Patents by Inventor Robert Kent Ohlson

Robert Kent Ohlson 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).

  • Gate valve with lubricated secondary seal
    Patent number: 8408519
    Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: April 2, 2013
    Assignee: Pentair Valves & ControlsUS LP
    Inventors: Robert Kent Ohlson, David L Gambetta, Christopher Eric Cooper, Viet Nguyen
  • Gate valve with lubricated secondary seal
    Patent number: 8056882
    Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: November 15, 2011
    Assignee: Tyco Valves & Controls LP
    Inventors: Robert Kent Ohlson, David L Gambetta, Christopher Eric Cooper
  • GATE VALVE WITH LUBRICATED SECONDARY SEAL
    Publication number: 20100224814
    Abstract: A gate valve includes a pair of opposing housing members, a gate, primary sealing sleeves and a secondary sealing member. The primary sealing sleeves are disposed in each of the housing members. The gate is configured to slidably pass through a transverse gate chamber defined when the housing members are joined together. The secondary sealing member is secured between the housing members and includes at least one passage or aperture configured to allow lubricating fluid to be applied through at least one of the housing members through the secondary sealing member and onto the gate.
    Type: Application
    Filed: March 6, 2009
    Publication date: September 9, 2010
    Applicant: TYCO VALVES & CONTROLS LP
    Inventors: Robert Kent Ohlson, David L. Gambetta, Christopher Eric Cooper