Patents by Inventor Yuejin Gong

Yuejin Gong 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).

  • Valve assembly
    Patent number: 6263909
    Abstract: A valve assembly for a hydraulic discharge device and including a piston displaceable in a bore of a housing of the discharge device against a biasing force and having an outer surface, which sealingly engages an inner wall of the housing bore and blocks a channel opening into the bore so that the piston functions as a slide valve for this channel, the valve assembly further including a valve seat which, together with the piston, forms a seated valve.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: July 24, 2001
    Inventors: Van Doan Nguyen, Yuejin Gong, Randolf Körtge, Hans Jürgen Lauth, Gerhard Overdiek, Willi Parsch, Thomas Nied-Menninger
  • Valve assembly
    Patent number: 5685332
    Abstract: A valve assembly for controlling fluid flow to an actuator, including first and second throttles for controlling partial flows therethrough, which together form a full flow to the actuator and which function indepedently from each other and are formed each by a variable metering orifice, and a flow control valve for controlling fluid flow through the first throttle and including a valve spool and a spring for biasing the valve spool to a position of a maximum predetermined fluid flow through the first throttle.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: November 11, 1997
    Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KG.
    Inventors: Gerhard Overdiek, Yuejin Gong, Randolf Kortge, Hans-Jurgen Lauth, Van Doan Nguyen
  • Valve assembly
    Patent number: 5513672
    Abstract: A valve assembly for controlling volume flow from a discharge device to an actuator and including a discharge throttle, and a flow control valve for controlling flow through the throttle and having a piston, and end portion of which overlaps a channel for returning excess fluid to a suction side of the discharge device and has an end region forming a seated valve preventing leakage past the end region, when the end region completely overlaps the return channel.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: May 7, 1996
    Assignee: LUK Fahrzeug-Hydraulik GmbH & Co. KG
    Inventors: Van Doan Nguyen, Yuejin Gong, Randolf Kortge, Hans-Jurgen Lauth, Gerhard Overdiek, Willi Parsch, Thomas Nied-Menninger