Patents by Inventor Kam Ming Li

Kam Ming Li 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: 7607680
    Abstract: A luggage trolley comprises a baseboard, a pull handle and running wheels. The running wheels are respectively rotatably fixed at two ends of an underside of the baseboard. The pull handle is fixed on the first baseboard periphery and its extending direction and a running direction of the running wheels are in a same plane surface. A foldable board is pivotably connected to a second baseboard periphery. A supporting axis which is parallel to the axle is disposed at an underside of the foldable board. A movable supporting stand is rotationally fixed on the supporting axis. One end of a spiral spring is fixed on the supporting axis and an opposite end thereof is fixed on a hook disposed on the movable supporting stand at a predetermined distance from the supporting axis.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: October 27, 2009
    Inventor: Kam Ming Li
  • Publication number: 20090121456
    Abstract: A luggage trolley comprises a baseboard, a pull handle and running wheels. The running wheels are respectively rotatably fixed at two ends of an underside of the baseboard. The pull handle is fixed on the first baseboard periphery and its extending direction and a running direction of the running wheels are in a same plane surface. A foldable board is pivotably connected to a second baseboard periphery. A supporting axis which is parallel to the axle is disposed at an underside of the foldable board. A movable supporting stand is rotationally fixed on the supporting axis. One end of a spiral spring is fixed on the supporting axis and an opposite end thereof is fixed on a hook disposed on the movable supporting stand at a predetermined distance from the supporting axis.
    Type: Application
    Filed: November 13, 2007
    Publication date: May 14, 2009
    Inventor: Kam Ming Li