Patents by Inventor Zhihuang Dai

Zhihuang Dai 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).

  • Asynchronous non-constant-pitch spiral scroll-type fluid displacement machine
    Publication number: 20090022613
    Abstract: A scroll-type spiral fluid displacement machine having at least one pair of interfitting scroll elements. The scroll vanes of the scroll elements are constructed upon a base line spiral defined by the equation: L=K0?K1e??/K2 where L is the distance from the spiral's origin to any point on the spiral curve, ? is the angular displacement of the spiral, K0 is a constant greater than 1, K1, is a constant greater than 1, and K2 is a constant greater than 10.
    Type: Application
    Filed: July 16, 2007
    Publication date: January 22, 2009
    Inventors: Zhihuang DAI, Zhengzhi ZHAN
  • Bottle
    Patent number: D611345
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: March 9, 2010
    Assignee: Constar International, Inc.
    Inventors: Monis Bangi, Zhihuang Dai
  • Bottle
    Patent number: D611816
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: March 16, 2010
    Assignee: Constar International, Inc.
    Inventors: Monis Bangi, Zhihuang Dai