Patents by Inventor Sten Ivar Helmer Liljequist

Sten Ivar Helmer Liljequist 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).

  • Crank bearing device for pedal vehicles
    Patent number: 4089540
    Abstract: A crank bearing device for pedal vehicles comprises a cylindrical crank bearing shell, which is connected to the vehicle frame. A crank passes through this shell with a ball bearing bushing at each end of the crank arm. Between each of such a bushing and a cone, threaded onto the crank, are placed a number of ball bearings. The invention provides that these bushings have a cylindrical outer surface cooperating with a cylindrical inner surface of the shell and are provided with a number of low, protruding ribs. Through driving the bushing into the shell the ribs are forced into the material of the shell, thereby interconnecting the bushing and the shell with each other.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: May 16, 1978
    Assignee: Monark-Crescent AB
    Inventor: Sten Ivar Helmer Liljequist