Patents by Inventor THORSTEN MATTHAIS

THORSTEN MATTHAIS 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).

  • Method for producing a hollow valve with an optimised interior stem geometry for internal combustion engines
    Patent number: 11732622
    Abstract: A method for producing a valve body of a hollow valve with optimised interior stem geometry includes a preform with a valve plate and a tubular wall surrounding a cavity. Flow forming the tubular wall over a flow-forming mandrel, which is inserted into the cavity to enlarge a length of the tubular wall. An interior area of the tubular wall is embossed with a structure either due to the fact that the flow-forming mandrel is a structuring mandrel having a surface structure, or alternatively, because the method includes a further step of reducing an outer diameter of the tubular wall by swaging or drawing and ironing over a structuring mandrel. Furthermore, a hollow valve is produced by this method.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: August 22, 2023
    Assignee: Federal-Mogul Valvetrain GmbH
    Inventors: Thorsten Matthais, Antonius Wolking, Guido Bayard
  • METHOD FOR PRODUCING A HOLLOW VALVE WITH AN OPTIMISED INTERIOR STEM GEOMETRY FOR INTERNAL COMBUSION ENGINES
    Publication number: 20210199029
    Abstract: A method for producing a valve body of a hollow valve with optimised interior stem geometry includes a preform with a valve plate and a tubular wall surrounding a cavity. Flow forming the tubular wall over a flow-forming mandrel, which is inserted into the cavity to enlarge a length of the tubular wall. An interior area of the tubular wall is embossed with a structure either due to the fact that the flow-forming mandrel is a structuring mandrel having a surface structure, or alternatively, because the method includes a further step of reducing an outer diameter of the tubular wall by swaging or drawing and ironing over a structuring mandrel. Furthermore, a hollow valve is produced by this method.
    Type: Application
    Filed: April 18, 2019
    Publication date: July 1, 2021
    Inventors: THORSTEN MATTHAIS, ANTONIUS WOLKING, GUIDO BAYARD