Patents by Inventor Jan de Groot

Jan de Groot 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: 7178621
    Abstract: The invention relates to a motorcycle comprising a frame, in which at least an engine is mounted; a front fork pivoted to the frame, in which at least a front wheel is mounted; a rear fork pivoted to the frame, in which at least a rear wheel to be driven by the engine is mounted; as well as a spring system connected to the rear fork and to the frame, wherein the spring system is arranged for exerting forces on the frame in a forward direction substantially parallel to the direction of movement of the motorcycle.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: February 20, 2007
    Inventor: Jan de Groot
  • Publication number: 20050205327
    Abstract: The invention relates to a motorcycle comprising a frame, in which at least an engine is mounted; a front fork pivoted to the frame, in which at least a front wheel is mounted; a rear fork pivoted to the frame, in which at least a rear wheel to be driven by the engine is mounted; as well as a spring system connected to the rear fork and to the frame. The object of the invention is to provide a motorcycle as referred to in the introduction that has improved driving characteristics. According to the invention, the motorcycle is to that end characterized in that the spring system is arranged for exerting forces on the frame in a forward direction substantially parallel to the direction of movement of the motorcycle. As a result, the extent to which jolting upward and downward springing of the frame and the front wheel takes place is significantly reduced, and the traction of the rear wheel and the steering behaviour of the front wheel are advantageously affected.
    Type: Application
    Filed: January 12, 2005
    Publication date: September 22, 2005
    Inventor: Jan de Groot