Patents by Inventor Douglas Schaper

Douglas Schaper 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: 5934397
    Abstract: A modular vehicle includes a frame having three main sections; a front section, a rear section and a center section. The front and rear sections may be displaced vertically with respect to center section prior to being assembled. Each section is separately assembled and standardized so that various devices may be incorporated to each section and each section may be otherwise modified to allow a specific vehicle to be easily and quickly manufactured.Another aspect of the invention is a drive assembly that includes at least two electric motors, each having different operating characteristics. Each motor is connected to a common drive shaft through a controllable clutch. A drive system controller selectively activates each motor in response to power demand, as determined by a relative position of an accelerator pedal, by engaging the clutch of a selected motor and simultaneously providing power to the selected motor.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: August 10, 1999
    Inventor: Douglas Schaper