Patents by Inventor Leonard Ducharme

Leonard Ducharme 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).

  • Publication number: 20070182245
    Abstract: The invention is a hydraulic braking system that captures an electric/hybrid vehicle's kinetic energy and utilizes it to assist in accelerating the vehicle or to recharge the vehicle's battery pack.
    Type: Application
    Filed: December 12, 2006
    Publication date: August 9, 2007
    Inventor: Leonard DuCharme
  • Publication number: 20070150132
    Abstract: The invention is an integrated motor-control/transmission control system for use with variable transmissions (IVT and CVT) in electric vehicles. The system allows an electric motor to operate a higher percentage of its total operating time at or close to peak efficiency than is allowed under PWM-style systems by allowing the motor to accelerate to peak without a load, or alternatively, with a relatively low load and then by utilizing a variable transmission to accelerate the vehicle.
    Type: Application
    Filed: November 30, 2006
    Publication date: June 28, 2007
    Inventors: Leonard DuCharme, Paul Ressler
  • Publication number: 20070095587
    Abstract: A drive train for a hybrid vehicle having first, second and third motors includes a first variable transmission, having an input shaft, and an output shaft coupled to a drive wheel of the vehicle, and first, second, and third clutched rotational drive connections. The rotational drive connections selectively interconnect an output shaft of the first, second and third motors, respectively, with the input shaft of the first transmission, whereby torque from each of the three motors can be selectively combined through the variable transmission to drive the drive wheel.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 3, 2007
    Inventor: Leonard DuCharme
  • Publication number: 20060070777
    Abstract: A drive wheel includes a pneumatic tire, a substantially solid split rim wheel configured to receive the pneumatic tire, and a geared hub with an internal transmission with multiple selectable speeds. The split rim wheel includes opposing side portions, and the geared hub is disposed between the opposing side portions of the split rim.
    Type: Application
    Filed: October 4, 2004
    Publication date: April 6, 2006
    Inventor: Leonard Ducharme
  • Publication number: 20060070785
    Abstract: A drive wheel includes a pneumatic tire, a substantially solid split rim wheel configured to receive the pneumatic tire, and a hub with an internal transmission configured to provide a variable transmission ratio. The split rim wheel includes opposing side portions, and the hub is disposed between the opposing side portions of the split rim.
    Type: Application
    Filed: October 6, 2004
    Publication date: April 6, 2006
    Inventor: Leonard Ducharme