Patents by Inventor Ling-Ling Yu

Ling-Ling Yu 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).

  • Multiple gearing switch device
    Patent number: 6939262
    Abstract: A gearing switch device includes a switch assembly that is switched to one of positions to engage one of the gears in an idle gear set with an input gear and a transferring gear of a speed reduction device. The transferring gear drives a ring gear that is engaged with planetary gears device connected to one side of a disk and an output gear is connected to the other side of the disk. By the different types of engagement between the gears of the idle gear set and the transferring gear, the speed of the disk is changeable so as to have desired output torque.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: September 6, 2005
    Inventor: Ling-Ling Yu
  • MULTIPLE GEARING SWITCH DEVICE
    Publication number: 20050192149
    Abstract: A gearing switch device includes a switch assembly that is switched to one of positions to engage one of the gears in an idle gear set with an input gear and a transferring gear of a speed reduction device. The transferring gear drives a ring gear that is engaged with planetary gears device connected to one side of a disk and an output gear is connected to the other side of the disk. By the different types of engagement between the gears of the idle gear set and the transferring gear, the speed of the disk is changeable so as to have desired output torque.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Inventor: Ling-Ling Yu