Bottle filter cap

  • US 5,609,759 A
  • Filed: 06/02/1995
  • Issued: 03/11/1997
  • Est. Priority Date: 06/02/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A filter assembly for use with a bottle having a circular cross-section neck or open end to simultaneously cap the neck or open end and filter liquid poured out of the bottle through the neck or open end, comprising:

  • a tube of filtering material, having a substantially continuous liquid-porous side wall a hollow interior, a first closed end, and a second open end;

    a cap for a bottle neck or end, having a fitting portion thereof for cooperating with a bottle neck or end and closing a neck or end, said cap having first and second substantially opposite surfaces;

    a manual valve operatively associated with said cap, in fluid communication with said tube of filtering material and manually movable between a position defining means for allowing liquid flow through said tube and a position defining means not allowing liquid flow through said tube; and

    said tube operatively connected to said cap second surface at said tube second open end, andwherein said filtering material comprises a substantially continuous self-supporting, self-venting body of activated carbon and binder having a porosity of about 10-120 microns.

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