Liquid purification or separation – Flow – fluid pressure or material level – responsive
Reexamination Certificate
2007-10-10
2010-11-23
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
C210S094000, C210S110000, C210S137000, C210S195200, C210S195300, C210S086000, C210S087000, C210S203000, C210S209000, C210S237000, C210S096200, C210S257200, C210S258000, C210S259000, C210S335000, C210S440000, C210S443000, C210S449000
Reexamination Certificate
active
07837866
ABSTRACT:
A drainless reverse osmosis (RO) water purification system provides relatively pure water for on-demand dispensing, while recycling brine to a domestic hot water system. The drainless purification system includes a pre-filter catalyst cartridge for removing chlorine-based contaminants from a tap water supply upstream from an RO membrane. The catalyst is regularly refreshed by a high through-flow of water to a conventional cold water dispense faucet, thereby significantly prolonging the service life of the RO membrane. The RO membrane is incorporated into a multi-cartridge unit adapted for facilitated slide-out removal and replacement as needed. A control valve recycles brine from the RO membrane to the hot water system during pure water production, and recirculates tap water through the RO membrane when a pure water reservoir is substantially filled. The multi-cartridge unit may further include an air filtration system for providing a flow of filtered air.
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Drodge Joseph W
Kell Lowry & Kelley, LLP
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