Density Or Specific Gravity Sensing Patents (Class 210/740)
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Patent number: 5837151Abstract: A centrifugal soil separator for a dishwasher having a rotating centrifuge connected for rotation with a centrifugal impeller, the centrifugal impeller providing a majority of recirculating wash water for the dishwasher while the centrifuge accepts a second portion of flow and spins that portion of flow for soil separation and to achieve a pumping action to move that quantity of water to the wash water delivery system with the quantity of water moved by the centrifugal impeller. By a coordinated stopping, reversing and starting action of the centrifuge, soil collected therein can be disposed to a soil sizing and drain apparatus for flushing and draining the centrifuge.Type: GrantFiled: April 29, 1997Date of Patent: November 17, 1998Assignee: Whirlpool CorporationInventor: Todd M. Jozwiak
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Patent number: 5824228Abstract: A method and apparatus for removal of a phase from a biphase system having an interface between the phases includes a sensor for sensing a level of the phase of highest density arranged beneath and at a distance from the plane of the suction port of a tube and a device for guiding and moving the tube and the sensor with respect to the reservoir, in a reciprocal, rectilinear path parallel to an axis of the tube.Type: GrantFiled: January 22, 1997Date of Patent: October 20, 1998Assignee: Rhone-Poulenc ChimieInventors: Denis Bolomier, Maurice Bailloud, Pascal Dubost
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Patent number: 5620606Abstract: Method/system of adding solid particles to inhibit or prevent plugging in a reactor at conditions such that the temperature and pressure are at least in the vicinity of supercritical conditions for water. Particles may be added in conjunction with a pH-adjusting material, thereby inhibiting plugging in the reactor caused by addition of the pH-adjusting material. Reactor pressure may be reduced by flowing the stream through a static restriction device.Type: GrantFiled: March 3, 1995Date of Patent: April 15, 1997Assignee: RPC Waste Management Services, Inc.Inventors: Roy N. McBrayer, Jr., Jimmy G. Swan, John S. Barber
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Patent number: 5545333Abstract: A belt filter press having a wedge zone which can be adjusted during operation of the filter press to prepare a sludge or other material to be deliquified in the most efficient manner for high pressure deliquification also includes a sealing arrangement for sealing the marginal edges of the upper and lower belts, a tapered slide cam assembly on either side of the belts for adjusting the wedge angle in a controlled manner, rack and pinion assemblies associated with hydraulic cylinders on either side of the belts to ensure the uniform movement of the lower belt supports, and the staggered arrangement of upper and lower belt support members where the lower belt support members are concave-like in shape to facilitate the sealing of the marginal edges of the belts, as well as to form a confined pocket which will facilitate the shearing action induced in the material to be deliquified.Type: GrantFiled: May 26, 1995Date of Patent: August 13, 1996Assignee: Komline-Sanderson Engineering Corp.Inventors: James A. Louden, Brian F. Hawkins, Wayne D. Hann, Sr., deceased
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Patent number: 5529695Abstract: A system for removing particulates, formed as metal is machined, from coog and lubricating fluid. The system has a tank filled with fluid. The bottom of the tank slopes forward. The tank receives contaminated fluid at its top rear. The contaminants are swarf (chips removed from the workpiece) and fines (which come both from the workpiece and the grinder, borer, or drill). After the swarf is removed from the contaminated fluid by a magnetic filter, only fines remain. The fluid contaminated with fines flows from back to front in the tank, passing under a baffle projecting vertically downward from the top of the tank. A whoosh plate causes the fines to settle out into the tank, while uncontaminated fluid flows over the whoosh plate and is reused. The fines collect at the tank's bottom, from where they are pumped out and mixed with the magnetically-removed swarf for removal.Type: GrantFiled: July 21, 1994Date of Patent: June 25, 1996Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Paul J. Gwozdz
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Patent number: 5462672Abstract: Sludge which is supplied from an untreated sludge tank 3 and diluting water from a diluting water supply facility 14 is charged into a continuous kneading mixer 12 for diluting the sludge to make the specific weight of the sludge 1.15 to 1.35. The diluted sludge is supplied to a dehydrating machine 25 in accordance with the capacity of the used dehydrating machine 25. The diluted sludge is firstly added with an inorganic flocculating agent G and is mixed in a first blender 24A and is then added with a high molecular flocculating agent G2 and is mixed in a second blender 24B. Thereafter, the sludge is supplied to a belt press dehydrating machine 25 in which it is subjected to a dehydrating treatment.Type: GrantFiled: August 12, 1993Date of Patent: October 31, 1995Assignees: Chemical Grouting Co., Ltd., Front Engineering Co. Ltd., Kurita Water Industries Ltd., Shoesangyo CorporationInventors: Masahiro Iji, Masami Yoda, Shin Suzuki, Kaoru Ishizuka, Sotoo Kubo, Isao Yamaki, Toshikuni Hashimoto
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Patent number: 5395603Abstract: Maximum throughput of a wet process phosphoric acid plant at a fixed recovery can be obtained by controlling the filter feed to give a desired specific gravity of the filtrate from the last washing of the gypsum cake. The filtrate from the last washing of the gypsum cake also is called the first pass filtrate. The specific gravity of this first pass filtrate provides an indication of the overall filter efficiency and the loss of water-soluble phosphoric acid to the gypsum waste stream. The specific gravity of the first pass filtrate is controlled by adjusting the rate at which product slurry from the attack tank is fed to the filter. This product slurry feed rate is affected by the mechanical performance of the filter and the filterability of the gypsum crystals, which, in turn, is affected by operating conditions in the attack tank. Therefore, the feed rates of phosphate rock, sulfuric acid, and water, are controlled to produce the desired attack tank operating conditions and to maintain attack tank level.Type: GrantFiled: April 21, 1993Date of Patent: March 7, 1995Assignee: IMC Fertilizer, Inc.Inventor: Stephen W. Hilakos
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Patent number: 5261791Abstract: Pumping apparatus for recovering a first liquid, such as a pollutant, floating on a second liquid, such as ground water. A pump immersed in the second liquid, or ground water, operates to produce a cone of depression and discharge the second liquid into a pressure vessel. A variable volume chamber inside the pressure vessel contracts and displaces any contents through an outlet conduit to a product discharge point. When the pump turns off, the variable volume chamber expands and draws product into the chamber to be driven from the chamber during successive pumping operations. Over time periodic pumping operations cause the variable volume chamber to recover the first liquid and move it to a discharge point.Type: GrantFiled: February 19, 1993Date of Patent: November 16, 1993Assignee: Advanced Remediation TechnologiesInventor: Robin A. Goguen
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Patent number: 5248442Abstract: A method and means for measuring a characteristic, in particular one associated with particle size, of any of the feed, underflow or overflow streams of a hydrocyclone is provided. Information as to the flowrate and density of the feed stream as well as the angle of flare or other related variable associated with the shape of the underflow stream are fed to processing means which applies a formula or algorithm, which is usually empirically derived, to such information to provide a value of the required characteristic. The characteristic may be related to particle size, particle size distribution in any of the streams or the liquid content or the flowrates of solids or liquids in the underflow or overflow. Measurement apparatus comprising a dedicated hydrocyclone is also provided.Type: GrantFiled: August 14, 1991Date of Patent: September 28, 1993Assignee: MintekInventor: David G. Hulbert
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Patent number: 5094757Abstract: A system for cleaning radiator systems waste coolant, including a filter, a flush tank refinery, a source of cleansing chemical, a pump to circulate radiator coolant from the vehicle through the cleaning system back to the vehicle, a quick-connect conduit extending between the vehicle and the filter, a conduit extending from the filter to the flush tank refinery, a fill tank reservoir, a conduit with valve extending from the flush tank refinery to the fill tank reservoir, a quick-connect conduit with valve extending from the flush tank refinery to the vehicle, a conduit with valve extending from the fill tank reservoir and interconnecting with the quick-connect conduit extending from the flush tank refinery to the vehicle, a conduit with valve extending from the cleansing chemical source to the flush tank refinery, a source of basic chemical, a conduit extending from the source of basic chemical to the fill tank reservoir, a pH sensor in contact with a coolant conduit and a computer to regulate cleansing andType: GrantFiled: May 24, 1990Date of Patent: March 10, 1992Assignee: Radiator Robot, Inc.Inventor: Steven T. Light
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Patent number: 5076890Abstract: The present invention relates to a method of qualitative and quantified monitoring of the instant local physical state of a substantially incompressible fluid material such as a liquid or pasty substance (for instance slurry or pulp) and a device for carrying out this method and the various applications and uses resulting from the working of the method and/or device for the automatic control of said physical state. The invention is also directed to the various equipment and systems provided with at least one such device.Type: GrantFiled: February 27, 1990Date of Patent: December 31, 1991Assignee: Dorr-Oliver IncorporatedInventor: Claude Balembois
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Patent number: 5062964Abstract: In a flotation system, the generated quantity of foam is determined and, independent thereof, process parameters which directly or indirectly affect the generated foam quantity are reduced in their quantity depending on foam quantity. This is brought about by reduction of specific substance flows and also such substance flows that circulate in a flotation system. Production waters used for dilution are partly replaced by fresh water. This precludes an excessive amount of generated foam from causing difficulties in the operation of a flotation system.Type: GrantFiled: April 6, 1990Date of Patent: November 5, 1991Assignee: J. M. Voith GmbHInventors: Herbert Ortner, Lothar Pfalzer
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Patent number: 5013488Abstract: Disclosed is a method and apparatus for preventing or minimizing scale deposition from hard water onto heat transfer surfaces in atmospheric cooling towers, such as those used in air conditioning and refrigeration systems, where evaporative cooling of water provides the necessary heat sink to the atmosphere. An electrical/mechanical control system responsive to changes in density of the water in the evaporative cooling system operates to permit discharge of water containing dissolved and suspended solids from the system when its density reaches a predetermined maximum value and to discontinue the discharge of cooling system water when its density reaches a predetermined minimum value. Water drained from the cooling system is replaced by fresh water, preferably by water containing chemical additives to increase solubility of hard water minerals in the cooling water.Type: GrantFiled: March 19, 1990Date of Patent: May 7, 1991Assignee: Khodabandeh AbadiInventors: Khodabandeh Abadi, Craig A. Hunt
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Patent number: 5002671Abstract: A hydro-cyclone includes a hollow round casing having, co-axially in series, a cylindrical portion and a frusto-conical portion tapering toward one end of the cyclone. An end plate closes off the cylindrical portion opposed to the taper end. A tangential inlet conducts a fluid flow stream to be classified tangentially into the cylindrical portion. A co-axial, heavy fraction outlet is provided at the taper end. A co-axial, light fraction outlet is provided through the end plate, preferably via a porthole in the cylindrical portion axially spaced from the end plate. The invention provides for drawing-off of fluid flowing from the inlet inwardly in a boundary layer adjacent the end plate via a circulation outlet in the end plate, preferably annularly around the light fraction outlet.Type: GrantFiled: June 8, 1989Date of Patent: March 26, 1991Assignee: Cyclofil (Proprietary) LimitedInventors: Pierre de Villiers, Gideon J. du Toit
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Patent number: 4960513Abstract: A liquid separator allows a mixture of oil and water to separate, then discharges the two fractions. A separating tank is automatically filled when a float indicates a low level. A second float is close to the bottom of the tank and has a density such that the float will just float in water. The presence of oil causes the second float to sink; and, a switch connected to the float operates either a water valve when the float rises, or an oil pump when the density is low. Lowering of the level by discharging fractions causes the first float to indicate a low level to fill the tank again.Type: GrantFiled: August 21, 1989Date of Patent: October 2, 1990Inventor: James T. Young
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Patent number: 4898679Abstract: Gaseous ozone is admixed and stored with water under such conditions that the density of ozone in the water is increased above the normally obtained and held stabily at such levels so that it may be efficiently transported through the processing plant being cleaned. Specifically, the present invention provides for the chilling of the ozone and water carrier to increase density and permit the subsequent increase in temperature to cause propulsion of the water and ozone through the plant to be cleaned in-place.Type: GrantFiled: February 1, 1989Date of Patent: February 6, 1990Inventors: Seymour Siegel, Louis Maggio
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Patent number: 4828716Abstract: Method and apparatus for partitioning a pre-selected phase of a sample of liquid, such as blood, having a plurality of phases of differing densities the method comprising the steps of introducing a sample into a chamber of constant cross-sectional shape and a volume greater than that of the sample, ordering the phases of the sample concentrically by rotating the chamber about its longitudinal axis, reducing the volume of the chamber in response to a separation control signal, removing a portion of the separated sample in order of phase, deriving information about the portion of the sample being removed from the chamber and modifying the separation control signal in response to the derived information.Type: GrantFiled: April 3, 1987Date of Patent: May 9, 1989Assignee: Andronic Devices, Ltd.Inventors: James A. McEwen, William J. Godolphin, Rainer M. Bohl, Mark N. Dance, Martin L. Furse, John C. Osborne
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Patent number: 4828717Abstract: The device for reducing the volume of an aqueous waste effluent includes a holding tank, a heating tank for receiving waste effluent from the holding tank and including a heater for heating the waste effluent to a predetermined temperature which is below the boiling point of water and high enough to cause a portion of the water to evaporate and be discharged as water vapors, an agitation pump for continuously recirculating the liquids contents of the heating tank and filter units mounted on top of the heating tank for separating solids and particulate matter from the resulting slurry and returning the filtrate to the heating tank.Type: GrantFiled: April 14, 1988Date of Patent: May 9, 1989Assignee: Arkay Corporation of WisconsinInventors: James A. DeLeeuw, Raymond E. Sims
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Patent number: 4818392Abstract: A method of treating and progressively densifying liquid waste. It comprises thoroughly mixing and aerating by a continuous mixer and/or aerating raw water and chemical treating materials, discharging the resulting mixture downwardly into a reaction compartment, thence drawing the resulting material upwardly by means of an impeller and gravity flow, then allowing a portion of the resulting denser sludge to descend downwardly by gravity into a floc tunnel, thence in a horizontal portion, further densifying and separating takes place. The remaining portion is directed horizontally against inclined, closely spaced parallel plates to clear the resulting fines mixture. Thereafter, there is still further densifying of the sludge. By this method, a very dense sludge is obtained in a relatively small space.Type: GrantFiled: November 30, 1987Date of Patent: April 4, 1989Assignee: Hazleton Environmental Products Inc.Inventors: Roy H. Werner, Randy A. Galgon, Clifford J. Decker
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Patent number: 4643834Abstract: A method and apparatus for gravitational separation of discontinuous mixtures using laminar flow coalescing techniques is disclosed. The apparatus includes a number of discrete sets of fluid interrupting surfaces arranged in series one after the other. After analyzing the physical, chemical and statistical characteristics of any given discontinuous mixture, the configuration of the surfaces can be correlated or adjusted to provide enhanced and efficient separation of the components of the mixture.Type: GrantFiled: February 3, 1986Date of Patent: February 17, 1987Assignee: Filter Plate CompanyInventor: Edward F. Batutis
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Patent number: 4514306Abstract: A system wherein suspended solids are separated from liquids by passage through a filter after a precoat of filter aid has been deposited on a filter septum. The subsequent addition of filter aid to the liquid and its deposit on the precoat are so regulated that the filter cake produced maintains a practical specific cake resistance to flow therethrough at a preselected value, even if the concentration of suspended solids varies with time, said value being the ratio .DELTA.R/.DELTA.W, where .DELTA.W is a small increment of filter aid weight fed and .DELTA.R is an incremental increase in cake resistance to flow corresponding to that increment .DELTA.W, both increments being on a per unit of filtration area, and the resistance to flow being the differential pressure across the filter cake divided by the flow rate per unit of filtration area.Type: GrantFiled: March 29, 1984Date of Patent: April 30, 1985Assignee: Monarch Wine Co., Inc.Inventor: Carlos M. Pato
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Patent number: 4439325Abstract: A method and apparatus for controlling the operation of a primary filter press to insure the attainment of a desired quality cake in the press including a conduit for feeding a slurry or composition to the filter press, transducers responsive to the volume of slurry delivered to the filter press, the rate of flow, the pressure at the inlet to the press and the characteristics of the slurry solids for producing electric signals proportional thereto, relating at least certain of the signals to compute a quantity K indicative of the quality of the cake being formed in the press when the pressure to the filter press attains 90% of the terminal pressure and modifying the characteristics of the slurry to achieve the desired volume of K. The invention further comprehends the use of a pilot filter press of significantly smaller size than the primary press and fed by the same slurry and operated in the same manner.Type: GrantFiled: July 11, 1983Date of Patent: March 27, 1984Assignee: CPC Engineering CorporationInventor: Norman J. Blais
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Patent number: 4336143Abstract: In the control of the treatment of a mixture (eg slurry, tailings or sludge) comprising solid (eg fine coal, shale, or clay) and liquid (eg water) signals are derived which are indicative of the total liquid in the mixture fed for treatment and of the cumulative discharged filtrate, the signals being processed to give an indication of the amount of liquid retained in the mixture as the treatment progresses, at least a part of the treatment being controlled in response to the derived signal comparison.Type: GrantFiled: August 11, 1980Date of Patent: June 22, 1982Assignee: Coal Industry (Patents) LimitedInventor: John Abbott
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Patent number: 4310421Abstract: A battery manufacturing operation employs a first NaOH solution for washing an intermediate product generating a waste caustic, and a second NaOH solution for impregnation. In addition, quasi-periodically a fixed quantity of waste wash water is available. The invention includes a process, and an apparatus for carrying out the process, for using the waste wash water as one component of the second NaOH solution, to which is automatically added fresh NaOH until a specific NaOH solution (25% NaOH), by weight is obtained. Thereafter, the waste caustic is added resulting in the second solution. The process is effected typically automatically notwithstanding variations in the components of the waste water, and normal variations in the flow rates, etc.Type: GrantFiled: September 29, 1980Date of Patent: January 12, 1982Assignee: General Electric CompanyInventors: Jon K. West, Kenneth LeDuc, Serge Ferrus
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Patent number: 4273658Abstract: The operation of a continuous thickener, clarifier, or similar device having a feed well into which a feed slurry of suspended solids and a flocculant are continually introduced to effect separation of the slurry into a clarified solution which is withdrawn through an overflow launder and a thickened sludge which is transported into a discharge port at the bottom of the unit is controlled by establishing the slime level at a point near the bottom of the feed well, continuously monitoring the density of the downflowing slurry within the well, and regulating the rate of flocculant addition in response to small changes in the slurry density.Type: GrantFiled: September 25, 1979Date of Patent: June 16, 1981Assignee: Exxon Production Research CompanyInventor: James S. Karman
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Patent number: 4226714Abstract: The present invention is directed to a method and apparatus for maintaining steady state conditions in a separator. Steady state is maintained by controlling mass flow rates of influent to, and underflow from the separator. Specifically, an influent specific gravity and flow rate signals are monitored by an influent mass flow controller. That controller responds to variation in these signals to maintain a constant mass feed rate into the separator. A mass flow signal, comprising a composite of influent specific gravity and influent mass flow signals, is produced. That signal is fed to a thickener controller which also monitors mass flow of the underflow. The thickener controller adjusts the mass flow rate of the underflow in response to the influent mass flow signal. However, fluctuation of an interface level between clear and unclear areas of the thickener can effect flow rate adjustment.Type: GrantFiled: December 27, 1978Date of Patent: October 7, 1980Assignee: The Anaconda CompanyInventors: Kenneth M. Furness, Manuel Quinonez, Stanley T. Low