Bifaced Patents (Class 137/315.3)
  • Valve seat retention pin
    Patent number: 8973897
    Abstract: Embodiments described herein relate to a retention pin for retaining a seat member in the body pocket of a gate valve. Two retention pins may be installed on the outer circumference of the seat member. The seat member is inserted into the body pocket and rotated so that the retention pins are positioned in grooves in the body pocket and the seat member is retained in the body pocket.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: March 10, 2015
    Assignee: Forum US, Inc.
    Inventors: Tony Cordova, Michael Cornelssen
  • Coke drum bottom throttling valve and system
    Patent number: 6843889
    Abstract: A coke drum bottom de-heading system having an internal shroud enclosure and a shroud end cap opened by a flange to a coke bottom de-heading valve capable of accepting the end of a gate valve upon actuation. Acting in coordination with the shroud enclosure to prevent the escape of steam is a gate seal assembly having a gate seal slidably engaged against the sliding gate to prevent the passage of steam thereby.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: January 18, 2005
    Assignee: Curtiss-Wright Flow Control Corporation
    Inventors: Ruben F. Lah, Gary Larsen
  • Valve stem and method of manufacture; improved stem packing
    Patent number: 6488263
    Abstract: A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A valve packing comprises a vertically stacked array comprising alternating metal pressure rings and graphite seals.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: December 3, 2002
    Assignee: T & R Solutions, Inc.
    Inventor: Raoul W. Robert
  • Valve stem and method of manufacturing, improved stem packing
    Patent number: 6250604
    Abstract: A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A valve packing comprises a vertically stacked array comprising alternating metal pressure rings and graphite seals.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: June 26, 2001
    Assignee: T & R Solutions, Inc.
    Inventor: Raoul W. Robert
  • Valve stem and method of manufacture; improved stem packing
    Patent number: 6247679
    Abstract: A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A valve packing comprises a vertically stacked array comprising alternating metal pressure rings and graphite seals.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: June 19, 2001
    Assignee: T&S Solutions, Inc.
    Inventor: Raoul W. Robert