Patents by Inventor DIRK SCHOBER

DIRK SCHOBER 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).

  • VALVE STEM SEAL COMPRISING A VALVE ROTATING DEVICE
    Publication number: 20240141810
    Abstract: A valve rotating device with valve stem seal includes a valve rotating device, with a cylinder head rest and a spring rest intended to bear against a valve spring during operation. The valve rotating device is designed to rotate the spring rest relative to the cylinder head rest during operation. A valve stem seal is attached to the cylinder head rest of the valve rotating device. The valve stem seal being designed to bear against a valve stem and to seal same during rotational and axial movements.
    Type: Application
    Filed: November 16, 2021
    Publication date: May 2, 2024
    Inventors: DIRK SCHOBER, FRANK ZWEIN, FLORIAN RINGELING, THORSTEN MATTHIAS, STEFAN KELLERMANN
  • Method and device for manufacturing hollow, internally cooled valves
    Patent number: 11898473
    Abstract: A method for shaping a hollow valve preform of a pull rod (20) includes a structuring bulb (22) which is inserted into the cavity (56) of a shaft portion (44) of a valve preform. The structuring bulb (22) has an outer diameter, and has an outer structuring, whereafter the hollow shaft portion (44) is shaped, wherein at least a portion of an inner diameter of the cavity (56) is reduced below an outer diameter of the structuring bulb (22). The structuring bulb (22) is then pulled out through the shaped shaft portion (44), wherein the outer structuring is at least partially pressed into the surface of the cavity (56).
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: February 13, 2024
    Assignee: Federal-Mogul Valvetrain GmbH
    Inventors: Thorsten Matthias, Dirk Schober
  • METHOD AND DEVICE FOR MANUFACTURING HOLLOW, INTERNALLY COOLED VALVES
    Publication number: 20220403761
    Abstract: A method for shaping a hollow valve preform of a pull rod (20) includes a structuring bulb (22) which is inserted into the cavity (56) of a shaft portion (44) of a valve preform. The structuring bulb (22) has an outer diameter, and has an outer structuring, whereafter the hollow shaft portion (44) is shaped, wherein at least a portion of an inner diameter of the cavity (56) is reduced below an outer diameter of the structuring bulb (22). The structuring bulb (22) is then pulled out through the shaped shaft portion (44), wherein the outer structuring is at least partially pressed into the surface of the cavity (56).
    Type: Application
    Filed: July 22, 2020
    Publication date: December 22, 2022
    Inventors: THORSTEN MATTHIAS, DIRK SCHOBER
  • Valve for internal combustion engines having a guide vane for coolant
    Patent number: 11441454
    Abstract: An internally cooled inlet or outlet valve for internal combustion engines, has a valve disc, a valve stem and a cavity inside the valve stem and the valve disc. A coolant is arranged in the cavity, wherein the cavity is provided with at least one guide vane for the coolant.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: September 13, 2022
    Assignee: Federal-Mogul Valvetrain GmbH
    Inventors: Dirk Schober, Stefan Kellermann, Guido Bayard
  • VALVE FOR INTERNAL COMBUSTION ENGINES HAVING A GUIDE VANE FOR COOLANT
    Publication number: 20180274401
    Abstract: An internally cooled inlet or outlet valve for internal combustion engines, has a valve disc, a valve stem and a cavity inside the valve stem and the valve disc. A coolant is arranged in the cavity, wherein the cavity is provided with at least one guide vane for the coolant.
    Type: Application
    Filed: July 27, 2016
    Publication date: September 27, 2018
    Inventors: DIRK SCHOBER, STEFAN KELLERMANN, GUIDO BAYARD