Patents by Inventor Leonard Medill

Leonard Medill 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).

  • Local position indicator for subsea isolation valve having no external position indication
    Patent number: 10371284
    Abstract: A local position indicating device for a subsea isolation valve that has no other visual signals of its position integrates to the hydraulic actuation system for the isolation valve. Three way valves, connected to an operating control line and a force closed balance line leading to opposed ends of an operating piston, are located by the isolation valve and redirected by a diver or ROV, to locally operate the valve. The balance line has a piston that is displaced with fluid pushed by the operating piston when the isolation valve is opened with hydraulic pressure in the operating control line local connection. The piston connected to the balance line moves an indicator out of its housing for the local indication that the isolation valve is open. Displaced fluid from movement of the piston in the position indicator moves a floating piston to keep seawater away from the indicating piston.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: August 6, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Wade A. Miller, Michael L. Hair, Leonard Medill
  • Local Position Indicator for Subsea Isolation Valve Having No External Position Indication
    Publication number: 20170234454
    Abstract: A local position indicating device for a subsea isolation valve that has no other visual signals of its position integrates to the hydraulic actuation system for the isolation valve. Three way valves, connected to an operating control line and a force closed balance line leading to opposed ends of an operating piston, are located by the isolation valve and redirected by a diver or ROV, to locally operate the valve. The balance line has a piston that is displaced with fluid pushed by the operating piston when the isolation valve is opened with hydraulic pressure in the operating control line local connection. The piston connected to the balance line moves an indicator out of its housing for the local indication that the isolation valve is open. Displaced fluid from movement of the piston in the position indicator moves a floating piston to keep seawater away from the indicating piston.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 17, 2017
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Wade A. Miller, Michael L. Hair, Leonard Medill