Robert R Marsh

US Patent:

45029539, Mar 5, 1985

Filed:

Sep 2, 1983

Appl. No.:

6/529134

Inventors:

Robert E. Marsh - Racine WI
Michael H. Colburn - Brookfield WI

Assignee:

Plasworld, Inc. - Racine WI

International Classification:

C02B 182

US Classification:

210 94

Abstract:

Water purifying apparatus comprises a purified water storage vessel and a filter, preferably a reverse osmosis filter, for purifying water. An inlet side of the filter is adapted for connecting to a pressurized source of water to be treated and an outlet side of the filter is connected to an inlet of the storage vessel. A purified discharge line is also connected to the vessel inlet. The vessel is configured for being pressurized by a gas, such as air, in a manner that the pressurizing gas is in direct contact with purified water in the tank. A gas check valve is installed at the vessel combination inlet and outlet, the check valve comprising a spherical valve which floats in water and a valve seat against which the valve seals when most of the water has been withdrawn from the vessel, so as to prevent escape of pressurizing gas from the vessel. At least part of the check valve is made of transparent material so that verical floating movement of the valve can be observed as the vessel is filled from the filtering means, the rate of upward movement of the valve being indicative of filter condition.