Patents Assigned to Yu Hsun Hsuan
  • Punch having changeable punching member
    Patent number: 6189220
    Abstract: A punch includes a socket disposed on a plate, a barrel supported above the plate, a shaft slidably received in the barrel and a mold piece detachably secured to the shaft. One or more levers have one end pivotally secured to the barrel and have a middle portion coupled to the shaft for moving the shaft and the mold piece downward to actuate on the socket. The mold piece is detachably secured to the shaft with a threaded ferrule. The punch includes one or more mold pieces and sockets of various shapes which may be replaced with each other.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: February 20, 2001
    Assignee: Yu Hsun Hsuan
    Inventor: Cheng Nan Chen