Patents by Inventor Nian Chun Liu

Nian Chun Liu 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).

  • Balanced regulator having a balanced trim including a variable pressure sense area
    Patent number: 9678516
    Abstract: A balanced pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve seat is disposed within the fluid passageway. A balanced plug assembly is disposed within the fluid passageway, the balanced plug assembly including a valve plug that cooperates with the valve seat to selectively open or close the fluid passageway, a retainer operatively connecting the valve plug to a valve stem, a diaphragm separating a chamber from the fluid passageway, a central balancing passage that fluidly connects the fluid passageway with the chamber, and a peripheral balancing passage that fluidly connects the fluid passageway with the chamber, the peripheral balancing passage being located between the retainer and the valve plug.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: June 13, 2017
    Assignee: EMERSON PROCESS MANAGEMENT REGULATOR TECHNOLOGIES, INC.
    Inventors: Guolei Fan, Biao Zhou, Nian Chun Liu, Jing Zhang, Yang He, Tung K. Nguyen
  • BALANCED REGULATOR HAVING A BALANCED TRIM INCLUDING A VARIABLE PRESSURE SENSE AREA
    Publication number: 20150234395
    Abstract: A balanced pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve seat is disposed within the fluid passageway. A balanced plug assembly is disposed within the fluid passageway, the balanced plug assembly including a valve plug that cooperates with the valve seat to selectively open or close the fluid passageway, a retainer operatively connecting the valve plug to a valve stem, a diaphragm separating a chamber from the fluid passageway, a central balancing passage that fluidly connects the fluid passageway with the chamber, and a peripheral balancing passage that fluidly connects the fluid passageway with the chamber, the peripheral balancing passage being located between the retainer and the valve plug.
    Type: Application
    Filed: February 18, 2015
    Publication date: August 20, 2015
    Inventors: Guolei Fan, Biao Zhou, Nian Chun Liu, Jing Zhang, Yang He, Tung K. Nguyen