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
Methods of forming activated carbons
Computer system for routing package deliveries
Measurement and uses of oxidative status
Antenna device
Process for preparing soybean curd using micronized solution of soybean curd
Binder for secondary battery providing excellent adhesion strength and cycle property
Power collecting device, power measuring device, and power collecting method
  Randomly Featured Patents
Synthesis of 1,2,3,4-tetrahydroxybenzenes and 1,2,3-trihydroxybenzenes using myo-inositol-1-phosphate synthase and myo-inositol 2-dehydrogenase
Shaving aid
Preparation of permanent color inks from water-soluble colorants using specific phosphonium salts
Multiwavelength cascaded raman resonator
Spindle mount for rotary abrasive tools or the like
Method and apparatus for CAM with redundancy
Method for installing integral shroud turbine blading
Method for obtaining low densities with particulate expandable polystyrene
Lever operating device for a switch
Fluid/electrical rotary joint