Patents by Inventor Jan Olav Pettersen

Jan Olav Pettersen 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).

  • Sub sea hybrid valve actuator system and method
    Patent number: 8596608
    Abstract: A sub sea valve actuator system including a piston and cylinder assembly and a return spring arranged in an actuator housing, a hydraulic pump and electric motor assembly associated with the piston and cylinder assembly, and hydraulic flow lines for hydraulic medium driving the piston and cylinder in relative displacement against a force of the return spring. The valve actuator system includes a detector configured to detect an end-of-stroke position of the piston and cylinder assembly. The detector includes at least one of: a motor current monitoring circuit unit, a hydraulic medium pressure sensor unit, a position sensor unit, and a linear variable differential transformer unit. An electromechanical arresting mechanism is arranged to be energized for releasably arresting the return spring in a compressed state in result of the detected end-of-stroke position.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: December 3, 2013
    Assignee: Veteo Gray Scandinavia AS
    Inventors: Tom Grimseth, Christian Borchgrevink, Jon Flidh, Jan Olav Pettersen
  • SUB SEA HYBRID VALVE ACTUATOR SYSTEM AND METHOD
    Publication number: 20110126912
    Abstract: A sub sea valve actuator system including a piston and cylinder assembly and a return spring arranged in an actuator housing, a hydraulic pump and electric motor assembly associated with the piston and cylinder assembly, and hydraulic flow lines for hydraulic medium driving the piston and cylinder in relative displacement against a force of the return spring. The valve actuator system includes a detector configured to detect an end-of-stroke position of the piston and cylinder assembly. The detector includes at least one of: a motor current monitoring circuit unit, a hydraulic medium pressure sensor unit, a position sensor unit, and a linear variable differential transformer unit. An electromechanical arresting mechanism is arranged to be energized for releasably arresting the return spring in a compressed state in result of the detected end-of-stroke position.
    Type: Application
    Filed: May 12, 2009
    Publication date: June 2, 2011
    Applicant: Vetcp Gray Scandinavia AS
    Inventors: Tom Grimseth, Christian Borchgrevink, Jon Flidh, Jan Olav Pettersen