Dale Ira Hauk

US Patent:

42448204, Jan 13, 1981

Filed:

May 16, 1978

Appl. No.:

5/906499

Inventors:

Dale I. Hauk - Pinckney MI
Gerald B. Tanny - Ann Arbor MI

Assignee:

Gelman Instrument Company - Ann Arbor MI

International Classification:

B01D 3100

US Classification:

210194

Abstract:

A fluid purification system for performing filtration of particles from a feed liquid by a tangential flow of the feed liquid over a membrane surface. In one embodiment, the purification system includes a filter cartridge contained within a filter housing having ports permitting ingress and egress of feed liquid and filtrate. The cartridge includes a filter element having a layered construction with a thin flow channel between the layers. One layer of the filter element is formed of a sheet of impervious material defining one wall of the thin flow channel. Another layer of the filter element is spaced from the one layer and formed of a sheet of permeable membrane material and defines another wall of the thin flow channel. The spacing between the walls of the thin flow channel is maintained by a sheet of reticular material that provides turbulence in the thin flow channel to promote cross flow filtration. The filter element is formed into a pleated, cylindrical shape with a flow axis parallel to the pleats.

US Patent:

42060559, Jun 3, 1980

Filed:

Dec 4, 1978

Appl. No.:

5/966535

Inventors:

Dale I. Hauk - Pinckney MI
Gerald Tanny - Ann Arbor MI
William G. Presswood - Ypsilanti MI

Assignee:

Gelman Instrument Company - Ann Arbor MI

International Classification:

B01D 2506
B01D 3522

US Classification:

210315

Abstract:

The invention provides a water filter, particularly suited for household use, with valving which enables either a bypass mode or a filtering mode. During the filtering mode the water flows through a number of filtering layers one of which is a microporous membrane and during the bypass mode the water flows parallel to and against the membrane so as to cleanse the membrane of material accumulated thereon during the filtering mode.