Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Four-port valve and three-way valve










Image Number 13 for United States Patent #5996606.

A four-port changeover valve in an emergency water storage tank facility for changing over the flow paths of the water main and to the tank by axially moving the valve rod. Three valve seats are formed axially in a valve box. The valve rod extends through the valve seats. As the four-port changeover valve, the three valve seats can be selectively opened and closed by one and the other of two valve bodies. The water storage tank is connected to a first and a fourth chamber, while the water main is connected to a second and a third chamber. The valve rod is raised and lowered by the cylinder. In a normal state when the water pressure in the water main is at a required level, the valve rod rises so that the tank and the water main communicate with each other. In an emergency when the water pressure is low, the valve rod is pushed down by a spring, so that the one valve body is pressed against the first valve seat, while the other valve body separates from the second valve body and is seated on the third valve body. The tank is thus shut off from the water main. Also, a three-way valve for operating the changeover valve is proposed which eliminates an unstable state in which the flow direction cannot be changed over.








 
 
  Recently Added Patents
Adapter
Multi-user remote health monitoring system with biometrics support
Method of motion correction in optical coherence tomography imaging
Portable electronic device housing including hinge
System and method for receiving MBMS broadcasting service
Termite tubing preventative for non-wood materials
Method and a system for registering a 3D pre-acquired image coordinates system with a medical positioning system coordinate system and with a 2D image coordinate system
  Randomly Featured Patents
Module for a modular beverage distribution system
Communication terminal device and communication method
Reinforcement in a honeycomb foundation
Calculating a parameter indicative of an error factor of a circuit
Massaging mechanism of massaging machine
Computer display accessory
Dual conversion gain gate and capacitor combination
Instrument for closing trocar puncture wounds
Method and ATM communication network for integration of an ATM switching node to be configured into an ATM communication network
Flow meter