Patents by Inventor Josef Hessdoerfer

Josef Hessdoerfer 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 system
    Patent number: 8464758
    Abstract: The invention relates to a valve arrangement with a continuously variable directional control valve, wherein the valve slide thereof can be adjusted in the direction of five positions in order to control a user in two directions, to carry out a quick motion, to switch into a floating position or to close off the pressure means connection to the user (neutral position).
    Type: Grant
    Filed: November 8, 2008
    Date of Patent: June 18, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Alfred Breunig, Josef Hessdoerfer, Walter Kirsch
  • Control device and hydraulic pilot control
    Patent number: 8322375
    Abstract: A control device for controlling a hydraulic consumer, is equipped with a distributing valve having a control pressure chamber and a control slide that can be displaced against the force of a spring by the build-up of a control pressure in the control pressure chamber. A pilot control valve controls the supply and discharge of control fluid into and out of the control pressure chamber. A release device is used to drive the control fluid out of the control pressure chamber, bypassing the pilot control valve.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: December 4, 2012
    Assignees: Robert Bosch GmbH, Liebherr France SAS
    Inventors: Frank Helbling, Günter Fertig, Albrecht Kessler, Josef Hessdörfer, Burkhard Knöll
  • VALVE SYSTEM
    Publication number: 20100269935
    Abstract: The invention relates to a valve arrangement with a continuously variable directional control valve, wherein the valve slide thereof can be adjusted in the direction of five positions in order to control a user in two directions, to carry out a quick motion, to switch into a floating position or to close off the pressure means connection to the user (neutral position).
    Type: Application
    Filed: November 8, 2008
    Publication date: October 28, 2010
    Inventors: Alfred Breunig, Josef Hessdoerfer, Walter Kirsch