Patents by Inventor Fred R. O'Brien

Fred R. O'Brien 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).

  • High temperature valve
    Patent number: 5556074
    Abstract: A valve utilizes secondary attachment methods for internal valve parts. A guide channel is attached to a valve body with a primary pin and weld arrangement and additionally with a dovetail arrangement between the guide channel and the body. A facing ring is connected to a stop utilizing a circumferential weld and additionally a bolt inserted through the facing ring and threaded into the stop. The connection between a valve seat and a valve body has a primary weld connection, and additionally, a pin is inserted through the valve seat into a recess in the valve body.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: September 17, 1996
    Assignee: Pacific Valves
    Inventors: Fred R. O'Brien, Jerry E. Martin