Patents by Inventor Eugen HAAF

Eugen HAAF 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).

  • Publication number: 20220412459
    Abstract: A multi-piece oil scraper piston ring includes a slotted spring element and at least one lamella element which is operatively connected to the slotted spring element and provided with a joint, the spring element being designed as a meander spring that axially receives and radially supports the lamella element, the two end regions of the meander spring being provided with legs that extend approximately parallel to one another and the axial length of which is designed such that the legs at least partially engage in the joint of the lamella element.
    Type: Application
    Filed: November 3, 2020
    Publication date: December 29, 2022
    Inventors: Thomas BASTUCK, Markus KELLNER, Eugen HAAF, Dirk BAERENREUTER