Patents by Inventor Robert Josef MÄRK

Robert Josef MÄRK 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: 11092190
    Abstract: A steering shaft having an outer shaft and an inner shaft accommodated therein in a torque-locking, axially displaceable manner and an axial inner stop which projects radially outwards from an outer face of the inner shaft. When the inner shaft is pulled out of the outer shaft, the axial inner stop strikes against an axial outer stop projecting radially inwards from an inner face of the outer shaft, wherein the axial displacement of the inner shaft is limited in the pull-out direction. With regard to simple production of the outer stops with the least possible deformation of the entire cross section of the outer shaft, the outer stop is introduced by at least one forming process into an end portion of the outer shaft, wherein the axis of the direction of introduction in each case forms an angle of more than 20° with the radial direction of the outer shaft.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 17, 2021
    Assignees: THYSSENKRUPP PRESTA AG, THYSSENKRUPP AG
    Inventor: Robert Josef Märk
  • Patent number: 10793180
    Abstract: A method for producing a length-adjustable steering shaft having a hollow shaft in which a toothed shaft is received so as to be axially telescopic. The toothed shaft has a toothing with teeth on an external circumference that extend in the axial direction and which engages in a form-fitting manner in an inner toothing of the hollow shaft. A sliding layer of thermoplastic plastics material is at least in portions attached between the inner toothing and the toothing. In order to enable an improved fastening of the sliding layer to the toothing, prior to attaching the sliding layer, form-fitting elements which for forming a form-fitting connection that is effective in the axial direction are brought to engage with the sliding layer are configured in the region of the toothing of the toothed shaft or the inner toothing of the hollow shaft.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 6, 2020
    Assignees: THYSSENKRUPP PRESTA AG, THYSSENKRUPP AG
    Inventors: Marius Breuer, Janick Durot, Paul Schwarzhans, Joachim Tuertscher, Robert Josef Maerk
  • Publication number: 20190176869
    Abstract: A method for producing a length-adjustable steering shaft having a hollow shaft in which a toothed shaft is received so as to be axially telescopic. The toothed shaft has a toothing with teeth on an external circumference that extend in the axial direction and which engages in a form-fitting manner in an inner toothing of the hollow shaft. A sliding layer of thermoplastic plastics material is at least in portions attached between the inner toothing and the toothing. In order to enable an improved fastening of the sliding layer to the toothing, prior to attaching the sliding layer, form-fitting elements which for forming a form-fitting connection that is effective in the axial direction are brought to engage with the sliding layer are configured in the region of the toothing of the toothed shaft or the inner toothing of the hollow shaft.
    Type: Application
    Filed: August 9, 2017
    Publication date: June 13, 2019
    Applicants: THYSSENKRUPP PRESTA AG, thyssenkrupp AG
    Inventors: Marius BREUER, Janick DUROT, Paul SCHWARZHANS, Joachim TUERTSCHER, Robert Josef MAERK
  • Publication number: 20190145456
    Abstract: A steering shaft having an outer shaft and an inner shaft accommodated therein in a torque-locking, axially displaceable manner and an axial inner stop which projects radially outwards from an outer face of the inner shaft. When the inner shaft is pulled out of the outer shaft, the axial inner stop strikes against an axial outer stop projecting radially inwards from an inner face of the outer shaft, wherein the axial displacement of the inner shaft is limited in the pull-out direction. With regard to simple production of the outer stops with the least possible deformation of the entire cross section of the outer shaft, the outer stop is introduced by at least one forming process into an end portion of the outer shaft, wherein the axis of the direction of introduction in each case forms an angle of more than 20° with the radial direction of the outer shaft.
    Type: Application
    Filed: June 16, 2017
    Publication date: May 16, 2019
    Applicants: THYSSENKRUPP PRESTA AG, thyssenkrupp AG
    Inventor: Robert Josef MÄRK