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Water purification and sterilization system

  • US 4,615,799 A
  • Filed: 05/01/1985
  • Issued: 10/07/1986
  • Est. Priority Date: 05/01/1985
  • Status: Expired due to Fees
First Claim
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1. In combination with a pressurized water system, a water purifier comprising:

  • a filter canister comprising a filter inlet, and containing a replaceable filter element, in which water under pressure can be received, through said filter inlet, filtered through said filter element and expelled;

    an ultraviolet irradiation chamber for receiving water expelled from said canister;

    conduit means for fluidly connecting said filter canister and ultraviolet irradiation chamber, said received water being exposed to a level of ultraviolet radiation sufficient to kill essentially all living organisms within said water prior to said water being expelled from said chamber;

    said ultraviolet irradiation chamber of a generally annular shape, consisting of;

    an outer cylindrical wall;

    an inner cylindrical wall concentric to said outer cylindrical wall, said inner wall being transparent to ultraviolet radiation;

    a tubular source of ultraviolet radiation mounted concentrically with respect to said outer and inner cylindrical walls;

    water inlet near one end of said annular chamber;

    a water outlet near the other end of said annular chamber; and

    means for sealing the ends of said annular chamber consisting of;

    a circular end cap concentrically and sealingly bonded at each end of said outer cylindrical wall, each end cap having a hole in its center, and each end cap being mounted orthogonally with respect to the cylindrical axes of said inner and outer cylindrical walls;

    an exteriorly-threaded mounting nipple having an interior diameter equal to the hole in the center of each end cap, each nipple sealingly bonded to its respective end cap and projecting longitudinally outward from its respective chamber end, said inner cylindrical wall being slideably installed through both nipples such that the ends of said inner wall extend outwardly from said nipples;

    an O-ring installed circumferentially around the gap between said inner cylindrical wall and said mounting nipple at each end of said chamber; and

    a nut installed on each nipple, which, when tightened, compress their respective O-rings, forcing said O-rings deeper into said repective gaps, creating a water-tight seal at each end of the chamber between the outer surface of said inner cylindrical wall and the interior cylindrical surface of the respective nipple; and

    means for stopping the flow of water through said water outlet line when ultraviolet radiation is not present in said irradiation chamber, said means for stopping comprising a normally-closed solenoid-actuated valve interposed within said water outlet line, a single-pole relay having a coil connected in series with the tubular source, said solenoid-actuated valve receiving current for opening said water outlet line when current is flowing through said tubular source.

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