Patents by Inventor Jonathan Tresadern

Jonathan Tresadern 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).

  • Control arrangement
    Patent number: 9303661
    Abstract: A control arrangement for use in a hydraulic control system including a control valve having at least two movable elements, such as spools or poppets, that is adapted to control a main flow through the control valve. The control arrangement further includes a control unit. In an embodiment the control arrangement is adapted to control the operation of the control valve in accordance with a first control scheme, monitor an operating parameter of the control system, and control the operation of the control valve in accordance with a second control scheme in the event that the value of the operating parameter falls outside of a predetermined range.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: April 5, 2016
    Assignee: EATON LIMITED
    Inventors: Christian Fagerlund, Jonathan Tresadern
  • CONTROL ARRANGEMENT
    Publication number: 20120279212
    Abstract: A control arrangement for use in a hydraulic control system including a control valve having at least two movable elements. The control arrangement is configured to control the positions of the two movable elements such that fluid from a common fluid pressure source is applied to both of the control surfaces of an actuator to drive the actuator. In an embodiment, the control surfaces have different effective areas.
    Type: Application
    Filed: July 2, 2010
    Publication date: November 8, 2012
    Applicant: ULTRONICS LIMITED
    Inventors: Christian Fagerlund, Jonathan Tresadern
  • CONTROL ARRANGEMENT
    Publication number: 20120181459
    Abstract: A control arrangement for use in a hydraulic control system including a control valve having at least two movable elements, such as spools or poppets, that is adapted to control a main flow through the control valve. The control arrangement further includes a control unit. In an embodiment the control arrangement is adapted to control the operation of the control valve in accordance with a first control scheme, monitor an operating parameter of the control system, and control the operation of the control valve in accordance with a second control scheme in the event that the value of the operating parameter falls outside of a predetermined range.
    Type: Application
    Filed: July 20, 2010
    Publication date: July 19, 2012
    Applicant: Ultronics Limited
    Inventors: Christian Fagerlund, Jonathan Tresadern