Patents by Inventor Martin Ekstrand

Martin Ekstrand 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).

  • Hydraulic valve arrangement
    Patent number: 11231053
    Abstract: The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve having a first valve member that is displaceable in a first and a second axial direction for controlling direction of supply and discharge of hydraulic fluid to and from a hydraulic actuator, a first proportional electro-hydraulic control valve for controlling displacement of the first valve member in the first axial direction, a second proportional electro-hydraulic control valve for controlling displacement of the first valve member in the second axial direction, and a second pilot operated proportional control valve having a second valve member configured to be controlled by the first and second proportional electro-hydraulic control valves via a shuttle valve arrangement.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: January 25, 2022
    Assignee: Parker Hannifin EMEA S.à.r.l.
    Inventors: Björn Eriksson, Martin Ekstrand
  • A HYDRAULIC VALVE ARRANGEMENT
    Publication number: 20210254637
    Abstract: The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve having a first valve member that is displaceable in a first and a second axial direction for controlling direction of supply and discharge of hydraulic fluid to and from a hydraulic actuator, a first proportional electro-hydraulic control valve for controlling displacement of the first valve member in the first axial direction, a second proportional electro-hydraulic control valve for controlling displacement of the first valve member in the second axial direction, and a second pilot operated proportional control valve having a second valve member configured to be controlled by the first and second proportional electro-hydraulic control valves via a shuttle valve arrangement.
    Type: Application
    Filed: June 11, 2019
    Publication date: August 19, 2021
    Inventors: Björn ERIKSSON, Martin Ekstrand