Patents by Inventor Ludwig Held

Ludwig Held 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: 4168627
    Abstract: Apparatus for mounting and centering a wheel on a mounting spindle of a testing machine, including a shaft portion, a centering taper member on the shaft portion for engaging a center hole in a wheel to be mounted, a fixing nut which can be screwed on the shaft portion for pressing the wheel against the centering taper member for centering the wheel, a spring operable to urge the taper member towards the nut, a housing member on the shaft portion around a part of the spring, a covering means covering the spring for protection thereof, the covering means being disposed on the shaft portion and at least partly in the housing member, and means for limiting the movement of the spring towards a fully relaxed condition thereof thereby to maintain a pre-stressing in the spring.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: September 25, 1979
    Assignee: Gebr. Hofmann GmbH & Co. KG Maschinenfabrik
    Inventors: Ludwig Held, Eickhart Goebel