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
Light emitting device and electronic device
Real-time RSL monitoring in a web-based application
Vehicle drive control system
Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer
Semiconductor memory device
Generating a network map
  Randomly Featured Patents
Peak flow meter
Method of playing a casino card game
Salvia plant named `Mes Ros`
Molecular diversity screening method
Low noise level shifting circuits and methods and systems using the same
Optical head
Optical small form factor transceiver
Electronic device with microphone array capable of suppressing noise
Infant sleeper
Multidentate aza ligands able to complex metal ions and the use thereof in diagnostics and therapy