Patents by Inventor Jan Kroepelin

Jan Kroepelin 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).

  • Central valve for pivot motor actuator
    Patent number: 9322419
    Abstract: A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: April 26, 2016
    Assignee: Hilite Germany GmbH
    Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze, Juergen Goll
  • Central valve for pivot motor actuator
    Patent number: 9194506
    Abstract: The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: November 24, 2015
    Assignee: Hilite Germany GmbH
    Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze
  • CENTRAL VALVE FOR PIVOT MOTOR ACTUATOR
    Publication number: 20140311594
    Abstract: The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze
  • CENTRAL VALVE FOR PIVOT MOTOR ACTUATOR
    Publication number: 20140311333
    Abstract: A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 23, 2014
    Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze, Juergen Goll