Patents by Inventor Kai-An Wu

Kai-An Wu 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).

  • Anti-theft tumbler pins of a lock core
    Patent number: 6601419
    Abstract: A lock core device of an anti-theft tumbler pin type includes a housing defining a lock core hole, a plurality of first tumbler pin holes, at least one side tumbler pin hole, and a transverse hole, a lock core rotatably mounted in the housing and defining a plurality of second tumbler pin holes which are moved by the lock core to align with the first tumbler pin holes and to align with the side tumbler pin hole, a plurality of tumbler pin sets each slidably mounted in the first tumbler pin hole and each including a top tumbler pin and a bottom tumbler pin movable in the second tumbler pin hole, at least one block pin slidably mounted in the side tumbler pin hole and rested on a peripheral wall of the lock core or inserted into the second tumbler pin hole, and a control tumbler pin set slidably mounted in the transverse hole and including a transverse tumbler pin rested on the block pin.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: August 5, 2003
    Assignee: Kai-An Wu
    Inventors: Mao-Ming Huang, Kai-An Wu
  • Anti-theft tumbler pins of a lock core
    Publication number: 20010029761
    Abstract: A lock core device of an anti-theft tumbler pin type includes a housing defining a lock core hole, a plurality of first tumbler pin holes, at least one side tumbler pin hole, and a transverse hole, a lock core rotatably mounted in the housing and defining a plurality of second tumbler pin holes which are moved by the lock core to align with the first tumbler pin holes and to align with the side tumbler pin hole, a plurality of tumbler pin sets each slidably mounted in the first tumbler pin hole and each including a top tumbler pin and a bottom tumbler pin movable in the second tumbler pin hole, at least one block pin slidably mounted in the side tumbler pin hole and rested on a peripheral wall of the lock core or inserted into the second tumbler pin hole, and a control tumbler pin set slidably mounted in the transverse hole and including a transverse tumbler pin rested on the block pin.
    Type: Application
    Filed: March 23, 2001
    Publication date: October 18, 2001
    Inventors: Mao-Ming Hwang, Kai-An Wu