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Portable water purification system with double piston pump

  • US 5,496,466 A
  • Filed: 09/14/1993
  • Issued: 03/05/1996
  • Est. Priority Date: 09/14/1993
  • Status: Expired due to Term
First Claim
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1. A water purification system, comprising:

  • a reverse osmosis filter having a feed water input, a concentrate output and a permeate output; and

    a pump system comprising;

    (A) a feed water pumping section for inputting feed water to said feed water input, said feed water pumping section including a feed water cylinder, a feed water piston disposed to move axially in said feed water cylinder, a feed water intake means for connecting a feed water source to said feed water cylinder, and feed water inputting means connecting said feed water cylinder to said feed water input;

    (B) a concentrate pumping section for removing concentrate from said concentrate output, said concentrate pumping section including a concentrate cylinder, a concentrate piston axially disposed in said concentrate cylinder, and a concentrate intake means connecting said concentrate cylinder to said concentrate output; and

    (C) means for connecting said feed water inputting means with said feed water input without communicating with said concentrate pumping section, said filter and said pump system being constructed and arranged such that said feed water piston is caused to move in an axial direction by a control that causes said concentrate piston to move in an opposite axial direction.

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