Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Reexamination Certificate
2003-09-04
2009-10-27
Cecil, Terry K (Department: 1797)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
C210S190000, C210S269000
Reexamination Certificate
active
07608183
ABSTRACT:
A control valve assembly (10) controls the flow of water to and from a treatment tank (16) and the regeneration of the treatment material therein. A housing of the valve assembly includes connections for a tank inlet and tank outlet, a inlet chamber (60), outlet chamber (34), a pressure-operated inlet valve (24) and an outlet valve (32). A pair of venturi chambers (81a, 81b) are configured to provide co-current and counter-current regeneration. A regeneration control subsystem includes a turbine (104) and a nozzle impinging thereon to produce rotation. An external port (130) receives fluid to provide a driving for the turbine in order to initiate regeneration. A bypass chamber (60) communicates with the inlet chamber (15). The inlet valve (24) has dual seating surfaces for controlling the communication between the inlet chamber, transfer chamber (70) and tank inlet (26).
REFERENCES:
patent: 3891552 (1975-06-01), Prior et al.
patent: 4298025 (1981-11-01), Prior et al.
patent: 4889623 (1989-12-01), Prior et al.
patent: 5022994 (1991-06-01), Avery et al.
patent: 5256283 (1993-10-01), Buettner
patent: 6214214 (2001-04-01), Hansen et al.
patent: 6444127 (2002-09-01), Vaughan et al.
International Search Report PCT/US2003/027827, published Mar. 18, 2004.
Cecil Terry K
Kinetico Incorporated
Tarolli, Sundheim Covell & Tummino LLP
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