Patents Represented by Attorney M. Snyder
  • Patent number: 5371506
    Abstract: An improvement in monopulse radar achieves nulling of multiple mainlobe jammers while maintaining the angle measurement accuracy of the monopulse ratio by using multiple simultaneous beams, thereby obtaining the additional degrees of freedom necessary for cancelling more than one mainlobe jammer (MLJ). The beams are placed one null beamwidth apart in order to maintain orthogonality. The MLJs are nulled in the orthogonal direction of the angle estimate giving undistorted monopulse ratios.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: December 6, 1994
    Assignee: General Electric Co.
    Inventors: Kai-Bor Yu, David J. Murrow
  • Patent number: 5269928
    Abstract: A clarifier tank having a center column is provided with a center-driven bottom rake mechanism for settled sludge removal, a rotating scum rake mechanism comprised of pipes with longitudinal openings for scum removal via the center column, the rake mechanisms rotating in the same or opposite directions at different speeds, and submerged effluent pipes projecting from the sidewall of the tank toward the center of the tank to drain the clarified sewage into an effluent launder exterior of the tank.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: December 14, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventor: Werner H. Leikam
  • Patent number: 5252041
    Abstract: A method and apparatus for controlling the discharge time of a fluid activated diaphragm pump. The control system regulates the discharge time, by measuring the discharge time and comparing the measured time with a predetermined desired discharge time. The control system includes, inter alia, a programmable logic controller, an upper and lower proximity switch, a target, a rod to hold the target, a pilot controlled pressure regulator, a set of digitally controlled solenoids which control a pilot valve, a solenoid, and a pressure switch. The rod is secured to the diaphragm of the diaphragm pump, and the proximity switches respond to the movement of the rod to detect the movement, or stroke, of the diaphragm. The pressure supplied to the diaphragm pump is automatically, and continuously, adjusted to maintain a desired discharge time.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: October 12, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventor: Russell Schumack
  • Patent number: 5249490
    Abstract: An adjustable wrench having a pair of spring-biased pivoted handles and a plurality of jaw members having fastener-contacting faces actuable by squeezing motion of the handles to close upon a range of sizes of hexagonal fastener members.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 5, 1993
    Inventor: George W. Kennel
  • Patent number: 5205926
    Abstract: The invention relates to an improved flotation cell design for the mining industry. The flotation cell includes a cylindrical froth flotation unit and a unique hexagonal overflow froth launder. The unique design optimizes the froth flotation process and allows for the economical utilization of a honeycomb nesting arrangement.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: April 27, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventor: George A. Lawrence
  • Patent number: 5198035
    Abstract: High-rate washing centrifuges are employed in a corn wet milling process to accomplish displacement washing of the starch and a sharp classification into starch and gluten.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: March 30, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventors: Chie-Ying Lee, Robert W. Honeychurch
  • Patent number: 5194146
    Abstract: A drum centrifuge has a housing, a drum in the housing, an axially extending outer foraminous side wall in the interior of the drum forming an outer chamber, and a transversely extending foraminous end wall in the drum forming a bypass chamber radially inward of the outer chamber. A suspension is fed to the interior of the drum while same is rotating so that the suspension is thrown centrifugally against the outer wall and separates into a radially outer body of filter cake having an inner surface and a radially inner body of liquid sitting on the inner surface. A drainage chamber is formed at the end wall and a drain passage extends between the drainage chamber and the outer chamber while a bypass passage extends between the drain chamber and the bypass chamber.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: March 16, 1993
    Assignee: Dorr-Oliver Incorporated
    Inventor: Guntram Krettek
  • Patent number: 5159598
    Abstract: An auxiliary monolithic integrated circuit chip provides both buffer amplification and testing interfaces. Off-the-shelf monolithic integrated circuit chips can be connected into an electronics system using one of these auxiliary buffer chips before each input port and after each output port, to implement functional testing similar to that done on monolithic integrated circuit chips with built-in test circuitry.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: October 27, 1992
    Assignee: General Electric Company
    Inventors: Kenneth B. Welles, II, Paul A. Delano, Richard I. Hartley, Michael J. Hartman, Abhijit Chatterjee
  • Patent number: 5076890
    Abstract: 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: Grant
    Filed: February 27, 1990
    Date of Patent: December 31, 1991
    Assignee: Dorr-Oliver Incorporated
    Inventor: Claude Balembois
  • Patent number: 5067982
    Abstract: A corn steeping process is conducted in a fluidized bed apparatus with steeping liquor introduced at the bottom of the apparatus and removed from the top of the apparatus after traversing the body of fluidized corn grains.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: November 26, 1991
    Assignee: Dorr-Oliver Incorporated
    Inventors: Abraham Caransa, Jan van den Dorpel
  • Patent number: 4969404
    Abstract: A method for treating ash produced by waste coal fluidized bed boilers in which hot ash fines and heated secondary air are introduced into the boiler as the coarse ash is cooled. An ash treatment system for cooperation with a fluidized bed boiler operating on waste fuel having a high ash content receives and classifies hot ash from the boiler, returns ash fines to the boiler, cools coarse ash fines for disposal and burns carbon associated with the ash received from the boiler.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: November 13, 1990
    Assignee: Dorr-Oliver Incorporated
    Inventor: Michael J. Virr
  • Patent number: 4914029
    Abstract: Corn or sorghum kernels are steeped in warm water containing sulfur dioxide in the presence of an enzyme preparation including one or more phytin-degrading enzymes, such as phytase and acid phosphatases, to eliminate or greatly reduce phytic acid and the salts of phytic acid.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: April 3, 1990
    Assignee: Dorr-Oliver Incorporated
    Inventors: Abraham Caransa, Timo Vaara, Martti Vaara, Maarit Simell, Antti Lehmussaari
  • Patent number: 4892656
    Abstract: A vacuum filter for the separation of solids from liquids, comprising an endlessly circulating array of troughs which constitute a common horizontal filter surface, on which an endless filter cloth is laid, in which each trough has an elastic sealing strip on that rimless edge which extends along the trough bottom transversely to the direction of movement. A good vacuum seal between two successive troughs with easy replaceability of the sealing strip is provided wherein the sealing strip is releasably clamped by a spring-loaded movable clamping bracket against the leading and/or rear edge of one of the adjacent troughs.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: January 9, 1990
    Assignee: Dorr-Oliver Incorporated
    Inventor: Kurt E. Pietzsch
  • Patent number: 4861495
    Abstract: A method of dewatering filter cake in which the cake is supported on a positively driven pervious conveyor belt or filter cloth. The cake is guided about the circumference of a drum, with the drum positively driven at a variable speed of rotation. In the region of the drum, the pervious conveyor belt or filter cloth holds the cake against the periphery of the drum and additional pressing rollers press the filter cloth and cake against the drum. The drum drives the filter cloth in this region through the medium of the filter cake and induces shear effects in the cake. The speed of rotation of the drum is regulated in dependence on the tension existing in the filter cloth.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: August 29, 1989
    Assignee: Dorr-Oliver Incorporated
    Inventor: Kurt E. Pietzsch
  • Patent number: 4853115
    Abstract: A rake classifier provides reciprocating movement using crank-mounted drive shafts to establish translatory forward movement as well as lifting and rearward movement of the rake structure.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: August 1, 1989
    Assignee: Dorr-Oliver Incorporated
    Inventors: George W. Kennel, Matthew J. Rollberg
  • Patent number: 4800017
    Abstract: An improved flotation cell for recovery of minerals from ore using a three phase system flotation process provides improved metallurgical recovery through improved rotor/stator and cell design by establishing good zonal separation within the cell and minimizing froth turbulence, providing uniform aeration in the cell, and accommodating higher aeration volumes before encountering turbulence. Parameters for the rotor/stator pump assembly, a deflector vane forming part of the stator and for pump assembly/cell configuration are disclosed.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: January 24, 1989
    Assignee: Dorr-Oliver Incorporated
    Inventors: Prem Krishnaswamy, Mark E. Hoyack
  • Patent number: 4758319
    Abstract: A membrane for dewatering a suspension of solids in a carrier liquid by means of either an electrically augmented vacuum filter (EAVF) or an electrically augmented crossflow device. The EAVF and crossflow devices both include an anodic structure comprising an anode, anolyte and a filter membrane for depositing or concentrating solids from the suspension of solids; and a cathodic structure comprising a cathode, catholyte, a catholyte chamber, and a filtrate chamber for filtering the filtrate of the bath of the suspension of solids. The catholyte chamber having a membrane wall which is liquid impervious and either an anion exchange membrane or a non ion selective membrane. Filtrate being removed at the filtrate chamber.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: July 19, 1988
    Assignee: Dorr-Oliver Incorporated
    Inventor: Peter R. Klinkowski
  • Patent number: 4737277
    Abstract: A rotary drum vacuum filter suitable for processing pulp slurries is provided with a vacuum expression belt. The invention provides a method and apparatus for tracking and controlling the belt during operation. The belt is positioned by a moveable frame for expressing filtrate from the pulp web and in operation a control unit monitors lateral movement of the belt with respect to the drum. When drifting occurs the belt is adjusted horizontally during operation to counter drift. The adjustment can be repeated as necessary. If continued drift cannot be corrected then the belt is moved vertically to an inoperative position.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: April 12, 1988
    Assignee: Dorr-Oliver Incorporated
    Inventor: Nevio Lenac
  • Patent number: 4730239
    Abstract: A solid state double layer capacitor includes an organic electrolyte doped with a soluble salt to render the electrolyte ionically conductive.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: March 8, 1988
    Assignee: Stemcor Corporation
    Inventors: John C. Currie, Linda F. DiFranco, Phillip D. Bennett
  • Patent number: 4726902
    Abstract: The cyclone degritter particularly suited for household use for receiving, degritting and discharging a water feed flow. The cyclone degritter comprises a pressurized housing containing a cyclonic degritter cartridge with a plurality of small hydro-cyclones arranged within a shell for collecting grit and an overflow vessel for directing clarified liquid to the housing overflow connection. In one form there is a bleed line from the top region of the shell or grit pot to the overflow for providing substantially improved recovery efficiency. In another form the cyclone degritter is provided with primary and secondary cyclone degritters with the primary set being used under conditions of low water flow while both primary and secondary sets are used for increased water flow.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: February 23, 1988
    Assignee: Dorr-Oliver Incorporated
    Inventor: Peter J. Hubbard