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| Number | Title | Issue Date |
| 4404893 | Hydraulic mine prop A hydraulic mine prop includes an inner piston-like prop guided within an outer cylinder-like prop, and a roof fall valve. The interior space of said inner prop communicates freely with the working chamber of the prop, and the roof fall valve is arranged ... | 09/20/1983 |
| 4263005 | Device for provisionally consolidating a gallery and suitable consolidating frame The invention refers to a device with which provisional consolidating frames adapted to be brought to a smaller size can be transported to the drift face and can be put in place. According to the invention this device is arranged on the cutting machine it... | 04/21/1981 |
| 4261617 | Method of controlling the working motion of a cutting tool of a tunnel-driving machine over the breast, and apparatus for carrying out the method A method of controlling the working motion of a cutting tool of a tunnel-driving machine over the breast, wherein the actual position of the cutting tool is ascertained in consideration of the position of the tunnel-driving machine relative to the desired... | 04/14/1981 |
| 4254167 | Process of treating sponge iron for protection against reoxidation and apparatus for carrying out the process A process for treating sponge iron to protect it against reoxidation and/or corrosion during storage and transit comprising the steps of tumbling sponge iron which is in particle form with a pre-prepared blend of caustic lime powder and an adhesion promot... | 03/03/1981 |
| 4236627 | Cutting machine A cutting machine includes an endless conveyor and a loading ramp having movable loading arms which continuously shift the cut material in an upward direction of the loading ramp to conveyor. The rear deflector wheel of the conveyor is driven by a squirre... | 12/02/1980 |
| 4225144 | Device for sealing the gap between component parts rotatable relative to each other A device for preventing penetration of dust from the outside inwardly into an annular gap between a cutter arm of a cutting machine and a rotatable cutting head carried on said arm, said cutting head having an interior space containing lubricating oil, sa... | 09/30/1980 |
| 4197035 | Shield-carrying roof support unit It is an object of the invention to provide an improved shield-carrying roof support unit which has a linkage for adjusting the elevation of the cap while the pivotal connection between the cap and the shield is constrained to move substantially at right ... | 04/08/1980 |
| 4193778 | Device for removing dust-shaped particles from an air stream serving for the ventilation of mines A gas scrubber having an air inlet and an air exit, said scrubber comprising: a plurality of venturi tubes having upstream ends and downstream ends, the venturi tubes being arranged parallel to each other; a centrifugal separator in communication with the... | 03/18/1980 |
| 4191504 | Duct-mounted turbine and method of installing the same An annular inner vane cover is axially spaced from a rotatably mounted runner and has first and second flanges. An annular water guide is disposed between said runner and said inner vane cover and has a third flange, which is jointed to said first flange.... | 03/04/1980 |
| 4188069 | Mining machine having walk-on platform on cutter arm In a cutting machine having a cutter arm which is mounted at one end for universal pivotal movement and which carries at its free end a cutting tool: a walk-on platform covering at least part of the cutter arm, said platform being box-shaped in cross-sect... | 02/12/1980 |
| 4186971 | Device for cooling cutting teeth of cutter heads of cutting machines In a rock cutting machine which includes a cutter arm having an inner end and an outer end carrying a toothed cutter which rotates about an axis transverse to the longitudinal dimension of the arm, an improved cooling device for the cutting teeth of the c... | 02/05/1980 |
| 4175227 | Process for automatically vertically butt welding steel sheet material for containers Chemically resistant steels for containers are butt welded by using an automatic welding process. The electrode is oscillated over the whole width of the seam and is kept to a maximum thickness of 1 mm.... | 11/20/1979 |
| 4169745 | Method of joining frogs of wear-resisting manganese steel castings to rails of carbon steel A method of joining frogs consisting of wear-resisting austenitic manganese steel casting to rails of carbon steel by welding and with the aid of an interposed connector consisting of austenitic low-carbon steel, characterized in that the connector is fir... | 10/02/1979 |
| 4168817 | Rail switch A rail switch in which two wing rails are engageable with a frog in alternation, characterized in that guide members are provided, which are held in position relative to the wing rails and extend under and are engageable with the frog or parts rigidly con... | 09/25/1979 |
| 4167998 | Arrangement for tensioning a gateway conveyor in a sloping gateway An arrangement for tensioning a gateway conveyor in a sloping gateway during longwall working using supports having base frames which are provided with pulling and shifting hydraulic actuators, wherein in a tensioning device is provided at least at one of... | 09/18/1979 |
| 4162104 | Cutting machine A cutting machine having a universally movable cutting arm provided with a plurality of cutting heads in which the cutting machine's oil reservoir is mounted within the cutting arm and cooled by the water cooling system for the cutting machine's motor. Th... | 07/24/1979 |
| 4159746 | Bit of circular cross-section A cutting bit includes a bit tip and a shaft having a portion tapered toward the tip and having a reduced diameter between the tapered portion and the portion intended to be inserted in a holder. The bit tip has the shape of a body of revolution with conv... | 07/03/1979 |
| 4159090 | Railway switch for vignoles rails Railway switch for Vignoles rails, comprising a frog tip and a pair of wing rails arranged for swivelling movement, one of said wing rails engaging the frog tip in its end position and being supported in this position in direction of engaging the frog tip... | 06/26/1979 |
| 4157773 | Grease gun A grease gun comprising a hollow piston rod driven by a pressure fluid upon an annular drive piston at one end of the rod, compressing a supply of grease by an annular plunger at the other end of the rod into a receiving chamber within the piston rod, whi... | 06/12/1979 |
| 4152126 | Equipment for removing dust particles from an air stream Apparatus for removing dust particles from an air stream includes a tubular housing having an inlet end and an outlet end; a plurality of Venturi tubes having open inflow ends and open outflow ends supported side-by-side within the housing, with their axe... | 05/01/1979 |
| 4147391 | Swivel mechanism for kerf-cutting machines A swivel mechanism for kerf-cutting machines comprising a cutter arm, which carries the cutting tool, in which mechanism the cutter arm is pivoted to a swivel head on a horizontal axis for a vertical angular movement, said swivel head is pivoted on an app... | 04/03/1979 |
| 4147532 | Process for piloting or controlling a steel refining process In a steel refining process control over the composition of the product is maintained in part by supplying blowing oxygen to the molten material in an amount predetermined for achieving FeO content which is required for slagging the manganese and phosphor... | 04/03/1979 |
| 4145197 | Impeller for separating dust particles from an air stream A device for separating dust particles from an air stream, in particular for mine ventilation, comprising a centrifugal separator, a blower for conveying the air stream through the centrifugal separator, and a device connected in advance of the centrifuga... | 03/20/1979 |
| 4144442 | Process for producing a component part of a railway switch or a railway crossing and component part of railway switches or railway crossings produced by such process Process for producing a component part of a railway switch or of a railway crossing in which frogs consisting of austenitic manganese steel casting are, with interposition of an intermediate piece, connected by a welding operation with rails consisting of... | 03/13/1979 |
| 4120406 | Apparatus for forming a stack composed of layers of round-section elongated items Rods or tubes are arranged in a first plurality of layers in which their number increases by one from layer to layer, and in a succeeding plurality of layers wherein they similarly decrease in number. A stack support can be lowered from an uppermost eleva... | 10/17/1978 |
| 4111488 | Method for cutting minerals and cutting machine In a method and apparatus for cutting minerals utilizing a cutting tool provided with cutting teeth, the tool rotates about an axis approximately parallel to the winning face and is moved at a feeding rate essentially in axial direction. Several grooves s... | 09/05/1978 |
| 4111227 | Pressure relief valve for hydraulic mine supporting elements A pressure relief valve for hydraulic mine supporting elements, particularly mine props, has a valve member loaded in its closing direction by a spring, a piston is connected to the valve member end sealingly sliding within a cylinder of the valve housing... | 09/05/1978 |
| 4098497 | Medium-conduit-system to be used in tiltable-metallurgical-vessel-arrangement A medium-conduit-system for use in a tiltable-metallurgical-vessel-arrangement of the type including a carrying ring for the vessel, tilting trunnions on the carrying ring and base-supported bearings for the tilting trunnions, wherein at least one of ... | 07/04/1978 |
| 4098322 | Starter bar to be used in continuous casting plants A starter bar to be used in continuous casting plants for extracting cast strands has a starter bar head and articulately interconnected link bodies following upon the starter bar head, and at least one of these link bodies is divided between the joints c... | 07/04/1978 |
| 4098539 | Cutting machine A cutting machine has at each side of a universally pivotable cutter boom a cutting head which is rotatably supported around an axis extending vertically to the longitudinal direction of the cutter boom and which is advanced in direction of its axis when ... | 07/04/1978 |
| 4094418 | Apparatus for simultaneously pivoting, tilting and rotating a lining brick An apparatus for simultaneously pivoting, tilting and rotating a lining brick, in particular a converter lining brick having a trapezoidal cross-section, into a position adequate for stacking has a stationary supporting stand, a carrying arm journaled on ... | 06/13/1978 |
| 4091692 | Bit holder A bit holder consisting of steel, said bit holder comprising a bore for accommodating the bit shaft and being welded to the cutting head of a cutting machine, characterized in that the bit holder consists of a part of heat-resistant steel of high strength... | 05/30/1978 |
| 4087132 | Device for guying a movable cutting machine Device for guying a movable cutting machine, particularly a cutting machine provided with a caterpillar drive, in its operating position, and for moving this cutting machine in an ascending gallery being consolidated by means of supporting frames formed o... | 05/02/1978 |
| 4085793 | Plate mould having two tiltably adjustable end walls A plate mould with a rectangular cross-section for continuously casting steel slabs has end walls that are tiltably adjustable and two adjustment drives at each end wall and link plates connecting each end wall and its pertaining adjustment drives in a fo... | 04/25/1978 |
| 4086105 | Method of producing fine-grain sheet or fine-grain plate of austenitic steels In a method of producing fine-grain sheet or plate, in particular fine-grain plate with a thickness of more than 50 mm, of austenitic steels by hot rolling billets or slabs in a number of passes, the mean velocity of the reduction in thickness (v in mm/mi... | 04/25/1978 |
| 4079918 | Method for closing a tap hole of a metallurgical vessel and an arrangement therefor In a method of and apparatus for closing a tap hole of a metallurgical vessel for separating metal and slag compressed gas is introduced into the tap hole after the metal has been poured off, the gas being introduced in a direction contrary to the pouring... | 03/21/1978 |
| 4076317 | Device for guying a movable cutting machine Apparatus for guying a movable cutting machine equipped with a caterpillar drive and for moving the machine on ascending galleries has at both sides of the cutting machine tension members formed of chains or ropes and led over winches. The tension members... | 02/28/1978 |
| 4075856 | Device for consecutively supporting a drift Device for consecutively supporting a drift by means of caps and posts or props in dependence on face advancement, said device being designed for lifting and for pressing the caps to be positioned against the mine roof, characterized in that a breast fram... | 02/28/1978 |
| 4070883 | System and assembly for measuring the movement of strip and hot strip mill A roller shell is rotatably mounted on a non-rotatable axle having an axial bore and is engageable with moving strip. A detector is non-rotatably mounted on said axle and comprises a magnet which produces a magnetic field and a sensing coil arranged to ge... | 01/31/1978 |
| 4070063 | Dividing cutting machine A dividing cutting machine includes a cutter boom pivotable about a horizontal axis, at least one cutter head disposed on the cutter boom, a loader deck hingedly connected to the frame of the dividing cutting machine pivotable about a horizontal axis and ... | 01/24/1978 |
