Patents Assigned to Benteler Werke AG
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Patent number: 4817696Abstract: Disclosed is a rubber pneumatic tire for vehicles which has two beads for bearing against the rim of a wheel. Embedded in each bead is a core ring which has a shaped ring and around which a carcass insert which is embedded into the rubber material of the tire is laid, for anchoring same. Each shaped ring comprises a material which chemically bonds to the rubber material, and contains a winding of high-strength fibres, which is laid in the shaped ring and which holds together and strengthens the shaped ring.Type: GrantFiled: April 30, 1987Date of Patent: April 4, 1989Assignees: Benteler-Werke AG, Jonny JanusInventors: Jonny Janus, Gert Vaubel, Stefan Klatzer, Gunter Beckmann
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Patent number: 4730420Abstract: A drilling machine for drilling holes in glass panes includes an annular support and an annular pressing member aligned opposite each other along a path of movement of the drill bit. The support and the pressing member are swingably mounted relative to the axis of the drill bit and are made preferably as inner rings of a ball and socket joint.Type: GrantFiled: January 31, 1986Date of Patent: March 15, 1988Assignee: Benteler-Werke AGInventors: Herbert Stratmann, Joachim Korswird, Uwe Werner
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Patent number: 4640115Abstract: In order to increase output of pipe straightening devices, there is provided a driving unit between a preparatory station for the pipes and a feeding station which advances the pipes from the preparatory station in axial direction one after the other in the feeding station. The feeding station includes a succession of rotation symmetrical guiding elements supported for rotation about axes which extend parallel to the feeding path for the pipes. The guiding bodies prevent striking of unbalanced pipes against the feeding unit and permit axial feeding of the pipes in a straightening station.Type: GrantFiled: July 3, 1985Date of Patent: February 3, 1987Assignee: Benteler-Werke AGInventors: Franz-Josef Hartmann, Heinz Hefendehl
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Patent number: 4594814Abstract: Chamfering of one or two edges of a glass disk is performed by one or two peripheral grinding wheels which move relative to the glass disk and rotate about axes of rotation which are parallel to the edges to be chamfered.Type: GrantFiled: August 7, 1985Date of Patent: June 17, 1986Assignee: Benteler-Werke AGInventors: Egon Olszewski, Klaus-Dieter Schaper, Uwe Werner
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Patent number: 4566523Abstract: An adjustable slide mold for twin casting installations includes two angular mold parts slidably engaging each other at two contact surfaces. At least one of the mold parts is formed with a projecting arm engaging the opposite mold part at an additional contact surface to divide the extrusion channel into a plurality of parallel extrusion passages. The mold parts are connected to an adjusting drive which uniformly displaces the mold parts relative to each other in opposite directions, so that the centers of respective extrusion passages remain stationary irrespective of the adjustment of their cross-sectional areas.Type: GrantFiled: June 3, 1983Date of Patent: January 28, 1986Assignee: Benteler-Werke AG Werk NeuhausInventor: Gert Vaubel
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Patent number: 4563802Abstract: A method for the continuous production of exhaust pipes for automotive vehicles comprises the steps of continuously withdrawing an elongated substantially flat metal strip from a coil and subsequently bending and forming the moving strip into a longitudinally slitted tube strand. The opposite faces of the slitted pipe strand are then welded together and subsequently the pipe strand, while still moving, is severed into pipe sections of predetermined length and the pipe sections are then transferred to at least one bending apparatus for bending the pipe sections into exhaust pipes with predetermined bends; and an apparatus for carrying out the above method.Type: GrantFiled: May 6, 1980Date of Patent: January 14, 1986Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Egon Olszewski
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Patent number: 4563766Abstract: An electric arc furnace for melting metal, especially steel, includes a container having an upper open ended substantially cylindrical wall portion and a lower cylindrical wall portion extending downwardly therefrom and being closed at the bottom and receiving during operation of the furnace a bath of molten material having an upper level at a predetermined maximum elevation above the bottom of the container. The container includes an outer metal shell and refractory material covering at least the lower wall portion of the shell and the closed bottom. In order to increase the charging volume of the container without essentially changing the height thereof, the upper wall portion has, at a distance of at least 300 mm above the level the bath of molten metal, an inner diameter which is greater than the outer diameter of the metal shell of the lower wall portion.Type: GrantFiled: October 9, 1979Date of Patent: January 7, 1986Assignee: Benteler-Werke AGInventors: Klaus Bick, Lothar Harmsen, Wilhelm Lachenmayer, Jurgen Zieschang
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Patent number: 4483647Abstract: An arrangement for performing machining operations at the end faces of pipes includes a tool holder which is equipped with respective tools and is mounted at least for rotation on a carrier. The carrier is mounted on the machine frame for movement normal to the axis of the pipe which is clamped in a clamping device mounted on the machine frame, such that the axis of the pipe extends parallel to the axis of the tool holder. The tool holder has a central passage in which there is guided a spindle having a tapering end portion close to the pipe. A cylinder-and-piston unit pushes the spindle out of the passage and into the interior of the pipe so that the tapering end portion of the spindle becomes coaxially nested in the open end of the pipe, its axis and thus the axis of the tool holder then coinciding with the axis of the inner surface of the pipe. The carrier is then arrested in this working position by a pair of clamping devices, and the spindle is retracted into the passage.Type: GrantFiled: June 11, 1982Date of Patent: November 20, 1984Assignee: Benteler-Werke AGInventors: Johannes Gardian, Wilhelm Beine
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Patent number: 4480976Abstract: Disclosed is an adjustable sliding mold assembled of two angular mold pieces slidably engaging each other at two mating surfaces. Adjusting means, preferably in the form of a spindle, is hinged to an outer side of a mold part to move the same transversely to the extrusion channel. The movable mold part is formed with an arcuate guide surface extending transversely to the extrusion channel and cooperating with a stationary complementary bearing surface so that during adjustment of the width of the extrusion channel the guiding surface automatically adjusts the taper of the channel.Type: GrantFiled: March 1, 1983Date of Patent: November 6, 1984Assignee: Benteler-Werke AGInventors: Gert Vaubel, Heinz Beier
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Patent number: 4351055Abstract: A water cooled wall element for at least partially replacing the casing of refractory material in melting furnaces, especially electric arc furnaces for melting steel, above the bath of molten material in the furnace comprises a plurality of parallel, horizontally extending and vertically superimposed tubes abutting against each other, a cooling water inlet connected to the lowermost of the superimposed tubes, a cooling water outlet connected to the uppermost tube, and return bends connecting the ends of proximal tubes to each other so that the cooling water will flow from the cooling water inlet through the plurality of superimposed tubes to the cooling water outlet, wherein elongated substantially uninterrupted protrusions are provided on each of the tubes and extending in the longitudinal direction thereof on that surface of the wall element which is directed toward the interior of the surface to increase adhesion of an insulating layer of refractory material to be applied to the inner surface of the wallType: GrantFiled: March 24, 1980Date of Patent: September 21, 1982Assignee: Benteler Werke AGInventors: Klaus Bick, Lothar Harmsen, Jurgen Zieschang, Friedhelm Vennmann
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Patent number: 4331015Abstract: A tube bending machine comprises a tube bending mechanism per se for bending a front portion of a tube inserted therein and fluid operated units for moving a mandrel in axial direction into the tube to be bent and for withdrawing the mandrel through a rear end of the tube after bending. A tube magazine is located to one side of the bending mechanism and a tube depositing station for receiving the bent tube is located at the other side thereof.Type: GrantFiled: March 3, 1980Date of Patent: May 25, 1982Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Wolfgang Streubel, Egon Olszewski
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Patent number: 4325268Abstract: A safety steering column assembly for automobiles comprising a steering shaft of variable axial length for connecting a steering wheel with a steering gear mechanism. A portion of the steering shaft adjacent the steering wheel is surrounded by a guide and support tube in which a bearing for turnably supporting the steering shaft is mounted. The guide and support tube, in turn, is surrounded by a corrugated tube serving as an impact absorber in which the corrugations of the tube are compressed into a block to reduce the axial length thereof.Type: GrantFiled: March 18, 1980Date of Patent: April 20, 1982Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Rainer Hansen, Egon Olszewski, Ferdinand Wecker
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Patent number: 4319471Abstract: Apparatus for forming a corrugated tube from a smooth walled starting tube comprises a pair of receiving mandrels aligned spaced from each other along a preferably vertical axis and movable toward and away from each other to be engaged in opposite end portions of a starting tube. The halves of split corrugation forming discs and the halves of an end member above the uppermost of the discs, coupled together for limited movement in axial direction, are respectively carried and guided for movement in axial direction by a pair of clamping jaws tiltable between an open position permitting to align a starting tube with the mandrels and a closed position closing the split discs and the split end member and fluid tightly clamping opposite end portions of the starting tube located about said mandrels respectively between one of the mandrels and the closed end member and between the other mandrel and the clamping jaws.Type: GrantFiled: June 20, 1980Date of Patent: March 16, 1982Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Rainer Hansen, Egon Olszewski, Ferdinand Wecker
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Patent number: 4275258Abstract: A box-shaped shallow, water-cooled element of steel plate for the construction of a wall portion of a melting furnace above the melt in the furnace, has a front wall adapted to face the interior of said furnace. This front wall is provided with a plurality of recesses of equal cross-section equally spaced from each other in the form of elongated grooves or bores to facilitate adhesion of a layer of refractory material to be applied thereto, wherein the recesses are machined in the surface of the front wall adapted to be directed to the interior of the furnace in such a manner that the area of recesses at this surface is smaller than the area of the remaining non-machined surface to thus enhance heat conduction from the interior of the furnace to the cooling water passing through the wall element and to prevent damage of the front wall when the protective layer is missing completely or in part.Type: GrantFiled: May 31, 1979Date of Patent: June 23, 1981Assignee: Benteler-Werke AGInventors: Lothar Harmsen, Klaus Bick, Wilhelm Lachenmayer, Friedhelm Vennmann, Jurgen Zieschang
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Patent number: 4267718Abstract: Apparatus for producing a tube with successive corrugations of different configuration from a tubular blank of uniform diameter mainly comprises a central pin having a shaft portion fixed only at one end to a stationary support and having at the other end a radially enlarged head portion cooperating with radially inwardly movable clamping and forming jaws to clamp a portion of a tubular blank therebetween. The apparatus includes further a tubular member guided on the shaft portion of the central pin and movable in axial direction by hydraulically operated members cooperating therewith.Type: GrantFiled: June 22, 1979Date of Patent: May 19, 1981Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Egon Olszewski, Rainer Hansen, Ferdinand Wecker
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Patent number: 4237713Abstract: Apparatus for producing a tube with successive corrugations from a tubular blank of constant diameter comprises a central pin having a shaft portion fixed only at one end to a stationary support and having at the other end a radially enlarged head portion cooperating with radially inwardly moving clamping and forming jaws to clamp a portion of a tubular blank therebetween. The apparatus includes further a tubular member guided on the shaft portion of the central pin and movable in axial direction by hydraulically operated members connected thereto.Type: GrantFiled: May 18, 1979Date of Patent: December 9, 1980Assignee: Benteler-Werke AGInventors: Hubertus Benteler, Egon Olszewski, Rainer Hansen, Ferdinand Wecker
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Patent number: 4139932Abstract: A method for forming cooling coils of successive layers of rectangular configuration, in which the front end of an elongated tube is threaded between rolls of a straightening apparatus and clamped onto the periphery of a rectangular table, whereafter the table is rotated about a central axis while the incoming tube shifted in direction of this axis, and while the tube upstream of the table is held in taught condition by the straightening apparatus so that the tube is wound into a coil of rectangular configuration about the table. After a coil of predetermined length has thus been wound, the table is stopped, the tube cut between the straightening apparatus and the table and the cut rear end of the tube is also clamped to the table.Type: GrantFiled: January 24, 1978Date of Patent: February 20, 1979Assignee: Benteler-Werke AGInventors: Eckehard Hanert, Anton Ehlen
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Patent number: 4135380Abstract: An apparatus for manufacturing elongated curved tubular elements sequentially clamps longitudinally spaced end portions of a straight elongated tubular section, confines a central portion of the tubular section intermediate the clamped end portions between two dies, applies forces to at least one of the dies to displace the same and thus also the central portion of the tubular section in a predetermined direction and to a given extent with respect to the clamped end portions so that substantially S-shaped transitory portions of deformed cross-sectional shapes develop between the clamped end portions and the central portion of the tubular section, and restores the cross-sectional shapes of the transitory portions preparatory to sequential retraction of the dies and unclamping of the end portions of the tubular section by means of at least one mandrel which is introducible into the tubular section through at least one of the end portions thereof for passage into and through at least one of the transitory portioType: GrantFiled: September 22, 1977Date of Patent: January 23, 1979Assignee: Benteler-Werke AGInventors: Egon Olszewski, Eckehard Hanert
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Patent number: 4009066Abstract: The opposite ends of at least one pair of tubular members, for instance steel tubes, are closed by inserts which have radial portions overlying end faces about the open ends of the tubular members. The tubular members are then axially aligned with each other while maintaining the radial portions of the inserts spaced from each other, whereafter the tubular members and the spacing therebetween are covered with a jacket of plastic material. Subsequently thereto, the jacket is severed intermediate the annular portions of the inserts to thereby obtain two discrete tubular elements.Type: GrantFiled: July 27, 1973Date of Patent: February 22, 1977Assignee: Benteler Werke AGInventor: Wilhelm Lachenmayer