Resources Contact Us Home
Pilot operated valves

Image Number 5 for United States Patent #4850345.

There is disclosed a pilot operated valve which includes a valve body, a main valve having a main valve member controlling fluid communication between an inlet port and an outlet port, a pilot valve including a vent passage sensing downstream pressure to open and close the main valve member as the sensed pressure is above or below a predetermined pressure, and selectively operable override means to suspend pilot operation of the valve. The override means may be means to occlude the vent passage and thus close the main valve, means to open the vent passage to atmosphere and thus open the main valve, or means to bypass the main valve.

  Recently Added Patents
Light emitting device
Center spreader adapter tool for toilet paper rolls and paper towel rolls that do not have inner cardboard tubes
Hybrid asynchronous transmission process
Image forming apparatus and control method therefor
Bisphosphonate compounds
Per-request control of DNS behavior
Method and apparatus for image sensor packaging
  Randomly Featured Patents
Video signal data and composite synchronization extraction circuit for on-screen display
Communication system and method using a relay node
Shutter assembly
Film formation apparatus and film formation method
Composition for the treatment and prevention of endothelial dysfunction
Alignment stage device
Implantable device and method for adjustably restricting a body lumen
Method and apparatus for a contact start plasma cutting process
Fuel pump
FFT based digital radiometer