Fluid handling – Systems – Multiple inlet with single outlet
Reexamination Certificate
2008-05-06
2008-05-06
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Systems
Multiple inlet with single outlet
C137S543210, C137S895000
Reexamination Certificate
active
07367361
ABSTRACT:
An eductor assembly includes an inlet connectable to a high pressure water source useful in firefighting, an outlet connectable to a fire hose and/or nozzle, and a venturi therebetween. An additive inlet communicates with the venturi so that a chemical additive, such as a foam concentrate, is educed into the output stream. A check valve is positioned at the additive inlet to open under venturi flow conditions and remain closed otherwise. An actuator is provided that holds the check valve in its open position while water flows through the eductor assembly under non-venturi conditions to produce a back flow through the additive inlet and ultimately through the additive fluid circuit, including the additive metering valve components. A return element may be disposed within the eductor body to return the check valve to its closed position when the back flow ceases.
REFERENCES:
patent: 2953160 (1960-09-01), Brazier
patent: 3154101 (1964-10-01), Cravits
patent: 3181563 (1965-05-01), Giffen
patent: 3457949 (1969-07-01), Coulter
patent: 3810787 (1974-05-01), Yoeli et al.
patent: 4645009 (1987-02-01), Hawelka et al.
patent: 5301718 (1994-04-01), Bolhofner
patent: 5794657 (1998-08-01), Oberg
patent: 5960887 (1999-10-01), Crabtree
patent: 6102308 (2000-08-01), Steingass et al.
patent: 6382247 (2002-05-01), Gundry
patent: 6601603 (2003-08-01), Griffin
patent: 6634376 (2003-10-01), Haas
patent: 6725940 (2004-04-01), Klein et al.
Hepperle Stephen M.
Maginot Moore & Beck
Task Force Tips Inc.
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