Patents by Inventor Leon Tseng

Leon Tseng 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).

  • Pedal crank having solid coupling
    Patent number: 7334500
    Abstract: A pedal crank includes a crank arm having a hole formed in one end to receive one end of a crank shaft which may be rotatably attached to a bicycle frame. An expanding device may be engaged in the end of the crank shaft for expanding the crank shaft to engage with the crank arm, and to solidly secure the crank shaft to the crank arm. The crank arm and the crank shaft may include knurled surfaces for solidly engaged with each other. The expanding device includes a locking member engaged into the crank shaft and having an inclined outer peripheral surface for engaging with the crank shaft, and for expanding the crank shaft when the locking member is moved relative to the crank shaft.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: February 26, 2008
    Inventor: Leon Tseng
  • Pedal crank having solid coupling
    Publication number: 20060260434
    Abstract: A pedal crank includes a crank arm having a hole formed in one end to receive one end of a crank shaft which may be rotatably attached to a bicycle frame. An expanding device may be engaged in the end of the crank shaft for expanding the crank shaft to engage with the crank arm, and to solidly secure the crank shaft to the crank arm. The crank arm and the crank shaft may include knurled surfaces for solidly engaged with each other. The expanding device includes a locking member engaged into the crank shaft and having an inclined outer peripheral surface for engaging with the crank shaft, and for expanding the crank shaft when the locking member is moved relative to the crank shaft.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 23, 2006
    Inventor: Leon Tseng