Patents by Inventor Alan Liang

Alan Liang 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).

  • Tubular door lock having selective actuators
    Patent number: 6974163
    Abstract: A tubular door lock includes a dead bolt and a follower slidably received in a housing and coupled together. The follower included a groove formed between two levers, two actuators are rotatably received in the housing and each includes one or more actuating fingers engageable with the levers of the follower, for selectively actuating the levers of the follower to move the dead bolt relative to the housing, when the actuators are rotated relative to the housing. The provision of the actuators in different positions relative to the housing allows the lock device or the knob to engage with either of actuators, for allowing the lock device and the knob to be secured into the door panel at different positions.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: December 13, 2005
    Inventors: Fu Chang Peng, Alan Liang, Chih Hung Hsiao
  • Electric door lock openable by key
    Patent number: 6935149
    Abstract: An electric door lock includes a handle rotatably attached to a housing, a lock device engaged in the housing, a follower rotatably secure the handle to the housing, an electromagnetic control device having a receptacle rotatably received in the follower, a plunger slidably engaged in the receptacle and extendible out of the receptacle to engage with the follower, and a latching device for selectively latching the plunger to the receptacle. The plunger may be selectively actuated to engage with the follower either by the lock device and correct keys or by the electromagnetic control device with correctly entered passwords or secret codes.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: August 30, 2005
    Inventors: Fu Chang Peng, Alan Liang, Chih Hung Hsiao
  • Tubular door lock having selective actuators
    Publication number: 20050067843
    Abstract: A tubular door lock includes a dead bolt and a follower slidably received in a housing and coupled together. The follower included a groove formed between two levers, two actuators are rotatably received in the housing and each includes one or more actuating fingers engageable with the levers of the follower, for selectively actuating the levers of the follower to move the dead bolt relative to the housing, when the actuators are rotated relative to the housing. The provision of the actuators in different positions relative to the housing allows the lock device or the knob to engage with either of actuators, for allowing the lock device and the knob to be secured into the door panel at different positions.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventors: Fu Peng, Alan Liang, Chih Hsiao
  • Electric lock device
    Patent number: D502859
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: March 15, 2005
    Inventors: Fu Chang Peng, Alan Liang, Chih Hung Hsiao