Patents by Inventor Hjalmar S. Halvorsen

Hjalmar S. Halvorsen 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).

  • Roller skate arrangement
    Patent number: 4659095
    Abstract: A roller skate arrangement, which comprises a rigid sole portion (12) to which there is secured on the top side of a shoe upper portion (11) and on the under side a forward and rear wheel pair or wheel bogies (23a, 26a). The wheels (23a, 26a) of each wheel pair can be adjusted to different distances from the sole portion (12) in order to permit oblique positioning of the sole portion (12) sideways relative to the road surface. The wheels (23a, 26a) of the rear wheel pair are pivotable about a first pivotal axis (17a) at right angles to the main plane of the sole portion (12), while the wheels of the forward wheel pair are pivotable about a second pivotal axis at right angles to the main plane of the sole portion.
    Type: Grant
    Filed: September 17, 1985
    Date of Patent: April 21, 1987
    Inventor: Hjalmar S. Halvorsen