Patents by Inventor Oswald Pertramer

Oswald Pertramer 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: 5092582
    Abstract: The invention concerns a sporting and exercise apparatus movable by muscular force including a frame having for the user an elongated platform supported by at least two wheels and a mechanical hand lever-drive for converting a lever motion into a rotary motion of at least one of the wheels. The lever drive has at least one hand lever hinged on the frame and having a toothed segment interconnecting a first and a second rotatable shaft each having a first and a second gear in which each first gear is supported on the shaft by free wheel units and in which a drive pinion is fixedly connected to the second shaft so that either forward or rearward movement of the hand lever will actuate one of the first gears and impart drive torque in the direction of movement of the apparatus while the other first gears torque is limited due to the action of the corresponding free wheel unit.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: March 3, 1992
    Inventor: Oswald Pertramer
  • Patent number: 5050864
    Abstract: The invention concerns a sporting and exercise apparatus movable by muscular force consisting of a frame having for the user an elongated platform supported by at least two wheels and of a mechanical hand-lever drive for converting a lever motion into a rotary motion of at least one of the wheels. The lever drive has at least one hand lever hinged on the frame which actuates either two racks, at least one gear segment or a chain/segment drive which act upon gears supported on a driving axle so that the racks, segment or the chain, when the lever is moved in one direction, actuate one gear to rotate clockwise and another gear counterclockwise, each gear being supported on the driving axle via a free-wheel unit.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: September 24, 1991
    Inventor: Oswald Pertramer