Patents by Inventor Theerapong Prachakvej

Theerapong Prachakvej 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).

  • Self aligning spherical backseat assembly for a valve
    Patent number: 8672290
    Abstract: A gate valve assembly having a body, a gate, a stem, and a backseat for sealing between the stem and the body. The backseat is an annular member with a complementary surface on its inside that fits over a spherically shaped section of the stem; thus allowing the backseat to rotate and pivot with respect to the stem. An outer surface of the backseat is beveled for sealingly engaging a stem passage formed through the body. A flex member is provided that is for sealing a surface adjacent the backseat. The flex member can form a seal between the backseat member and the stem or between an annular retainer and the backseat.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: March 18, 2014
    Assignee: Vetco Gray Inc.
    Inventors: Chau Hoang, David Daniel Comeaux, Theerapong Prachakvej
  • SELF ALIGNING SPHERICAL BACKSEAT ASSEMBLY FOR A VALVE
    Publication number: 20130240774
    Abstract: A gate valve assembly having a body, a gate, a stem, and a backseat for sealing between the stem and the body. The backseat is an annular member with a complementary surface on its inside that fits over a spherically shaped section of the stem; thus allowing the backseat to rotate and pivot with respect to the stem. An outer surface of the backseat is beveled for sealingly engaging a stem passage formed through the body. A flex member is provided that is for sealing a surface adjacent the backseat. The flex member can form a seal between the backseat member and the stem or between an annular retainer and the backseat.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 19, 2013
    Applicant: VETCO GRAY INC.
    Inventors: Chau Hoang, David Daniel Comeaux, Theerapong Prachakvej