Patents by Inventor Liu Chi Chang

Liu Chi Chang 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: 20110088677
    Abstract: A bowstring drawing assembly for a bow has a mounting frame, an operating device and a connecting belt. The mounting frame has a bottom bar, two supporting shafts and two pulleys. The supporting shafts are connected to the bottom bar. The pulleys are connected to the supporting shafts to hold the bow. The operating device is mounted on the mounting frame and has a holding seat, a rotating rod, a worm wheel, a worm shaft and a crank shaft. The holding seat is mounted on the bottom bar. The rotating rod is rotatably connected to the holding seat. The worm wheel is mounted around the rotating rod. The worm shaft is rotatably connected to the holding seat and engages the worm wheel. The crank shaft is connected securely to the worm shaft. The connecting belt is connected to the rotating rod of the operating device to mount around the bow.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Applicant: POE LANG ENTERPRISE CO., LTD.
    Inventor: Liu Chi Chang