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
Methods and apparatus for deactivating internal constraint curves when inflating an N-sided patch
Gateway channel utilization
Nucleic acid sequences encoding secE/sec61-gamma subunits of protein translocation complexes
Image erasing apparatus and recording medium conveying method for image erasing apparatus
Curable sublimation marking material and sublimation transfer process using same
Gyroscope utilizing torsional springs and optical sensing
  Randomly Featured Patents
Phosphating process of metal surface
Hybrid electric propulsion system
Method and apparatus for carrier synchronization acquisition in a digital burst mode communication system
Digitizing stylus
Pharmaceutical compositions for inhibiting absorption of cholesterol
System and method for communicating messages between a host computer and a designated device
Storage device performance alignment notification
Method for skipping multimedia file and multimedia apparatus thereof
Suturing method
Manipulation of nervous systems by electric fields