Frank H Devine

US Patent:

D3142264, Jan 29, 1991

Filed:

Sep 25, 1989

Appl. No.:

7/411597

Inventors:

Frank M. Devine - Los Angeles CA
Rod D. Shapiro - Los Angeles CA

US Classification:

D23209

US Patent:

49784498, Dec 18, 1990

Filed:

Feb 12, 1990

Appl. No.:

7/478542

Inventors:

Frank M. Devine - Los Angeles CA
Rod D. Shapiro - Los Angeles CA

International Classification:

B01D 1500

US Classification:

210264

Abstract:

A home water purifier is described, which includes a column of beads of ion exchange material and a column of grains of activated charcoal, which is of low cost construction. The filter includes a housing (26, FIG. 2) with a vertically-extending chamber having an air outlet at the top, a water inlet (46) at the middle, and a water outlet at the bottom. A mass (60) of activated charcoal grains lies in the lower portion of the chamber to remove impurities, and a mass (56) of ion exchange beads lies above the charcoal but below the water inlet to remove heavy metals. An air passage (64) formed along the upper portion of the chamber holds a retainer (66) of open cell foam material that prevents loss of the filtering material if the filter is turned upside-down during transport. The space (70) between the bottom of the retainer and the top of the ion exchange beads is less than the mass of the ion exchange beads, so if the water filter is turned over during transport, the charcoal grains and ion exchange beads will not mix. The housing of the filter forms a downwardly-facing ledge (71) at the top of the ion exchange material, to further avoid mixing during transport.