Patents by Inventor Klaus Drefahl
Klaus Drefahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6854356Abstract: The steering wheel for motor vehicles has a hub, a steering wheel rim and a plurality of spokes connecting the steering wheel rim with the hub. The hub comprises a hub core for fastening to a steering shaft and a base body which surrounds the hub core and is made of a fiber-reinforced plastic material. The spokes are integrally and continuously molded with the base body of the hub from a fiber-reinforced plastic material. The steering wheel rim is integrally and continuously molded with the spokes from a fiber-reinforced plastic material. In this arrangement, the base body together with the spokes and the steering wheel rim forms a self-supporting shaped body.Type: GrantFiled: January 10, 2003Date of Patent: February 15, 2005Assignee: TRW Automotive Safety Systems GmbHInventor: Klaus Drefahl
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Patent number: 6682682Abstract: The steering wheel for motor vehicles has a hub, a steering wheel rim and a plurality of spokes connecting the steering wheel rim with the hub. The hub comprises a hub core for fastening to a steering shaft and a base body which surrounds the hub core and is made of a fiber-reinforced plastic material. The spokes are integrally and continuously molded with the base body of the hub from a fiber-reinforced plastic material. The steering wheel rim is integrally and continuously molded with the spokes from a fiber-reinforced plastic material. In this arrangement, the base body together with the spokes and the steering wheel rim forms a self-supporting shaped body.Type: GrantFiled: January 10, 2003Date of Patent: January 27, 2004Assignee: TRW Automotive Safety Systems GmbH & Co. KGInventor: Klaus Drefahl
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Publication number: 20030101842Abstract: The steering wheel for motor vehicles has a hub, a steering wheel rim and a plurality of spokes connecting the steering wheel rim with the hub. The hub comprises a hub core for fastening to a steering shaft and a base body which surrounds the hub core and is made of a fiber-reinforced plastic material. The spokes are integrally and continuously molded with the base body. of the hub from a fiber-reinforced plastic material. The steering wheel rim is integrally and continuously molded with the spokes from a fiber-reinforced plastic material. In this arrangement, the base body together with the spokes and the steering wheel rim forms a self-supporting shaped body.Type: ApplicationFiled: January 10, 2003Publication date: June 5, 2003Applicant: TRW AutomotiveSafety Systems GmbH& Co. KGInventor: Klaus Drefahl
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Publication number: 20030101841Abstract: The steering wheel for motor vehicles has a hub, a steering wheel rim and a plurality of spokes connecting the steering wheel rim with the hub. The hub comprises a hub core for fastening to a steering shaft and a base body which surrounds the hub core and is made of a fiber-reinforced plastic material. The spokes are integrally and continuously molded with the base body of the hub from a fiber-reinforced plastic material. The steering wheel rim is integrally and continuously molded with the spokes from a fiber-reinforced plastic material. In this arrangement, the base body together with the spokes and the steering wheel rim forms a self-supporting shaped body.Type: ApplicationFiled: January 10, 2003Publication date: June 5, 2003Applicant: TRW AutomotiveSafety Systems GmbH & Co. KGInventor: Klaus Drefahl
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Patent number: 6561059Abstract: The steering wheel for motor vehicles has a hub, a steering wheel rim and a plurality of spokes connecting the steering wheel rim with the hub. The hub comprises a hub core for fastening to a steering shaft and a base body which surrounds the hub core and is made of a fiber-reinforced plastic material. The spokes are integrally and continuously molded with the base body of the hub from a fiber-reinforced plastic material. The steering wheel rim is integrally and continuously molded with the spokes from a fiber-reinforced plastic material. In this arrangement, the base body together with the spokes and the steering wheel rim forms a self-supporting shaped body.Type: GrantFiled: September 19, 2000Date of Patent: May 13, 2003Assignee: TRW Automotive Safety Systems GmbH & Co. KGInventor: Klaus Drefahl
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Publication number: 20020100342Abstract: The invention relates to a vehicle steering wheel comprising a skeleton made of die cast material, a reinforcement being embedded in the die cast material.Type: ApplicationFiled: January 23, 2002Publication date: August 1, 2002Applicant: TRW Automotive Safety Systems GmbH & Co. KGInventors: Klaus Drefahl, Jupp Fleckenstein, Martin Kreuzer
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Patent number: 5988014Abstract: A steering-wheel skeleton has a hub, spokes, and a rim made in one piece out of a single sheet-metal blank and provided with its final shape by separation and bending without machining. The hub is provided with a cone facing the vehicle. The spokes, which extend up and out, are provided with unthreaded bores, cutouts, or threaded bore for attaching an airbag module. A nut can, if necessary, be forced into one cutout. The hub can be reinforced by using two layers of the material.Type: GrantFiled: June 13, 1997Date of Patent: November 23, 1999Assignee: TRW Automotive Safety Systems GmbHInventors: Udo Liesenfeld, Klaus Drefahl, Martin Kreuzer, Peter Hartmann, Heribert Werner
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Patent number: 5957003Abstract: An armature for a motor-vehicle steering wheel. The hub, spokes, and rim are at least partly made out of a single sheet of metal. The metal is folded at the edge to produce a cross-section in the form of a U or L. The base of the section is essentially perpendicular to the axis of the steering wheel. The sides of the section essentially parallel that axis. The sides of the U or L are provided with an undulation as viewed longitudinally, that is almost non-existent in the vicinity of the base, and that increases continuously to a maximum as it approaches the edge.Type: GrantFiled: July 31, 1997Date of Patent: September 28, 1999Assignee: MST Automotive GmbHInventors: Klaus Drefahl, Martin Kreuzer
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Patent number: 5672181Abstract: A method for manufacturing a hardened lead storage battery electrode wherein fine, particulate solids, that are insoluble in lead, are incorporated into a lead matrix. The method includes the steps of incorporating solids, dissolved or suspended in an electrolyte, into a lead matrix such that shaping simultaneously occurs during the deposition of lead due to a suitable fashioning of a plurality of electrically conductive surface regions; vigorously agitating the electrolyte by introducing air through an apertured plate in the bottom of an electrolyte vessel providing an electro-chemical cell including a cathode and a Cu/Ta/Pt anode and an electrolyte solution including HBF.sub.4 and an electrolyte selected from PbO, Pb(OH).sub.2 and PbCO.sub.3 or including a graphite anode and an electrolyte solution of Fe(BF.sub.4).sub.2 and Fe(BF.sub.4).sub.3. The electrolyte is prepared from a raw material selected from lead, waste material containing lead and desulfured lead storage battery electrolyte paste.Type: GrantFiled: April 22, 1996Date of Patent: September 30, 1997Assignee: Hans WarlimontInventors: Hans Warlimont, Marco Olper, Armin Ueberschaer, Klaus Drefahl
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Patent number: 5097720Abstract: In order to have a sufficiently large elongation at fracture in conjunction with high strength values, a pressure-diecast steering wheel skeleton consists of an aluminum alloy which is composed of______________________________________ 2.5 to 3.5 % by weight magnesium 0.10 to 0.30 % by weight silicon 0.40 to 0.60 % by weight iron 0.25 to 0.45 % by weight manganese 0.015 to 0.05 % by weight copper 0.035 to 0.085 % by weight zinc balance aluminum.Type: GrantFiled: August 10, 1990Date of Patent: March 24, 1992Assignee: Kolbenschmidt AktiengesellschaftInventor: Klaus Drefahl
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Patent number: 5040646Abstract: A component which is to be installed for an absorption of energy with an ideal displacement-compressive force characteristic consists of a prismatic straight metal rod, which is long relative to its transverse dimensions and is adapted to inelastically buckle in the direction of the axis of its larger principal moment of inertia under an axially acting compressive load and is provided with spur teeth, which extend transversely to the longitudinal direction and are provided on at least one of the broadsides, which extend at right angles to the axis of the larger principal moment of inertia.Type: GrantFiled: November 13, 1989Date of Patent: August 20, 1991Assignee: Kolbenschmidt AktiengesellschaftInventor: Klaus Drefahl
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Patent number: 5005863Abstract: An installable component which serves to absorb energy and is intended to be used with steering wheels of motor vehicles having a steering wheel hub which is recessed from the rim of the steering wheel consists of a plurality of deformable metal rods, which have parallel axes and are arranged in a circle and at each end are firmly interconnected by a metal flange. In order to improve the energy absorption performance the metal rods are adapted to buckle in the direction of the larger principal moment of inertia under an axially acting pressure force, and at least one of the broadsides, which extend at right angles to the axis of the larger principal moment of inertia and include a right angle with the radius of the installable component, is provided with spur teeth, which extend transversely to the longitudinal direction.Type: GrantFiled: November 13, 1989Date of Patent: April 9, 1991Assignee: Kolbenschmidt AktiengesellschaftInventor: Klaus Drefahl
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Patent number: 4332294Abstract: A heat exchanger for the cooling of a gas, especially a gas containing SO.sub.2, comprises a tube bundle whose tubes, composed of lead, bridge a pair of tube sheets and can be provided with internal longitudinal ribs. According to the disclosure, the extruded cylindrical tubes are reshaped by indentations in a direction transverse to the longitudinal axis. The indentations may be annular or staggered.Type: GrantFiled: April 4, 1979Date of Patent: June 1, 1982Assignee: Metallgesellschaft AktiengesellschaftInventors: Klaus Drefahl, Helmut Gilles