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| Number | Title | Issue Date |
| 4238333 | Waste water-oil separator Industrial waste water, containing oil, sand and other debris, flows into the separator via a sewer line. In a first phase of operation, solids are separated by mechanical filter means, such as a bar screen, and the water is separated by permitting the oi... | 12/09/1980 |
| 4224156 | Weir skimmer An apparatus for controlling the liquid level of overflow ponds and the like. It comprises a vertical standpipe having a polymer feed inlet near its bottom, a valve for controlling flow of polymer to the polymer feed inlet, at least 1 fluid discharge inle... | 09/23/1980 |
| 4151087 | Oily-water separator An oily-water separator comprises a single vessel having a partition wall dividing the interior of the vessel into an upper and a lower chamber, a filter device disposed coaxially within the vessel and extending into the both chamber, an oil-water mixture... | 04/24/1979 |
| 4132646 | Separating device A device for separating a first liquid from a second liquid contaminated by the first liquid comprises a casing having an inlet and an outlet in the upper region of the casing, the separated first liquid collecting in the lower portion of the casing, a fl... | 01/02/1979 |
| 4053405 | Warning device and method for fuel filtering systems A fuel filtering system comprises a case having a cartridge-type filter disposed therein, along with a separator which defines a reservoir. Fuel, such as diesel fuel, is adapted to normally enter an inlet to the case, flow through the filter and thence to... | 10/11/1977 |
| 4046161 | Non-return valve for preventing back flow of waste waters A non-return valve comprising: a pipe for waste waters having a passageway for draining the waters in a downstream direction, a circular seat having a given diameter transversely disposed in said pipe and a housing opening into the passageway directly dow... | 09/06/1977 |
| 4032444 | Gravitational separator for mixtures of immiscible liquids of different densities An improved gravitational separator for mixtures of immiscible liquids of different densities, particularly oil and water, includes a reaction member in the form of a dome or diaphragm immersed in more dense liquid to be separated and which floats upwardl... | 06/28/1977 |
| 4014792 | Air and light impervious water purification and product dispensing system A closed system of cyclically storing and dispensing nearly pure water discharged from a reverse osmosis module which is free from exposure to light and air.... | 03/29/1977 |
| 4007120 | Oxidation and ozonation chamber An ozone and oxidation chamber for treating a liquid has a housing provided with an influent line and an effluent line spaced from one another for creating a flow of a liquid through the housing. At least one rotatable axle provided with an agitating blad... | 02/08/1977 |
| 3972811 | Waste converter system and method A human conveyance having a toilet and a fuel burning engine is provided with an arrangement for converting waste from the toilet to a combustible gas and for feeding the gas to the engine where it is burned as a fuel additive to increase the gas mileage ... | 08/03/1976 |
| 3957638 | Apparatuses for the separation of a lighter liquid from a mixture of a heavier and a lighter liquid A counterbalance and control system for a gravitational oil and water separator using a floating inverted bell comprises a linkage, sealed coupling shaft and weight system for controlling an outlet valve for the separated oil accumulated beneath the bell ... | 05/18/1976 |
| 3931009 | Water purification apparatus and timing device for initiating a backwashing cycle A water purification apparatus is disclosed having an aeration chamber for aerating unpurified water from a source. A filter chamber is provided beneath the aeration chamber containing granular media for filtering the aerated water and having spaced apart... | 01/06/1976 |
