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
Debris tray
Sealing member for piezoelectric resonator device, and piezoelectric resonator device
Collaborative image capture
Radio communication system, base station apparatus, terminal apparatus, and radio communication method for radio communication system
Encoder that optically detects positional information of a moving body from different optical paths lengths
Power supply device
Feature-based autocorrection
  Randomly Featured Patents
Automotive trim piece and method to form an air bag opening
Compounds having aromatic rings and side-chain amide-functionality and a method for transporting monovalent anions across biological membranes using the same
System and method for associating historical information with sensory data and distribution thereof
Method, computer software code, and system for determining a train direction at a railroad crossing
Variable ratio drive pulley with damping structure
Circuit arrangement in a mobile phone for a digital mobile telephone system
Reverse-turn mimetics and method relating thereto
Coding circuit for recording data on DVD disk
Detachable planing enhancement system for inflatable sportboats
Cylinder color printing method and product using improved misregistration detection