Patents Assigned to Envirotech Corporation
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Patent number: 4133733Abstract: An electrolytic titration cell of an electrolytic titration apparatus includes a reaction chamber without baffles and means for introducing gas as the means to mix electrolyte contained in the chamber. The cell further includes means for maintaining a constant level of electrolyte in the reaction chamber and electrodes removably mounted by means of septa.Type: GrantFiled: June 17, 1977Date of Patent: January 9, 1979Assignee: Envirotech CorporationInventor: Robert T. Moore
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Patent number: 4130018Abstract: An ultrasonic transducer for a system for determining liquid levels by echo ranging composed of a housing including a piezoelectric crystal mounted within the housing to transmit acoustic waves, an impedance matching medium mounted within the housing adjacent the crystal and including a window layer and a diaphragm layer to transmit acoustic waves between the crystal and a gaseous environment which window layer is composed of a material having hollow glass spheres dispersed therein, and a dampening backing mounted in said housing to abut the crystal which backing includes a plurality of solid lead spheres; a tube mounted to extend from the housing to form a beam of acoustic waves propagated from said crystal, the tube having an end which is telescoped into the housing and spaced a short distance from the diaphragm to form a gap for flow communication; and a reference reflector assembly mounted to extend from adjacent said housing, which assembly includes a U-shaped member having two legs extending in slideablType: GrantFiled: August 30, 1977Date of Patent: December 19, 1978Assignee: Envirotech CorporationInventors: George L. Adams, David Aker, David Silvermetz
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Patent number: 4130463Abstract: Apparatus for connecting two otherwise coupled railroad vehicles in gaseous flow communication comprises first and second ducts each mounted respectively at one end to one of the railroad vehicles, first and second coupling ducts each mounted respectively at an opposite open end of the first and second ducts to pivot about a vertical axis with one end enclosed in its respective duct and with a second end extending out from its respective duct, first and second frame members each mounted respectively at the second end of the first and second duct and having a mating surface circumferentially surrounding the second end, and first and second biasing means to extend between the respective pair of duct and coupling duct to urge the second end away from its duct and maintain the respective mating surfaces in abutting and sliding engagement one with the other.Type: GrantFiled: August 10, 1977Date of Patent: December 19, 1978Assignee: Envirotech CorporationInventor: Samuel N. Klavir
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Patent number: 4125360Abstract: A steam atomizing burner which can alternatively burn gas, oil or a combination of gas and oil which comprises a burner introducing a major portion of the oxidizer required to produce combustion downstream of the fuel nozzle.Type: GrantFiled: October 28, 1976Date of Patent: November 14, 1978Assignee: Envirotech CorporationInventor: James F. Culbertson
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Patent number: 4110210Abstract: A flotation process wherein hydraulic effects are used to disperse gas bubbles throughout a contained liquid body with a free surface. The process comprises ejecting a two-phase fluid into the liquid body with the density and the kinetic energy of the ejected fluid per unit of the contained volume being such as to define a point within the area encompassed by Regions I and II in the graph of FIG. 2.Type: GrantFiled: April 26, 1977Date of Patent: August 29, 1978Assignee: Envirotech CorporationInventors: Vernon R. Degner, William V. Colbert
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Patent number: 4107028Abstract: An improved process for filter dewatering of an iron ore concentrate slurry produced from iron ore by selective flocculation followed by flotation wherein acid and then a surface tension reducing agent of the sulfosuccinate class is added to the concentrate slurry before the slurry is filtered.Type: GrantFiled: January 27, 1977Date of Patent: August 15, 1978Assignee: Envirotech CorporationInventors: Robert C. Emmett, Jr., Stanley D. Heden, Roger P. Summerhays
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Patent number: 4105560Abstract: A filter press for mechanically separating solids from liquid, slurries, suspensions and the like having a rigid frame including a first stationary end member which is a filter press head, a second stationary end member, and a pair of side rail members which extend horizontally and parallel to each other and which are supported at their opposite ends by the stationary end members. The filter press also includes a first and a second set of filter plates mounted for sliding movement on said side rail members and means interconnecting the plates in each set to allow limited travel of the interconnected plates away from one another while also allowing adjacent plates to move into abutting relationship with one another.Type: GrantFiled: February 14, 1977Date of Patent: August 8, 1978Assignee: Envirotech CorporationInventor: William L. Fismer
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Patent number: 4096053Abstract: Apparatus for continuous electrowinning of copper bearing slurries, including an electrowinning cell wherein a slurry composed of a suitable electrolyte and a copper-bearing solid material, is subjected to the simultaneous reactions of dissolving the copper material and plating out elemental copper as a relatively pure copper product. The apparatus and process also includes means to purify the copper-bearing material before passage to the electrowinning cell so as to prevent contamination of the electrolyte in the cell and, also, a means to recover sulfur which is released during the electrowinning and unreacted copper material.Type: GrantFiled: January 17, 1977Date of Patent: June 20, 1978Assignee: Envirotech CorporationInventors: Robert C. Emmett, Jr., James K. Dicksa, Bruce C. Wojcik, Frank A. Baczek
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Patent number: 4092764Abstract: A manifold apparatus is provided in the bottom region of a carding machine for pneumatically transporting waste and trash to one side of the carding machine for capture and further includes an air recirculating system individual to the carding machine for use in conjunction with the bottom manifold.Type: GrantFiled: December 3, 1976Date of Patent: June 6, 1978Assignee: Envirotech CorporationInventors: Arthur E. Thomas, E. Alan Pace
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Patent number: 4082671Abstract: The following disclosure teaches means for thickening primary and secondary sewage sludge. The disclosed apparatus comprises a tank having upper and lower feedwells disposed therein. Primary sludge is introduced into the lower feedwell and flows into the lower part of the tank to thicken therein. Secondary sludge is aerated under super atmospheric pressure and introduced into the upper feedwell so that it flows therefrom and thickens in the uppper part of the tank by flotation type thickening.Type: GrantFiled: September 30, 1976Date of Patent: April 4, 1978Assignee: Envirotech CorporationInventor: Earl M. Kelly
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Patent number: 4079483Abstract: An air circulating system individual to a card machine is provided for use with a manifold apparatus for pneumatically cleaning about the carding machine.Type: GrantFiled: December 3, 1976Date of Patent: March 21, 1978Assignee: Envirotech CorporationInventor: Harry H. Hicks
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Patent number: 4066520Abstract: Apparatus and process for continuous electrowinning of copper bearing slurries, including an electrowinning cell wherein a slurry composed of a suitable electrolyte and a copper-bearing solid material, is subjected to the simultaneous reactions of dissolving the copper material and plating out elemental copper as a relatively pure copper product. The apparatus and process also includes means to purify the copper-bearing material before passage to the electrowinning cell so as to prevent contamination of the electrolyte in the cell and, also, a means to recover sulfur which is released during the electrowinning and unreacted copper material.Type: GrantFiled: September 1, 1976Date of Patent: January 3, 1978Assignee: Envirotech CorporationInventors: Robert C. Emmett, Jr., James K. Dicksa, Bruce C. Wojcik, Frank A. Baczek
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Patent number: 4063457Abstract: An ultrasonic sensing device for sensing the presence or absence of a liquid at various predetermined levels, especially in storage tanks, bilges and the like, employing multiple high frequency transducer assemblies having transmitting and receiving means enclosed in a sound conductive, e.g. metallic housing of special design minimizing "cross-talk" associated with means responsive to signals received above a selected minimum response level, the system being characterized by an on-off response provided by signal attenuation to a value less than said minimum response level in the absence of the liquid.Type: GrantFiled: September 27, 1976Date of Patent: December 20, 1977Assignee: Envirotech CorporationInventors: Nikita Zekulin, George L. Adams
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Patent number: 4055494Abstract: A machine is disclosed for separating solids from feed liquor by gravity settling to form thickened subnatant. The machine includes a liquid-holding tank having an upstanding tubular column mounted therein for receiving the feed liquor. An inlet is formed in the upper portion of the column to admit clarified supernatant into the column for mixing with, and dilution of, the feed liquor. A plurality of subadjacent compartments include reagent introduction and mixing means to receive the feed liquor and to mix a chemical flocculating reagent thereinto. At the bottom of the column is an outlet to discharge the flocculated liquor directly into a pulp blanket stratum established within the tank.Type: GrantFiled: February 14, 1977Date of Patent: October 25, 1977Assignee: Envirotech CorporationInventor: Robert C. Emmett, Jr.
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Patent number: 4053281Abstract: Measured sample quantities of sulfureous matter are introduced into a sealed chamber where the samples are pyrolyzed to form sulfur dioxide and sulfur trioxide gases and to oxidize organic substances to form carbon dioxide gas. The gases are then passed through a free sulfur-absorbing packing and into a scrubbing zone wherein transition metal amine complex is used to remove sulfureous compounds without reaction with the carbon dioxide gas. The scrubbed gases are then analyzed to determine the carbon dioxide content thereof.Type: GrantFiled: January 31, 1975Date of Patent: October 11, 1977Assignee: Envirotech CorporationInventor: Melvin Keith Carter
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Patent number: 4039307Abstract: Gas-liquid contacting efficiency is enhanced in a horizontal scrubbing vessel having first and second baffle means forming a series of side-by-side compartments across the vessel and arranged so that gas flows from the upper-most portion of each compartment and is directed downward so as to enter the next downstream compartment at the bottom-most portion thereof for upward flow therein. Scrubbing liquid is sprayed downward into each compartment for countercurrent gas-liquid contact herein. The liquid collected at the bottom of each compartment is passed to the top of the next upstream compartment for full countercurrent flow through and across the vessel, with the scrubbing liquid being reactivated and recycled to the furthermost downstream compartment. When a common liquid collection means is provided for all compartments, the reactivated liquid can be recycled to the spraying means of each compartment in parallel so that the gas contacts freshly reactivated liquid in each compartment.Type: GrantFiled: February 13, 1976Date of Patent: August 2, 1977Assignee: Envirotech CorporationInventor: Frank Samuel Bondor
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Patent number: 4022697Abstract: An apparatus for separating solids from liquids by sedimentation includes a covered tank in which a sediment-engaging raking structure is journaled for rotation about a central support pier. The raking structure is driven by a unit which travels about the periphery of the tank outside the enclosure. A gas-tight seal is effected between the tank, the cover and the drive unit by the combination of an annular liquid-holding launder which is fixedly supported to surround the interior of the tank, a rigid U-shaped member which connects the drive unit to the raking structure with its lower portion submerged in the liquid held in the launder, and a continuous baffle-like wall extending from the tank cover downwardly into the space bounded by the submerged portion of the U-shaped member.Type: GrantFiled: March 6, 1975Date of Patent: May 10, 1977Assignee: Envirotech CorporationInventor: Peter Jerome Pankuch
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Patent number: 4019963Abstract: In a coke quench car having a hood and a draft inducing mechanism or exhaust device, a closure plate apparatus is associated with the coke oven push guide and is positionable with respect to the open side of the quench car so as to substantially close the open side of the car. The gap between the guide and the edges of the open side of the quench car are draft openings through which air is drawn by the draft inducing mechanism to withdraw gaseous and particulate emissions from the coke as it is pushed into the car. The gap confines or concentrates the inflow of air so as to prevent discharge of gaseous or particulate emissions around the hood of the car.Type: GrantFiled: October 6, 1975Date of Patent: April 26, 1977Assignee: Envirotech CorporationInventor: John F. Hanley, Jr.
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Patent number: 4013023Abstract: The following disclosure teaches ways and means for incinerating organic wastes in a multiple hearth furnace equipped with an afterburner. In the furnace, the wastes are pyrolyzed in an oxygen deficient atmosphere which is regulated to only partially complete the oxidation of the organic substances which are pyrolyzed from the wastes. In the afterburner, air is introduced to complete the oxidation of the partially oxidized substances carried by gases and vapors from the furnace. The air supply to the afterburner is controlled so that, at temperatures above a predetermined temperature, the quantity of air introduced is increased with increasing temperatures and is decreased with decreasing temperatures. In other words, the pyrolyzing furnace is caused to operate with a deficiency of air over its operating range, while the afterburner is caused to operate with excess air and the amount of excess air supplied is used to control the operating temperature by quenching.Type: GrantFiled: December 29, 1975Date of Patent: March 22, 1977Assignee: Envirotech CorporationInventors: Luis A. Lombana, Jose G. Campos
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Patent number: D247480Type: GrantFiled: April 28, 1976Date of Patent: March 14, 1978Assignee: Envirotech CorporationInventor: Channing Wallace Gilson