Patents Assigned to Fried. Krupp Gesellschaft mit beschrankter Haftung
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Patent number: 4663764Abstract: A method and apparatus for electrically balancing the phases of a three phase arc furnace, the furnace having a vessel containing a molten bath, three electrodes above the bath, and a transformer arrangement composed of three phases, each phase including a winding, the transformer arrangement being connected to the electrode so that each electrode conducts an arc current proportional to the voltage across the winding of a respective phase, by the steps of: matching the voltages between the electrodes and the bath to one another by adjusting the spacing between at least one electrode and the bath; and establishing symmetry among the arc currents by: varying the voltage across at least one phase winding by a selected increment; measuring the arc current amplitude in the electrode associated with the at least one phase winding after each variation step; and repeating the steps of varying and measuring until the differences between the arc current amplitudes of the three electrodes are less than a given value.Type: GrantFiled: April 3, 1986Date of Patent: May 5, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter/HaftungInventors: Karlheinz Bretthauer, Hans-Dietrich Obenauf
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Patent number: 4652686Abstract: A process for producing hydrocarbons from biological sludge, wherein the sludge is treated at a temperature of from 300.degree. to 600.degree. C. and at a pressure of from 100 to 500 bar to cause cracking of the organic compounds present in the sludge, the sludge is simultaneously or immediately thereafter hydrogenated with hydrogen under the same pressure and temperature conditions in the presence of a catalyst, and thereafter the resulting gas phase is separated into its components by stepwise reduction of pressure and/or temperature; thereby disposing of the biological sludge without environmental damage and with the simultaneous recovery of hydrocarbons.Type: GrantFiled: April 2, 1985Date of Patent: March 24, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Hubert Coenen, Heinz Effelsberg, Rainer Hagen
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Patent number: 4646854Abstract: A hydraulic striking device (1) includes a percussion piston (3) which reciprocates in an operating cylinder (2) and strikes a bit (4). The reciprocation is governed by a control valve (10) which is connected to the operating cylinder by a control conduit (27). A holding valve (30) in the control conduit has three connections (27a, 27b, 31): one with the control valve, one with the operating cylinder, and one with the return conduit (17). The connections (27a, 31) which are connected with the operating cylinder and with the control conduit are axially aligned and form the outlets of a hollow cavity (53) in which a preferably spherical movable valve body (54) is disposed, the cross-sectional area of the valve body being smaller than that of the cavity. The connection (27b) with the control valve opens radially into the cavity.Type: GrantFiled: November 26, 1985Date of Patent: March 3, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Friedrich-Karl Arndt, Karlheinz Fritz
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Patent number: 4648079Abstract: A method for troubleshooting an underwater acoustic transducer array comprising a plurality of transducers so as to test the operationally installed underwater transducer array on board for its operational reliability and to be able to localize malfunctioning transducers. For this purpose, a sinusoidal test signal, preferably the transmitted signal itself, is fed through a connecting line into the transducer array from a location remote from the transducer array and the current flowing through the transducers is detected by at least two samplings as the real component and the imaginary component with respect to the test signal. The sampling values are transmitted back to the remote location and the admittance of each transducer is determined from the ratio of the real component and of the imaginary component of the current to the test signal amplitude. A significant deviation from the known admittance at the test signal frequency is interpreted as a transducer malfunction.Type: GrantFiled: June 20, 1984Date of Patent: March 3, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventor: Wolfgang Stedtnitz
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Patent number: 4645899Abstract: In a plasma torch having an output end, the torch including an electrode having a longitudinal axis, and a generally cylindrical nozzle body surrounding, and positioned concentrically with, the electrode and the nozzle body, the nozzle body includes: a radially symmetrical, generally cylindrical inner wall spaced radially from the electrode; a radially symmetrical, generally cylindrical outer wall surrounding, and arranged concentrically with respect to, the inner wall; a front end wall located in the vicinity of the torch output end and joining together the inner and outer walls; and an electrical insulating component forming part of at least one of the inner and front end walls and extending entirely across its associated wall for electrically insulating the inner and outer walls from one another at at least one location in the vicinity of the front end wall.Type: GrantFiled: September 27, 1985Date of Patent: February 24, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Hans J. Bebber, Heinrich-Otto Rossner, Gebhard Tomalla
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Patent number: 4642401Abstract: A process for the production of liquid hydrocarbons from old tires, cable wastes, polyethylene wastes and/or polypropylene wastes, by which the waste products, in pulverized form, are treated at a temperature of 150.degree. to 500.degree. C. and a pressure 20 to 300 bar with a solvent which is liquid at 1 bar and 20.degree. C. to form a solvent phase charged with liquid hydrocarbons and a residue phase. The charged solvent phase is separated from the residue, and the separated charged solvent phase is resolved into its components by lowering of pressure and/or temperature, and by distillation.Type: GrantFiled: July 16, 1984Date of Patent: February 10, 1987Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Hubert Coenen, Rainer Hagen
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Patent number: 4631994Abstract: A linearly and angularly adjustable holder for a cutting tool having primary and secondary cutting edges includes a basic element, a receptacle element for the cutting tool rotatably mounted on the basic element, and a setting element slidably mounted on the basic element.The receptacle element is mounted on the basic element so as to be pivotal about the point of intersection of the primary and secondary cutting edges of the cutting bit. An adjustment screw 50 whose threaded portion is seated in the basic element and whose head engages a recess in the receptacle element serves to perform the angular adjustment. The linear adjustment is accomplished with the aid of a double threaded adjustment screw which connects a wedge and the basic element and which slidably engages the setting member to control the length of the holder.Type: GrantFiled: June 22, 1984Date of Patent: December 30, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Willi Jester, Norbert Reiter
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Patent number: 4632700Abstract: Method and apparatus for supplying thermal energy to a metal melt present in a receiving vessel after having been discharged from a melting furnace, the receiving vessel having a central axis, by disposing at least two plasma torches above the melt in the receiving vessel to direct a transferred electric arc at the melt; and operating the torches with alternating current and with a gas which is inert to the metal melt, while cooling the torches with water.Apparatus according to the invention includes a cover over the top of the vessel, the cover having a passage for the electrodes, and a component establishing a gas-tight seal between the cover and the electrodes.Type: GrantFiled: October 8, 1985Date of Patent: December 30, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Hans J. Bebber, Dieter Neuschutz, Heinrich-Otto Rosser
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Patent number: 4631014Abstract: A time curing press includes an upper mold part which is movably arranged by means of long-stroke cylinders relative to a lower mold part. Extending at a central area of the upper mold part and connected thereto is a vertical guide bar which is supported in a headpiece of the frame of the press. The guide bar is provided with a vertically adjustable not which is engaged by clamp jaws to lock the mold, i.e. the upper mold part with the lower mold part in the closed position of the press.Type: GrantFiled: November 21, 1985Date of Patent: December 23, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Gunter Drewel, Horst Enoch, Klaus Grotkasten
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Patent number: 4626464Abstract: A wear resistant compound body is disclosed which is comprised of a metallic basic material and has a wear resistant zone which includes hard substance and/or hard metal particles in addition to the basic material. The basic material is composed of0.001 to 1.5 weight percent carbon,0.5 to 8 weight percent boron,1 to 8 weight percent niobium,0.2 to 6 weight percent chromium,0 to 30 weight percent nickel,0 to 10 weight percent manganese,0 to 6 weight percent vanadium,0 to 5 weight percent molybdenum,0 to 5 weight percent silicon, the remainder being iron.Also disclosed is a casting process for producing the compound body.Type: GrantFiled: April 25, 1984Date of Patent: December 2, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Johannes Jachowski, Helmut Klasing, Josef Blum, Paul Pant
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Patent number: 4615244Abstract: A tool assembly includes a tool holder, a tool head and a clamping arrangement for rapidly releasably tightening the tool head to the tool holder. The clamping arrangement includes a clamping bar having a longitudinal axis and being received in the tool holder and a clamping piston connected to the clamping bar for displacement therewith. The clamping piston has first and second wedge faces arranged symmetrically to the bar axis and each defining therewith a first acute angle of at least 45.degree.. The clamping arrangement further has first and second cams movable in a direction of motion perpendicular to the bar axis. Each cam has a camming face constituted at least in part by a surface defining, with the direction of motion of the cams, a second acute angle equalling the difference between 90.degree. and the first acute angle.Type: GrantFiled: February 27, 1985Date of Patent: October 7, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Norbert Reiter, Hans Tack
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Patent number: 4610585Abstract: A chuck which can be clamped into a spindle of a machine tool and which is for use with a cutting tool having a shaft with a circular cross section. The chuck includes a body provided with a central bore having an end region in which the surface of the central bore is conically shaped for receiving the shaft of the cutting tool. The body includes a shaft projecting toward its rear side. The shaft is configured to be clamped into the spindle of the machine tool and is provided with a further bore. A clamping screw is disposed in the further bore of the shaft and has a head which is accessible from the front side of the body. A pull rod is displaceably disposed in the central bore and has a threaded end extending into the end region of the central bore for connection to the shaft of the cutting tool. An attachment mechanism is provided for attaching the pull rod to the clamping screw so that displacement of the clamping screw in the further bore causes displacement of the pull rod in the central bore.Type: GrantFiled: September 7, 1983Date of Patent: September 9, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Gunther Fellmeth, Willi Jester
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Patent number: 4611313Abstract: A method for the acoustic surveying of the surface contours of the bottom of a body of water by means of a crossed fan beam echo sounding arrangement wherein, for the purpose of obtaining an accurate, unfalsified surface contour, the measured contours obtained by scanning the bottom of the body of water in a direction transverse to direction of the heading of the surveying ship are recalculated by means of a continuously checked and adapted correction value. The correction value is determined from deviations between a calibration contour and a test contour. The calibration contour is a longitudinal contour which is formed from measured contours lined up in the direction of the ship's heading and cover a strip on the bottom of the body of water extending perpendicularly below the path traversed by the surveying ship. The test contour is recorded in the same manner as the measured contour but with the echo sounder pivoted by 90.degree. about the elevation axis of the ship, i.e.Type: GrantFiled: September 21, 1984Date of Patent: September 9, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventor: Rolf Ziese
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Patent number: 4610734Abstract: The corrosion resistant chromium steel which includes 3 to 45% chromium, 0.2 to 5% nitrogen and other elements. Its structure contains at least 50% ferromagnetic structure components. It is directly magnetizable and, at 400.degree. C., has a yield strength of R.sub.p0.2 >400 N/mm.sup.2 and, at 600.degree. C., a yield strength of R.sub.p0.2 >250 N/mm.sup.2. To produce this chromium steel, a prealloy containing at least 50% ferromagnetic structure components is nitrogen enriched under pressure, is then hot worked, then annealed at 800.degree. to 1250.degree. C. and finally cooled to room temperature. A tempering treatment at 450.degree. to 750.degree. C. may follow.Type: GrantFiled: March 1, 1985Date of Patent: September 9, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Jurgen Hartwig, Paul Pant
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Patent number: 4610548Abstract: A homogenizer, with which the homogenization power is minimized while maintaining good homogenization, and with which at the same time the conveying power of the homogenizer is increased. This is achieved via a constant free cross-sectional area within the individual homogenizing stages, and by a hydrodynamically favorable design of the free space which surrounds the tools of the homogenizer. Baffle elements or a subsequently connected second pump stage can be provided.Type: GrantFiled: November 19, 1984Date of Patent: September 9, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Peter Hallet, Erwin Hess, Hans-Jurgen Mertens
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Patent number: 4602671Abstract: In a method for oscillating an inherently rigid horizontal continuous casting mold for metals, by subjecting the mold to sinusoidally oscillating horizontal stroke movements alternately in the casting direction and in the direction opposite to the casting direction, while casting is advanced in the casting direction and is removed continuously, the mold is oscillated at a frequency, f, of at least about 100 cycles/minute, and the oscillation frequency, f, and mold stroke, H, are given values related to casting rate, V.sub.0, such that the average value of 2 fH/V.sub.0 is at least 0.64 and the displacement of the mold relative to the casting during each movement of the mold in the casting direction is no greater than 1 mm.Type: GrantFiled: December 3, 1984Date of Patent: July 29, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventor: Erling Roller
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Patent number: 4601324Abstract: A twin-belt continuous casting apparatus has a central support assembly (formed of rollers) in alignment with the mold chamber and arranged for backing up a respective casting belt at a plurality of locations; and lateral support assemblies in alignment with a respective side dam of the apparatus for backing up a respective casting belt against the side dams. Each lateral support assembly comprises a plurality of serially-arranged rolling bodies and a guiding arrangement for guiding each rolling body for a rolling advancement in the casting direction through a length portion while contacting a respective casting belt and for returning each rolling body from a downstream end of the length portion to an upstream end thereof while being out of contact with and oriented away from the casting belt. The length portion extends substantially from the inlet of the mold chamber and has a length which is, at the most, one fourth of the length of the mold chamber.Type: GrantFiled: July 26, 1985Date of Patent: July 22, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Gerd Artz, Gerhard Beckmann, Dieter Figge, Clemens Philipp
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Patent number: 4594496Abstract: A plasma burner for introducing an ionizable gas stream into an electric arc comprises a nozzle having an outlet opening for discharging the gas stream. The outlet opening is defined by an outlet part of the nozzle; the outlet part has an inner nozzle face conically tapering, at an acute first cone angle, in a direction of the outlet opening. The plasma burner further has an electrode surrounded by the outlet part and having an outer electrode face conically tapering, at an acute second cone angle, in the direction of the outlet opening. The inner nozzle face and the outer electrode face together define a conical annular channel.Type: GrantFiled: November 9, 1983Date of Patent: June 10, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Hans J. Bebber, Heinrich-Otto Rossner, Gebhard Tomalla
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Patent number: 4584015Abstract: Process and system for the production of very pure alloys. The starting materials are first melted and vacuum treated in an induction crucible inside a vacuum melt system, and then are poured into a second melt crucible, and there brought to casting temperature and held there. An opening beneath the melt in the second melt crucible is used for pouring out the melt. The system for carrying out the process comprises a vacuum melt crucible assembly containing an induction melt crucible and a second melt crucible. The second melt crucible has an orifice in its lower area which is operated by a sealing arrangement. A chamber is arranged underneath the second melt crucible.Type: GrantFiled: September 25, 1984Date of Patent: April 22, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Jurgen Hartwig, Johannes Jachowski, Paul Pant
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Patent number: 4582607Abstract: A method is disclosed for the biological aerobic purification of waste waters wherein a temperature from 30.degree. to 60.degree. C. is maintained in a first process stage and a temperature from 20.degree. to 40.degree. C. is maintained in a second process stage, with the temperature in the first process stage always being higher than the temperature in the second process stage and wherein a part of the activated sludge of the second process stage, after being seperated, is returned to the first process stage. The process provides a high decomposition output and produces an activated sludge which exhibits good sedimentation behavior.Type: GrantFiled: March 1, 1985Date of Patent: April 15, 1986Assignee: Fried. Krupp Gesellschaft mit beschrankter HaftungInventors: Siegfried Kiese, Ulrich Scheffler