Patents by Inventor John Wun-Sing Chu

John Wun-Sing Chu 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).

  • Patent number: 7406846
    Abstract: An electronic lock incorporating one or more shape memory metal wire segment as its electromechanical transducer. An electronic control circuit injects electrical current into the shape memory metal wire, causing it to heat up and contract. A gate is positioned by the action of the shape memory metal wire(s) to either allow or block the movement of a locking bolt that affect locking or unlocking. Millions of operational cycles are achieved by limiting the stretching of the shape memory metal wire at low temperature to small percentages of its total length. The design lends itself to miniaturization, with commensurate reduction in power consumption, that is useful to the evolution of future electronic locks.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: August 5, 2008
    Assignee: Nanotechnology, Inc.
    Inventor: John Wun-Sing Chu
  • Patent number: 5831417
    Abstract: A pseudo-mechanical system in accordance with the invention comprises an electrical generator which converts mechanical energy into electrical energy to power the resistive heating of an ohmic electromechanical component, whose consequent form change is exploited to perform mechanical work.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: November 3, 1998
    Assignee: Nanotechnology, Inc.
    Inventor: John Wun-sing Chu