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| Number | Title | Issue Date |
| 4960439 | Arrangement for gasifying fuels An arrangement for the gasification of fuels with oxygen or oxygen-containing gases and steam, includes a shaft-like vessel for receiving solid charging stock. A gas discharge duct is provided on the upper end of the vessel and a primary gas chamber is in... | 10/02/1990 |
| 4936519 | Internal lining for ball mills An internal lining for cylindrical ball mills has riffles approximately extending in circumferential direction and webs located between the riffles and further has elevations and/or depressions arranged transversely to the circumferential direction. This ... | 06/26/1990 |
| 4913733 | Process for producing pig iron A process for producing pig iron is described involving the use of a reduction shaft furnace 1 and a melt-down gasifier 2. The sponge iron produced from iron ore in the reduction shaft furnace is fed into the melt-down gasifier and converted into a pig ir... | 04/03/1990 |
| 4913742 | Process of making cement clinker and apparatus for performing said process A process for producing cement clinker, having a preheating-, calcination and cooling zone, under addition of a secondary fuel, (retardedly)combustible components such as waste materials and/or conventional fuels being added in the zone between kiln inlet... | 04/03/1990 |
| 4884848 | Device and method for exploiting material The openpit mining device includes a cantilever arm which is swivellable around a horizontal axis and carries a support or tool carriage. The support or tool carriage is shiftably supported in a transverse relation to the longitudinal axis of the cantilev... | 12/05/1989 |
| 4880489 | Apparatus for plasma etching circuit boards or the like The circuit board plasma etching apparatus includes a preheating chamber, a plasma reaction chamber and a cooling chamber for etching circuit boards with plasma in a quasi continuous operation. The plasma reaction chamber is sealed by a gas-tight preheati... | 11/14/1989 |
| 4878714 | Cutting machine for cutting and carrying away material from a work face Then invention relates to a cutting machine having cutting heads or drums which are supported to be freely rotating on a pivoting cutting arm, with a loading ramp or conveyor which extends in the direction to the work face to receive and transport the cut... | 11/07/1989 |
| 4867787 | Mill arrangement with temporary storage vessel and a process of operating the same In operating a mill including a blast furnace and a steel converter, it is difficult to mutually adapt the operations of the blast furnace and of the converter in a flexible way. When using scrap as a coolant in the refining process, undesired accompanyin... | 09/19/1989 |
| 4866731 | Electric furnace arrangement An electric furnace includes a furnace vessel covered by a furnace lid liftable and lowerable by a lid lifting mechanism and pivotable from a position above the furnace vessel into a position lateral of the furnace vessel and back by a lid pivoting mechan... | 09/12/1989 |
| 4860978 | Control mechanism for railway switches A rail switch control mechanism including a locking clamp which is shiftable using a path rod. The locking clamp has, on an end facing the switch tonque, a swivel head. The swivel head is swivelably connected with a switch tongue. In use, the locking clam... | 08/29/1989 |
| 4840310 | Fuel injection nozzle In a fuel injection nozzle for an internal combustion engine, a valve needle and a valve needle spring are provided, in which the valve needle can be opened against the force of the valve needle spring (6). In the valve needle spring chamber (8) a displac... | 06/20/1989 |
| 4841542 | Electric furnace arrangement An electric furnace includes a furnace vessel arranged on a furnace platform and covered by a furnace lid liftable and lowerable by a lid lifting mechanism and pivotable from a position above the furnace vessel into a position lateral of the furnace vesse... | 06/20/1989 |
| 4836510 | Metallurgical plant In order to ensure that flue gases will not escape from an enclosure (1) which contains a metallurgical vessel (2) as charging boxes (10) are moved into and out of the enclosure, the charging crane (14) is disposed inside the enclosure (1) and the enclosu... | 06/06/1989 |
| 4822411 | Integrated steel mill arrangement When operating mills including a coling plant, a blast furnace arrangement and a converter steelworks, large amounts of partially high-grade so-called cupola gases, such as coke oven gas and converter exhaust gases, form, which cupola gases, so far. In or... | 04/18/1989 |
| 4805963 | Shield advancing machine A shield advancing machine, comprising cutting tools (15) rotatably supported on cantilever arms (13, 14) being rotatable around an axis approximately extending in advancing direction and being swivellable in transverse direction to this axis, has a carri... | 02/21/1989 |
| 4805756 | Loading device, in particular bucket-wheel excavator The bucket-wheel excavator comprises a swivellable bucket-wheel boom 6 and a swivellable bridge 11. At a transfer location, the bridge 11 is rotatably supported on a truncated conical superstructure 10 and the turntable b 16 l of the bridge comprises raki... | 02/21/1989 |
| 4804408 | A mill arrangement and a process of operating the same using off gases to refine pig iron In the operation of mills for the production of steel from molten pig iron and solid ferrous carriers, it is sought for economic reasons to increase the portion of solid ferrous carriers. To supply thermal carriers, such as fossile fuels, as is known, inv... | 02/14/1989 |
| 4792123 | Metallurgical plant A metallurgical plant comprises a tiltable metallurgical vessel (1) and an enclosure surrounding said vessel. The vessel is provided with a cover (6), which is adapted to be lifted and to be horizontally pivotally moved away from the vessel (1) so as to p... | 12/20/1988 |
| 4789469 | Apparatus for continuously introducing or removing gases into and/or from liquids For the purpose of introducing or removing gases into liquids or out of liquids, in particular substrates being subject to a biological conversion, rotating plates (3) are immersed into the liquid phase. The plates (3) are rotatably arranged within a tubu... | 12/06/1988 |
| 4786112 | Driving arrangement for driving the cutting rolls of a drift advancing machine In a drift advancing machine cutting rolls are rotatably supported on a centrally arranged pivoted arm. Each cutting roll has a separate drive, each of which comprises a drive motor, a drive shaft and a driven shaft being driven via a bevel gear gearing. ... | 11/22/1988 |
| 4783984 | Apparatus for folding a sheet metal element Apparatus for folding a sheet metal element comprises a frame, two carriers carried by the frame, and two gripping platens which are secured to respective ones of the carriers and at least one of which is movable in unison with the associated carrier tran... | 11/15/1988 |
| 4779466 | Method and apparatus for continuously taking a hot gas sample to be analyzed from a reaction chamber In order to ensure that a sample can be taken continuously from a reaction chamber with a minimum of maintenance work, the sample gas is extracted from the reaction chamber in two identical extraction lines in alternation and at a rate which exceeds the r... | 10/25/1988 |
| 4778221 | Movable device for openpit mining A movable device (1) for openpit mining has a plurality of excavating hammers (11) on a cantilever boom (2) being swivellable in height direction. For facilitating the continuous excavating work and for providing an adaptability to the varying angles of i... | 10/18/1988 |
| 4775134 | Arrangement for preheating scrap An arrangement for preheating scrap includes a scrap treating furnace into which at least one exhaust gas duct from a metallurgical furnace enters. In order to attain a higher efficiency in preheating, the scrap treating furnace has a through chamber for ... | 10/04/1988 |
| 4770469 | Process for controlling the movement of a universally swivellable cutting arm of a partial cut cutting machine as well as apparatus for performing this process A method and apparatus for controlling the movement of a universally swivellable cutting arm of a partial cut cutting machine of the kind including a first hydraulic drive for lifting and lowering the cutting arm in order to preselect the depth of cut and... | 09/13/1988 |
| 4765171 | Apparatus for flanging sheet metal blanks An apparatus for flanging sheet metal blanks comprises a holding-down ram (4), which is provided with a holding-down shoe (5), that is composed of a plurality of segments, which are arranged in a row and comprise a mid-segment (7) and at each end of the m... | 08/23/1988 |
| 4764208 | Method of igniting a plasma arc as well as an arrangement for carrying out the method An auxiliary plasma arc fed by an auxiliary circuit serves for igniting a plasma arc, fed by a main circuit, of a plasma burner provided in a metallurgical furnace vessel. To increase the service lives of the burners, the electrode of the plasma burner an... | 08/16/1988 |
| 4761985 | Apparatus for flanging sheet metal blanks In apparatus for flanging sheet metal blanks, a holding-down mechanism comprises a holding-down ram (3) and a holding-down shoe (4), which comprises a plurality of displaceable segments (6), which are mounted on said ram for a displacement along a track, ... | 08/09/1988 |
| 4763337 | Process for melting particulate material In order to melt particulate material in an electric furnace with the help of at least one electric arc burning between a burner electrode arranged in the lid of the furnace and a bottom electrode arranged in the bottom of the furnace, the material is int... | 08/09/1988 |
| 4758049 | Apparatus for the underground operation of a movable mining machine In a mining machine (1) designed for underground operation, for example for cutting coal seams, and being equipped with a removal conveyor means taking up the heap of debris in front of the mine face and transferring this heap of debris to a removal conve... | 07/19/1988 |
| 4756200 | Probe for extracting hot sample gas A probe for extracting a hot gas sample comprises an inner tube for conducting the hot gas sample and a cooling jacket surrounding the inner tube. A heating element surrounds the inner tube and the heated inner tube is shielded from the cooling jacket by ... | 07/12/1988 |
| 4747729 | Movable trestle The invention refers to a movable trestle of approximately rectangular horizontal projection and serving the purpose of supporting the roof in underground cavities in particular serving the purpose of securing the excavation edge when recovering pillars i... | 05/31/1988 |
| 4747730 | Trestle being displaceable on caterpillar The invention refers to a trestle (1) being displaceable on caterpillars (2) and having an approximately rectangular cross section and serving the purpose of supporting the roof in underground cavities, in particular serving the purpose of securing the ex... | 05/31/1988 |
| 4744546 | Flushing arrangement for a metallurgical vessel A flushing arrangement for a metallurgical vessel having a metal outer shell, a bottom lined with a permanent lining, on which adjacently arranged refractory bricks are applied as working lining, and pipes inserted in recesses of the bricks at predetermin... | 05/17/1988 |
| 4744431 | Endless tread chassis for full-track vehicles The caterpillar chassis of a mining machine or loading machine has rocker arms 7, 9 being swivellably linked on a caterpillar carrier 2 and having rotatably supported thereon running rollers 8. At least one bearing bracket 5 for the swivel axis 6 of the r... | 05/17/1988 |
| 4741837 | Process for drying brown coal of high water content For the purpose of increasing the efficiency during drying of brown coals having a high water content and for the purpose of facilitating the purification of process waste water resulting in a drying process according to Fleissner it is proposed to spray ... | 05/03/1988 |
| 4740989 | Plant for producing steel from scrap A plant for the production of steel from scrap and optionally fluxes includes a shaft furnace section having a bottom to receive a liquid sump of premelt and heating means laterally entering into the lower part of its interior. A hearth type furnace secti... | 04/26/1988 |
| 4738930 | Apparatus for continuously recovering ethanol from fermentable sugar solutions Apparatus for continously producing ethanol from fermentable sugar solutions comprises horizontal, tubular mixing and separating vessel having internal rotating plates inclined relative to the horizontal axis of rotation. The yeast charged to the vessel i... | 04/19/1988 |
| 4735458 | Device for intermittently subjecting axially shiftable bits of a cutting head to the action of pressurized fluids The device for intermittently subjecting axially shiftable bits of a cutting head to the action of pressurized fluids comprises bit holders in which the bits are supported for a limited movement in axial direction. The bits are subjected to the action of ... | 04/05/1988 |
| 4734193 | Apparatus for continuously separating liquid phases of different density The apparatus for continuously separating liquid phases of different density consists of a separating basin (1) within which are arranged partition walls (5) for being lifted and lowered and for being moved one in direction to the other or for being swive... | 03/29/1988 |
