Patents by Inventor Xiaoqing Zheng

Xiaoqing Zheng 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).

  • Brush seal with spiral groove back plate
    Publication number: 20060214378
    Abstract: A brush seal includes a plurality of bristles, a front plate, and a back plate abutting the bristles, the back plate including at least one spiral groove therein to pressure balance the brush seal.
    Type: Application
    Filed: March 28, 2005
    Publication date: September 28, 2006
    Inventor: Xiaoqing Zheng
  • Rotary face seal assembly
    Patent number: 7044470
    Abstract: A rotary seal assembly including a first member having a sealing face and a second member having a sealing face with a number of pumping grooves therein. At least a first set of pumping grooves stating proximate a center portion of the sealing face and extending outward and at least a second set of pumping grooves starting proximate the center portion of the sealing face and extending inward to direct fluid fed to the center portion of the sealing face simultaneously both inwardly and outwardly from the center portion of the sealing face to provide a uniform fluid film thickness between the sealing faces of the first and second members when one sealing face cones due to thermal and/or pressure effects.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: May 16, 2006
    Assignee: PerkinElmer, Inc.
    Inventor: Xiaoqing Zheng
  • Rotary face seal assembly
    Publication number: 20020014743
    Abstract: A rotary seal assembly including a first member having a sealing face and a second member having a sealing face with a number of pumping grooves therein. At least a first set of pumping grooves stating proximate a center portion of the sealing face and extending outward and at least a second set of pumping grooves starting proximate the center portion of the sealing face and extending inward to direct fluid fed to the center portion of the sealing face simultaneously both inwardly and outwardly from the center portion of the sealing face to provide a uniform fluid film thickness between the sealing faces of the first and second members when one sealing face cones due to thermal and/or pressure effects.
    Type: Application
    Filed: July 11, 2001
    Publication date: February 7, 2002
    Inventor: Xiaoqing Zheng