The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2002
Filed:
Dec. 15, 1999
Willard A. Cutler, Big Flats, NY (US);
David L. Hickman, Big Flats, NY (US);
Stanley D. Solsky, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A replaceable gravity-flow cyst-reducing water filter cartridge for placement in a water filter carafe, comprising a filter cartridge housing with a cap having a plurality of untreated water inlet ports, wherein the cap is sealingly attached to a top rim of the housing. The filter housing further comprises a gooseneck conduit that is connected to a lower region of the filter housing, with the gooseneck conduit having at one end a treated water outlet port that opens into a side surface of the filter housing. The filter housing also includes a packed bed of ion-exchange resin that is disposed in an upper region of the filter housing and a high surface area cyst-reducing filter element that is disposed in the lower region of the filter housing. The filter element provides at least 99.95% removal of 3-4 &mgr;m particles when tested in accordance with NSF standard 53, Drinking Water Treatment Units—Health Effects (September 1997). A bottom surface of the ion-exchange resin is in full contact with one side of a bottom screen, which is attached at the periphery to the side surface of the housing. The filter housing further has a first chamber separating the packed bed of ion-exchange resin from the cyst-reducing filter element and a second chamber proximate to the bottom surface of the filter housing, which is in fluid communication with the gooseneck conduit. The housing also includes an air vent conduit that is connected to the upper region of the filter housing, wherein the air vent conduit has an entry end that opens into the first chamber and an exit end that opens to the outside of the housing. The exit end is positioned above the treated water outlet port of the gooseneck conduit and the exit end is further covered with a hydrophobic membrane. The packed bed of ion-exchange resin and the cyst-reducing filter element each correspond in shape to the shape of the filter housing.