutical compositions of paclitaxel, paclitaxel analogs or paclitaxel conjugates and related methods of preparation and use
  Randomly Featured Patents
Pen clip
Re-usable coupling for sanitary hoses
Boiling pot overflow prevention apparatus
Device for variable actuation of the gas exchange valves in internal combustion piston engines
Method for agglomerating and passivating used material or fines resulting from the production of organohalosilanes
Automatic background noise estimator for a noise suppression system
Gas diffusion electrodes
Wall mount cabinet system
Roll towel dispenser
Nickel aluminide intermetallic alloys for tooling applications