Patents by Inventor Li Huiqing

Li Huiqing 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).

  • Thermostatic expansion valve with check valve
    Patent number: 7441563
    Abstract: A valve is provided that comprises a valve body including an inlet, an outlet, and a check valve chamber having an opening through the side of the valve body. The valve has a cover secured within the side opening in the valve body. A first valve opening is disposed between the inlet chamber and outlet chamber. A control valve is movable relative to the first valve opening to regulate fluid flow through the first opening when fluid flow is in the inlet-to-outlet direction, and is movable to engage the first valve opening to restrict fluid flow in the outlet-to-inlet direction. The valve comprises a second valve opening disposed between the check valve chamber and the outlet chamber. A check valve member is movable relative to the second valve opening to restrict forward flow and permit reverse flow through the second valve opening.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: October 28, 2008
    Assignee: Emerson Electric Co.
    Inventors: Li Huiqing, Ronald L. Campbell, Michael J. Noble, George J. Sciuto
  • Thermostatic expansion valve with check valve
    Publication number: 20070193630
    Abstract: A valve is provided that comprises a valve body including an inlet, an outlet, and a check valve chamber having an opening through the side of the valve body. The valve has a cover secured within the side opening in the valve body. A first valve opening is disposed between the inlet chamber and outlet chamber. A control valve is movable relative to the first valve opening to regulate fluid flow through the first opening when fluid flow is in the inlet-to-outlet direction, and is movable to engage the first valve opening to restrict fluid flow in the outlet-to-inlet direction. The valve comprises a second valve opening disposed between the check valve chamber and the outlet chamber. A check valve member is movable relative to the second valve opening to restrict forward flow and permit reverse flow through the second valve opening.
    Type: Application
    Filed: February 14, 2007
    Publication date: August 23, 2007
    Inventors: Li Huiqing, Ronald L. Campbell, Michael J. Noble, George J. Sciuto