Patents by Inventor Hellmuth Eckhardt

Hellmuth Eckhardt 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: 4030170
    Abstract: At least one barb is formed on the needle with a groove between the barb and the needle shaft. All of the surfaces of the barb and all of the surfaces of the groove are completely rounded in such a manner that no plane surfaces remain.In some preferred modifications, the angle included by the forward line of the inside surface of the barb and the needle axis is 90.degree. or more, and may range between 90.degree.-100.degree..The means for fixing the felting needle to a needle board may consist of a laterally deformed portion provided at the rear end of the needle shaft and extending transversely to the needle axis.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: June 21, 1977
    Assignee: Torrington GmbH
    Inventor: Hellmuth Eckhardt
  • Patent number: RE29583
    Abstract: A combined radial axial roller or needle bearing with a drawn outer cup, in which the inner surface serves as a raceway for the roller bodies acting in radial direction and a part integrally formed with the cup and disposed generally normal of the cup serves as a support for the roller bodies acting in axial direction, said cup is formed pot-shaped, the inner surface of the bottom part serving as a support of the roller bodies acting in axial direction.
    Type: Grant
    Filed: April 29, 1976
    Date of Patent: March 21, 1978
    Inventors: Hellmuth Eckhardt, Reiner Sauerbier