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| Number | Title | Issue Date |
| 5503735 | Membrane filtration system with control valves for optimizing flow rates A liquid purification system is disclosed. In this system water is pumped into a filter cartridge. A reverse osmosis filter membrane in the filter cartridge removes impurities from the water, but not all of the water passes through the membrane. Water pas... | 04/02/1996 |
| 5207897 | Floating hydrocarbons separator pump with buoyant housing and two-chamber vertically moveable member An automatic pumping system for removal of floating contaminants and oil and gasoline seepage from water wells. A vertically reciprocating cone-shaped member, like an inverted funnel, is moved between positions above and below the water surface. As it sub... | 05/04/1993 |
| 5202017 | Continuous media filter with monitoring of liquid level in distributor A continuous media filter consisting of an inclined endless belt in contact with a reservior of contaminated slurry materials with provisions for altering the speed of the belt passing through the filtered material and also the angle of inclination of the... | 04/13/1993 |
| 5202016 | Streaming current detector with head-creating passageway and fluid treatment system using same A device for detecting and monitoring the charge condition of finely divided solid charged particles in a fluid-flow is so devised as to accept the continuous and full volumetric flow of the fluid and to automatically and repeatedly sample and measure the... | 04/13/1993 |
| 5200064 | Fuel contamination detector A fuel contamination detection system for use in testing the contamination level of a fuel sample, wherein the system is selectively operable in a first mode as a particulate detector and in a second mode as a free water detector. A filter support slide i... | 04/06/1993 |
| 5198116 | Method and apparatus for measuring the fouling potential of membrane system feeds The optimum antifoulant concentration and cleaning interval for reverse osmosis membranes is determined by providing samples of a liquid to be purified in a reverse osmosis system, the samples having a range of antifoulant concentrations added. The zeta p... | 03/30/1993 |
| 5192435 | Self-cleaning vacuum head for recovering oil from beaches and the like A self-cleaning vacuum head is disclosed which has the ability to discriminate between particles of different size, or the ability to separate fluids from particulate matter. The invention has two relatively moving surfaces which provide a changing locus ... | 03/09/1993 |
| 5190665 | Process and apparatus for removing carbon dioxide and stripping another component from a liquid stream The continuous treatment of a liquid stream for removing a selected component therefrom, includes depressurizing the liquid stream to remove carbon dioxide, forming a carbon dioxide stream and a component-laden stream (17); raising the pH of the component... | 03/02/1993 |
| 5190659 | Contamination removal system employing filtration and plural ultraviolet and chemical treatment steps and treatment mode controller An improved cross-flow granular filtration system involving the use of ultraviolet, ozonation, chlorination, reactive granular filtration media, chemical regeneration, and central flow control is described. The process system and apparatus includes a liqu... | 03/02/1993 |
| 5188728 | Clogging display with shape memory alloy spring actuator A fluid filter clogging display comprising a case of non-magnetic material divided into an upper housing, at atmospheric pressure, and a lower housing by an impermeable membrane, a piston movable in the lower housing and dividing the lower housing into a ... | 02/23/1993 |
| 5186822 | Wave powered desalination apparatus with turbine-driven pressurization A desalination apparatus including pressure responsive desalination means, a storage tank and conduit means connecting such storage tank to a pump mounted in a caisson defining a resonant chamber having an opening in one side thereof for receiving the inc... | 02/16/1993 |
| 5185084 | Method and apparatus for control of flow through a filter chamber by measured chamber equilibration pressure A method and apparatus for the controlled instrumentation processing of cells and other paricles with a filter device measures a parameter of the flow through the filter device of a fluid carrying the particles. A measure of the change of fluid flow throu... | 02/09/1993 |
| 5185078 | Separator apparatus and method for regenerating emulsions with downstream monitoring filter A separator for regenerating used emulsions from cooling lubricants or cleaning solutions, for example, includes a discharge pipe for discharging the regenerated emulsion. The time between two sediment clearance processes is increased without adversely af... | 02/09/1993 |
| 5183562 | Apparatus for coagulating treatment An apparatus for coagulating treatment which is capable of controlling the amount of addition of a coagulant to the optimum level thereby minimizing the water content of the dehydrated cake comprises coagulant adding devices (6), (7), and (8) for causing ... | 02/02/1993 |
| 5182027 | Process for treating ammonia and nitrite containing waters to reduce nitrogen oxide emissions therefrom A process is provided for controlling the emission of nitrogen dioxide from, and the growth of living organisms in, steam condensate cooling towers and catch basins used in conjunction with a condensate of steam derived from an ammonia containing geotherm... | 01/26/1993 |
| 5180486 | Potential flow centrifugal separator system for removing solid particulates from a fluid stream Solid particulates are removed from a solid particulate-laden fluid stream by passing the solid particulate laden fluid stream into a potential flow centrifugal separator which splits the potential solid particulate-laden fluid stream into a clean fluid s... | 01/19/1993 |
| 5176823 | Odor control system for wastewater settling tank with gas velocity test probes An odor control system for a settling tank containing a pool of wastewater to be clarified in which suspended particles are removed by gravitational settling and the water at the surface of the pool is clarified. Supported within the tank is an elongated ... | 01/05/1993 |
| 5176827 | Filter underdrain with means to increase gas flow during simultaneous gas/liquid backwashing An underdrain lateral for a liquid purification system is described. The lateral has three chambers, a primary chamber, a compensating chamber, and gas chamber. Turbulence is minimized during cleansing of the purification media by isolating the gas from t... | 01/05/1993 |
| 5176825 | System for treating food waste by centrifugal spin drum and bag filter This invention provides means whereby the liquid component can be separated from the solids in food waste and garbage. The invention provides a spinning perforated drum with an internal filter bag through which liquid and fine solids pass by centrifugal f... | 01/05/1993 |
| 5174972 | Fluorogypsum waste solidification material A process, and the product produced thereby, for the preparation of a waste solidification material from hardened fluorogypsum as a by-product of the manufacture of hydrofluoric acid by reacting fluorospar with sulfuric acid, removing hydrogen fluoride fr... | 12/29/1992 |
| 5173178 | Water purifying apparatus with timed discharge after non-use periods An under-sink type water purifier with a water-tap portion connected to a purified-water outlet of the purifier having a sensor for sensing an object to issue a signal, and a solenoid valve for starting and stopping the discharge of purified water from th... | 12/22/1992 |
| 5173196 | Dewatering and compacting equipment with high pressure pumping arrangement A device for the removal of solids from slurries by continuous compaction in a screen chamber. Pressure of liquid in the chamber causes continuous extrusion of a dewatered solid from an open ended chamber. The walls of the chamber may be constructed from ... | 12/22/1992 |
| 5171429 | Apparatus for discharging water with passage selection sensor The present invention provides an apparatus for discharging water wherein light is emitted to the output water so as to visually identify kinds of water and like. The apparatus includes sensors (9, 29, 134) for sensing characteristics of water, such as th... | 12/15/1992 |
| 5171455 | Method and apparatus for separation of toxic contaminants by nebulization Small quantities of one or more liquids having a low boiling point dispersed with a large quantity of one or more immiscible liquids having a higher boiling point are separated in a rapid and efficient manner. A non-reactive gas (nitrogen, helium, air, or... | 12/15/1992 |
| 5171431 | Electronic lime controller with controls responsive to flow rates and water hardness An electronic lime controller for controlling lime adjusts for water hardness and the water flow rate in a water system. The controller includes a control for adjusting the frequency of a controller output signal which creates a magnetic field via first a... | 12/15/1992 |
| 5171435 | Dehydrator tub for clothes washing with controlled variable rotational speeds A dehydrator for use in washing clothes or the like includes a dehydration tub mounted in an outer cabinet, a brushless motor for rotating the dehydration tub for a dehydrating operation, and a microcomputer-based controller for controlling the rotational... | 12/15/1992 |
| 5169541 | Hazardous materials spillage inhibitor for use with service station fuel filters Apparatus and methods are described for inhibiting the unintentional spillage of hazardous materials, particularly while changing filters or other storage media in environments such as service station fuel dispensers and other fuel depots. A preferred emb... | 12/08/1992 |
| 5167833 | Rotary distributor/auxiliary backup drive mechanism for trickling filter systems The present invention deals with wastewater treatment systems, and more particularly with trickling filter systems using distribution tubes or arms rotating about a central point above filter beds to distribute wastewater thereto. The present invention co... | 12/01/1992 |
| 5167832 | Method for dewatering particle collections controlled by monitoring changing mass The invention relates to a method for dewatering particle collections with the aid of a filter press in a cyclic sequence comprising filling, dewatering and emptying stages. The various stages within each cycle and between consecutive cycles are followed-... | 12/01/1992 |
| 5167802 | Apparatus for sampling pesticide residues in run-off with control of sample pump and distributor valve A water sampling device for field use operates in cleaning and sampling modes and includes a distributor valve that provides selective connection of a sample pump to a plurality of collection units so that a plurality of samples can be taken. The collecti... | 12/01/1992 |
| 5167836 | Method for controlling press filter motors with a frequency converter The invention concerns a method for controlling a press filter, said press filter having electric motors for operating said press filter. At least one of said electric motors of said press filter is driven by a frequency filter. A logic control unit is us... | 12/01/1992 |
| 5167837 | Filtering and dispensing system with independently activated pumps in series A fluid dispensing system is provided which has first diaphragm pump means, a filter connected to receive the discharge of the first pump, and second diaphragm pump means connected to the receive the discharge of said filter. Hydraulic fluids pumped by cy... | 12/01/1992 |
| 5167834 | Process for treating nitrite-and sulfide-containing water to reduce nitrogen oxide and hydrogen sulfide emissions therefrom A process for abating the emission of hydrogen sulfide and nitrogen oxide from a condensate of steam, derived from a sulfide- and nitrite-containing geothermal brine, comprising introducing an oxidizing agent into the condensate in an amount less than tha... | 12/01/1992 |
| 5164093 | Apparatus and method for removing metallic contamination from fluids using silicon beads A method and apparatus is provided for removing metallic contamination from a fluid or liquid that passes through a recirculating system (10) that is used for cleaning and etching semiconductor wafers. A bath 11) and fluid is provided. A recirculared flui... | 11/17/1992 |
| 5162084 | Process for monitoring and controlling an alkanolamine reaction process Monitoring and controlling the reactivation of an alkanolamine solution containing heat-stable salts of such alkanolamine with stronger acid anions and weaker acid anions by contacting the alkanolamine solution (a) with a strong base anion exchange resin ... | 11/10/1992 |
| 5160430 | Car wash system using reverse osmosis concentrate for initial rinsing and permeate for final rinsing A rollover type car wash and rinse machine which uses permeate from a reverse osmosis unit for a final rinse operation. The machine is operator controlled to wash and initially rinse cars with a spray arch using raw water and concentrate from the reverse ... | 11/03/1992 |
| 5160633 | Frontal separator system for separating particles from beverage liquids A frontal separator method and apparatus for separating particles from fluids, such as microorganisms from juice, and for providing a sample of juice having a concentrated number of microorganisms therein for ease of detection thereof, comprising a hollow... | 11/03/1992 |
| 5160609 | Centrifugal separator with discharge of separated constituents by braking moment A separator comprises a frame supporting a closed cylindrical drum, a motor for rotating the drum about a central, longitudinal axis, an inlet through which a liquid from which constituents are to be separated is introduced into the drum, and an outlet th... | 11/03/1992 |
| 5160613 | Purification underdrain with compensating chamber and baffle isolating backwash gas from backwash water An underdrain lateral for a liquid purification system is described. The lateral has three chambers, a primary chamber, a compensating chamber, and gas chamber. Turbulence is minimized during cleansing of the purification media by isolating the gas from t... | 11/03/1992 |
| 5160606 | Gray water recovery system with ozone treatment A waste water recovery system for transporting waste water to a reuse entity, such as an irrigation system, utilizing a holding tank having an upper portion and an opposite lower portion. A waste water conduit directs water into the holding tank. Water fr... | 11/03/1992 |
