Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2007-10-29
2009-11-24
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C122S013300, C237S056000
Reexamination Certificate
active
07621295
ABSTRACT:
A fluid isolation valve having a valve body with a first fluid flow port, a second fluid flow port and a fluid drain port with a valve in the fluid drain port. The valve body also defines a fluid flow channel, a drain flow channel and a valve portion, wherein the valve portion is disposed in the valve body to be communicated with the first fluid flow port, the second fluid flow port and the fluid drain port. A flow diversion device is also provided and is disposed within the valve portion. The flow diversion device is configurable between a first configuration and a second configuration, such that when the flow diversion device is in the first configuration the first fluid flow port is communicated with the second fluid flow port. Consequently, when the flow diversion device is in the second configuration the first fluid flow port is communicated with the fluid drain port. The fluid flow can be decrease or stop by use of the valve within the fluid drain port.
REFERENCES:
patent: 3234958 (1966-02-01), Butters
patent: 3627203 (1971-12-01), Martin
patent: 5538033 (1996-07-01), Condon
patent: 7156425 (2007-01-01), Atkinson
Rinnai, “How to use your new continuous flow water heater”, p. 24, Mar. 2003.
Fox John
Michaelis Brian L.
Seyfarth Shaw LLP
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