Patents by Inventor STEFAN KELLERMAN

STEFAN KELLERMAN 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).

  • Internally cooled valve having a valve bottom, and method for the production thereof
    Patent number: 11311964
    Abstract: A method for manufacturing an internally cooled valve (2), includes providing a valve body (4) having a valve stem (6) that ends in a valve head (8). The valve body (4) has a cavity (10) that is open toward the valve head (8) and with a valve base element (12) by friction welding the valve base element (12) to the valve head (8). The valve bottom element (12) is preferably a sintered component.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: April 26, 2022
    Assignee: Federal-Mogul Valvetrain GmbH
    Inventors: Guido Bayard, Stefan Kellerman, Antonius Wolking, Luthfi Arief
  • INTERNALLY COOLED VALVE HAVING A VALVE BOTTOM, AND METHOD FOR THE PRODUCTION THEREOF
    Publication number: 20210086292
    Abstract: A method for manufacturing an internally cooled valve (2), includes providing a valve body (4) having a valve stem (6) that ends in a valve head (8). The valve body (4) has a cavity (10) that is open toward the valve head (8) and with a valve base element (12) by friction welding the valve base element (12) to the valve head (8). The valve bottom element (12) is preferably a sintered component.
    Type: Application
    Filed: August 7, 2018
    Publication date: March 25, 2021
    Inventors: GUIDO BAYARD, STEFAN KELLERMAN, ANTONIUS WOLKING, LUTHFI ARIEF