Patents by Inventor Martin Lepper

Martin Lepper 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).

  • Patent number: 11014311
    Abstract: Disclosed are a connecting arrangement of a fiber composite component with a second component and a process for producing the arrangement. The second component comprises at least one flat section having one or more cut-outs which pass through the flat section. The flat section is arranged between at least two sublayers of the fiber composite component and at least one of the at least two sublayers with a layer thickness SF comprises one or more embossments which have an essentially even layer thickness SF and are molded into the one or more cut-outs.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: May 25, 2021
    Assignee: LEICHTBAU-ZENTRUM SACHSEN GMBH
    Inventors: Martin Lepper, Werner Hufenbach, Enrico Ladusch, Jens Werner, André Kiessling
  • Patent number: 10683907
    Abstract: The invention relates to a spring (1, 23) comprising at least one tensile body (2, 17, 71, 76) that can be subjected to tensile stress and/or at least one compressive body (37) that can be subjected to compressive stress, the spring also comprising a force-displacement conversion unit (3, 18, 24) for converting the force-displacement of the spring force F, said force-displacement conversion unit (3, 18, 24) having a moveable input control element (6, 19, 29), to which the spring force can be applied and a moveable output control element (7, 20, 30, 54, 60, 68, 72) which is operatively connected to the tensile body (2, 17, 71, 76) or to the compressive body (37) in such a way that the spring force F produces a tensile stress in the tensile body (2, 17, 71, 76) or a compressive stress in the compressive body (37) in a specific force-displacement conversion ratio.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: June 16, 2020
    Assignee: Leichtbau-Zentrum Sachsen GmbH
    Inventors: Werner Hufenbach, Martin Lepper, Jens Werner, Christian Koehler
  • Patent number: 10618231
    Abstract: A method for producing a structural element (14) that comprises a hollow profile (1) made of continuous fibre-reinforced plastics material and a load-application element (15) is based on providing a hollow profile (1) on a liner (2), wherein the hollow profile (1) is impregnated by heating it to a temperature that is equal to or above the softening temperature of the matrix material (9) and below its cross-linking temperature, removing the liner (2) in an inner region (17) of the hollow profile (1), where the load-application element (15) is arranged, and consolidating and functionalising the structural element (14) by heating it to a temperature that is equal to or above the cross-linking temperature of the matrix material (9) and by applying a radially inwardly acting pressure to the structural element (14). The hollow profile (1) is moulded onto the load-application element (15) in a form-fitting manner.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 14, 2020
    Assignee: Leichtbau-Zentrum Sachsen GmbH
    Inventors: Florian Lenz, Bernhard Witschel, Martin Lepper
  • Patent number: 10479031
    Abstract: The invention relates to a method and a device for infiltrating a fiber preform of a component of fiber composite material with a matrix material. On the method side, it is proposed that an elastic coating (3) is applied onto the fiber preform (1, 23, 37), wherein the elastic coating (3) is widened to form a gap space (22) between the fiber preform (1) and the coating (3). The matrix material (21) is then fed into the gap space (22) and the elastic coating (3) is subsequently pressed against the fiber preform (1, 23, 37). On the device side, it is claimed that an elastic coating (3) is arranged on the fiber preform (1, 23, 37) and means are provided, which are in operative connection with the elastic coating (3), by which the coating (3) can be widened while forming a gap space (22) between the fiber preform (1, 23, 37) and the coating (3). A matrix material (21) can be fed into the gap space (22) and the coating (3) can be pressed against the fiber preform (1, 23, 37).
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: November 19, 2019
    Assignees: THYSSENKRUPP FEDERN UND STABILISATOREN GMBH, THYSSENKRUPP AG
    Inventors: Werner Hufenbach, Martin Lepper, Jens Werner, Christian Koehler, André Bartsch
  • Patent number: 10427452
    Abstract: The invention relates to a wheel rim having a rim base (3) of fiber composite material and a wheel disk (2) connected to the rim base (3) in a radial marginal section. The radial marginal section of the wheel disk (2) comprises at least two partial layers (4, 5) on each of which a contoured joining zone (6, 7) which extends substantially axially is formed, the joining zone being flat connected to the rim base (3).
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 1, 2019
    Assignee: THYSSENKRUPP CARBON COMPONENTS GMBH
    Inventors: Werner Hufenbach, Martin Lepper, Jens Werner, Christian Koehler
  • Patent number: 10357902
    Abstract: One example method for producing a component from organic sheets may comprise placing a first organic sheet and a second organic sheet next to one another to form a component preform, forming at least one overlapping joining zone by tacking the first and second organic sheets together with a connecting part in the form of a third organic sheet, transferring the component preform to a joining tool, using the joining tool to form a joined component by connecting the organic sheets through melting and compression in the overlapping joining zone, and consolidating the joined component at least in the zone of the overlapping joining zone.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: July 23, 2019
    Assignee: THYSSENKRUPP STEEL EUROPE AG
    Inventors: Lothar Patberg, Stefan Mayer, Torsten Krahnert, Werner Hufenbach, Enrico Ladusch, Jens Werner, André Kießling, Alexander Herbig, Jörn Kiele, Martin Lepper
  • Publication number: 20190202147
    Abstract: The invention relates to a method for producing structural elements (14) that comprise a hollow profile (1) made of continuous fibre-reinforced plastics material that comprises a thermosetting matrix material that has a softening temperature that is below the cross-linking temperature, and at least one load-application element (15), and to a structural element (14) produced by the method and comprising a hollow profile (1) made of continuous fibre-reinforced plastics material that comprises a thermosetting matrix material that has a softening temperature that is below the cross-linking temperature, and at least one load-application element (15), the hollow profile (1) and the load-application element (15) being interconnected in a form-fitting manner. The method according to the invention comprises at least the following method steps: a.
    Type: Application
    Filed: January 23, 2017
    Publication date: July 4, 2019
    Inventors: Florian Lenz, Bernhard Witschel, Martin Lepper
  • Patent number: 10323710
    Abstract: A torsion spring may be formed as a bar spring or helical spring comprising a spring wire of fiber composite material. In some examples, the torsion spring comprises a number of layers of fiber reinforcement, which are impregnated with a matrix material. The layers may comprise tensile-loaded fibers and compression-loaded fibers. Groups of layers of the same loading direction may exist and, seen from an inside to an outside, the group stiffness of at least two groups may differ. Likewise, methods for making such torsion springs of fiber composite material are disclosed.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 18, 2019
    Assignees: THYSSENKRUPP FEDERN UND STABILISATOREN GMBH, THYSSENKRUPP AG
    Inventors: Werner Hufenbach, Jörn Kiele, Martin Lepper, Jens Werner
  • Patent number: 10266026
    Abstract: The invention relates to a device for introducing force into a component of fiber composite material by means of a screw connection having a bolt-like connecting element arranged in a passage of the component. The invention is based in particular on the problem of improving the durability of the screw connection on the component of fiber composite material. The object is achieved in that the screw connection has a two-part bush (6) which borders the passage (2) of the component (1) and accommodates the connecting element (9), wherein the first and the second bush part (6.1, 6.2) of the bush (6) are designed to engage in one another in axial extension, and each bush part (6.1, 6.2) has a radially extended union collar (15.1, 15.2) with a collar side (16.1, 16.2) facing the component (1), on which side a sliding surface is formed.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: April 23, 2019
    Assignee: LEICHTBAU-ZENTRUM SACHSEN GMBH
    Inventors: Werner Hufenbach, Martin Lepper, Jens Werner, Enrico Ladusch
  • Patent number: 10173461
    Abstract: A wheel with a rim as well as a wheel spider, where the wheel spider has a hub and spokes. The wheel includes spokes including one or more linearly stretched textile strands as reinforcement material of a fiber composite and each linearly stretched textile strand runs at least once from the rim to the hub and back without interruption and thus forms at least one spoke. The textile strands are connected in a positive-locking manner and/or in substance with the hub and the rim. A process is provided for the manufacture of the wheel.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 8, 2019
    Assignee: THYSSENKRUPP CARBON COMPONENTS GMBH
    Inventors: Jens Werner, Christian Köhler, André Bartsch, Sandro Mäke, Michael Dreßler, Martin Lepper, Werner Hufenbach
  • Patent number: 10040917
    Abstract: The invention relates to a 1C system and a method for manufacturing semifinished products (prepregs) and components with the 1C system. The problem is solved by a 1C system comprised of an epoxy resin and a secondary amine; the secondary amine is imidazole, an imidazole derivative or a complex of the general formula MeL4X2, wherein Me is a bivalent metal cation selected from copper, cobalt, nickel and zinc, L is a ligand selected from imidazole and an imidazole derivative, and X is an anion selected from fluoride, chloride, bromide, iodide and nitrate. Furthermore, the invention includes a method for manufacturing impregnated semifinished products for the production of duroplastic fiber-reinforced components using a 1C system.
    Type: Grant
    Filed: November 14, 2015
    Date of Patent: August 7, 2018
    Assignees: Leichtbau-Zentrum Sachsen GmbH, New Era Materials Sp. z o.o.
    Inventors: Ryszard Pilawka, Maciej Jarkowski, Werner Hufenbach, Martin Lepper, Ole Renner, Andrzej Czulak, Sirko Geller
  • Patent number: 9828030
    Abstract: Longitudinal members for motor vehicles may generally include a supporting element that is releasably connectable to an energy absorption mechanism. The supporting element may typically include a joining zone that can be used to secure the supporting element to one or more chassis or drive components of the motor vehicle. The supporting element and the energy absorption mechanism may be comprised of fiber-reinforced plastic. More specifically, the supporting element may be comprised of a plurality of length portions having different fiber orientations. For example, a first length portion may have fibers oriented substantially parallel to a horizontal longitudinal plane about which the supporting element is positioned, whereas a second length portion between the first length portion and the energy absorption mechanism may have intersecting fibers oriented oblique to the horizontal longitudinal plane.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: November 28, 2017
    Assignee: THYSSENKRUPP STEEL EUROPE AG
    Inventors: Lothar Patberg, Stefan Mayer, Torsten Krahnert, Werner Hufenbach, Enrico Ladusch, Jens Werner, André Kieβling, Alexander Herbig, Jörn Kiele, Martin Lepper
  • Patent number: 9783235
    Abstract: The present disclosure relates to a protective apparatus that can be positioned along an underside of a motor vehicle and, in many cases, near a front or rear region of the motor vehicle. The protective apparatus may include an underbody made from fiber-reinforced plastic for protecting assemblies or components arranged above it against damage as a consequence of stone chipping or ground contact. Further, the underbody may have three-dimensionally structured regions for increasing its rigidity, and the underbody may be designed to absorb chassis and/or crash loads and may include integrated holders for movably attaching chassis links.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: October 10, 2017
    Assignee: THYSSENKRUPP STEEL EUROPE AG
    Inventors: Lothar Patberg, Stefan Mayer, Torsten Krahnert, Werner Hufenbach, Enrico Ladusch, Jens Werner, André Kieβling, Alexander Herbig, Jörn Kiele, Martin Lepper
  • Patent number: 9701094
    Abstract: The object of the present invention is a layered semi-finished product having a layer sequence containing at least one layer of an unconsolidated fabric of reinforcing fibers. At reduced pressure, this layer sequence is arranged between a top and a bottom film connected to each other along their periphery in a pressure-retaining manner. In advantageous modifications of the layered semi-finished product according to the invention, the preforming of the semi-finished, as well as the inclusion of metallic inserts or other components into said semi-finished is intended. Furthermore, a method for producing the layered semi-finished product according to the invention is described.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: July 11, 2017
    Assignees: Technische Universität Dresden, Thyssenkrupp Steel Europe AG, Leichtbau-Zentrum Sachsen GmbH
    Inventors: Torsten Krahnert, Lothar Patberg, Stefan Mayer, Marcus Knobloch, Jens Werner, Werner Hufenbach, Martin Lepper
  • Publication number: 20170144347
    Abstract: The subject matter of the present invention pertains to a RTM tool having a sealing system. This sealing system comprises an elastic sealing strip which is disposed in an undercut manner in one of at least two tool parts to be sealed. It is characterized in that the sealing strip is essentially stressed perpendicular to the sealing strip surface when the tool parts are closed by means of the part of the tool pressing on the sealing strip and deforming it into the sealing gap which is present, in the direction of the mould cavity. The sealing strip comes into contact with the moulding compound without forming a mechanical connection therewith.
    Type: Application
    Filed: June 18, 2015
    Publication date: May 25, 2017
    Inventors: Werner Hufenbach, Martin Lepper, Jens Werner, Jörn Kiele
  • Publication number: 20170137586
    Abstract: The invention relates to a 1C system and a method for manufacturing semifinished products (prepregs) and components with the 1C system. The problem is solved by a 1C system comprised of an epoxy resin and a secondary amine; the secondary amine is imidazole, an imidazole derivative or a complex of the general formula MeL4X2, wherein Me is a bivalent metal cation selected from copper, cobalt, nickel and zinc, L is a ligand selected from imidazole and an imidazole derivative, and X is an anion selected from fluoride, chloride, bromide, iodide and nitrate. Furthermore, the invention includes a method for manufacturing impregnated semifinished products for the production of duroplastic fiber-reinforced components using a 1C system.
    Type: Application
    Filed: November 14, 2015
    Publication date: May 18, 2017
    Inventors: Ryszard Pilawka, Maciej Jarkowski, Werner Hufenbach, Martin Lepper, Ole Renner, Andrzej Czulak, Sirko Geller
  • Publication number: 20170122395
    Abstract: A torsion spring may be configured as a torsion bar or a helical spring made of a spring wire made of fiber-composite material. The torsion spring may have a plurality of layers of fiber reinforcement that have been saturated with a matrix material, wherein the layers may have fibers that are tension-loaded and fibers that are compression-loaded. The at least one compression-loaded group may have a lower group stiffness than the tension-loaded group with the highest group stiffness. Methods for designing or making torsion springs made of fiber-composite material are also disclosed.
    Type: Application
    Filed: April 14, 2015
    Publication date: May 4, 2017
    Applicants: ThyssenKrupp Federn und Stabilisatoren GmbH, ThyssenKrupp AG
    Inventors: Jörn Kiele, Werner Hufenbach, Martin Lepper, Jens Werner
  • Patent number: 9616621
    Abstract: A one-part wheel which is made of fiber composites without interruption of fibers with excellent mechanical properties and with low weight at the same time as well as a process for the manufacture thereof. The wheel has especially a rim well as well as a wheel disk passing over into a wheel flange of the rim well, where the wheel disk is formed at least partly by fiber layers, which run from the rim well over a wheel flange and the wheel disk. The wheel is manufactured by a multipart mold with parts displaceable at least in the axial direction. The mold is completely removed after the deposition of fibers or remains as a lost core in the wheel.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: April 11, 2017
    Assignee: THYSENNKRUPP CARBON COMPONENTS GMBH
    Inventors: Jens Werner, Christian Köhler, André Bartsch, Sandro Mäke, Michael Dreβler, Martin Lepper, Werner Hufenbach
  • Patent number: 9616704
    Abstract: A one-part wheel which is made of fiber composites without interruption of fibers with excellent mechanical properties and with low weight at the same time as well as a process for the manufacture thereof. The wheel has especially a rim well as well as a wheel disk passing over into a wheel flange of the rim well, where the wheel disk is formed at least partly by fiber layers, which run from the rim well over a wheel flange and the wheel disk. The wheel is manufactured by a multipart mold with parts displaceable at least in the axial direction. The mold is completely removed after the deposition of fibers or remains as a lost core in the wheel.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: April 11, 2017
    Assignee: THYSSENKRUPP CARBON COMPONENTS GMBH
    Inventors: Jens Werner, Christian Köhler, André Bartsch, Sandro Mäke, Michael Dreβler, Martin Lepper, Werner Hufenbach
  • Patent number: 9586366
    Abstract: A rim well with integrated flange made of fiber composite as well as to a method for manufacturing same. The flange is formed by inwardly directed protuberances of fiber layers of the rim well, wherein the fiber layers transition to the flange from the rim well without interruption of the fibers. The manufacture is carried out by depositing fiber material on a mold, which corresponds to the contour of the rim well and has a radially circumferential or segmented groove. The fibers are deposited such that the fibers of at least one fiber layer have protuberances directed into the groove. A multipart mold, which makes it possible to reduce the width of the groove and thus a deformation of the protuberances, is preferably used.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: March 7, 2017
    Assignee: THYSSENKRUPP CARBON COMPONENTS GMBH
    Inventors: Jens Werner, Christian Köhler, André Bartsch, Sandro Mäke, Michael Dreβler, Martin Lepper, Werner Hufenbach