Resources Contact Us Home
Automatic water supply shutoff valve

Image Number 5 for United States Patent #6357467.

An automatic water supply shutoff valve for use with a fire protection piping system has a body defining a cavity communicating among a supply inlet connected to a water supply, an ancillary outlet connected to ancillary piping, and a fire protection outlet connected to fire protection piping; and a piston within the cavity defining a piston passageway. The piston moves between a first position connecting the supply inlet and ancillary outlet and a second position connecting the supply inlet and fire protection outlet. The piston moves in response to biasing forces acting against the piston, including a first biasing force from the supply inlet, a second biasing force from the fire protection outlet, and a third biasing force. The first biasing force, urging the piston toward its second or fire protection position, is opposed by a combination of the second and third biasing forces, together urging the piston toward its first or ancillary position. The piston has an inlet communicating between the supply inlet and piston passageway, and a plurality of radial piston outlets, which, in first position, communicate between the piston passageway and ancillary outlet, and which, in second position, communicate between the piston passageway and fire protection outlet.

  Recently Added Patents
Defensin polynucleotides and methods of use
Method for encoding signal, and method for decoding signal
Monitoring cloud-runtime operations
Processor engine, integrated circuit and method therefor
Expressive grouping for language integrated queries
Fluid conduit with PTC fabric heating
Monitoring device, monitoring method and non-transitory computer readable medium
  Randomly Featured Patents
Air compressor control
Adjustable open-wrench with a sliding side jaw having a releasable adjustment mechanism to allow ratcheting operation
Preparation of oxidized polyolefin waxes
Epicardial clip
Apparatus for clamping workpieces which have to be machined by a machine tool
Layout method and structure for driving chip of an LCD having first and second pin groups only along a horizontal direction of the LCD and first and second wiring groups for the respective pin
Telephone set, communication adaptor, home appliance control method, and program recording medium
Dispensing gun for ratio sensitive two-part material
Centrifuge rotor having a resilient trunnion
Radio resource control