Patents by Inventor Frank W. Meyer, Jr.

Frank W. Meyer, Jr. 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).

  • Valve seat assembly
    Patent number: 4878651
    Abstract: A through conduit gate valve apparatus having a valve seat assembly that is field maintainable and which prevents the occurrence of pressure lock is disclosed. Each valve seat assembly includes a retainer ring fixed in the valve body and a pressure responsive seat ring that seals with the gate member. The seat ring is responsive to fluid pressure in the valve flow passageways for maintaining and enhancing the face seal with the gate and to fluid pressure in the valve chamber for automatically venting the valve chamber to prevent occurrence of a pressure lock condition.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: November 7, 1989
    Assignee: Worldwide Oilfield Machine, Inc.
    Inventor: Frank W. Meyer, Jr.