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
Transistor and display device
Processes for producing polyunsaturated fatty acids in transgenic organisms
Downhole telemetry system
Use of Lactobacillus for liver protection
Focusing apparatus that effectively sets a focus area of an image when a focusing mode is changed
Semiconductor device including multi-chip
Method for distributing advertisements to client devices using an obscured ad monitoring function
  Randomly Featured Patents
Pump device for a container
Operational trans-conductance amplifier with output clamp circuit
Reduction of leakage current in InGaAs diodes
Aircraft lamp
Class of pure piezoelectric materials
LOC semiconductor assembled with room temperature adhesive
Disposable cat litter box liner
Nailing machine with a safety mechanism
Amino derivatives of tetrasubstituted benzene compounds
Daunomycin derivatives, their aglycones and the use thereof