Patents by Inventor Vincent K. W. Lam

Vincent K. W. Lam 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).

  • Compact drive mechanism for electrically powered vehicle
    Patent number: 7159677
    Abstract: A compact and lightweight drive mechanism for an electrically powered vehicle such as a wheelchair or a scooter. The compact drive mechanism includes a gearmotor combining a motor and a gearbox. High strength rare earth magnets and a large diameter enable the motor to generate a high torque. Gearmotor efficiency is maximized by placing the motor and gearbox in a direct drive relationship, with the shafts of both motor and gearbox parallel to one another. The compact drive mechanism weighs less than conventional drive mechanisms and occupies less space. The compact drive mechanism therefore improves efficiency and lowers power requirements over conventional systems.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: January 9, 2007
    Assignee: CCL Industrial Motor Limited
    Inventors: Philip H. L. Lam, Vincent K. W. Lam