Patents by Inventor Rick Wei-Shou Pang

Rick Wei-Shou Pang 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).

  • Plug valve having seal segments with booster springs
    Patent number: 6554249
    Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: April 29, 2003
    Assignee: FMC Technologies, Inc.
    Inventors: Rick Wei-Shou Pang, Tep Ungchusri, Sergio Castillo
  • Plug valve having seal segments with booster springs
    Publication number: 20020179876
    Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.
    Type: Application
    Filed: May 30, 2001
    Publication date: December 5, 2002
    Inventors: Rick Wei-Shou Pang, Tep Ungchusri, Sergio Castillo