Patents by Inventor Hans-Joachim Waegner

Hans-Joachim Waegner 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).

  • Patent number: 6685277
    Abstract: A method and apparatus for braking a revolvable superstructure of a working machine by counter-steering. A working machine has a superstructure which is driven by a motor via a transmission. A control lever operates a control valve which sends signals to a pivoting pump. The control lever has at least one neutral position and at least two switching positions. When the control lever is moved to a braking position, a switching logic circuit coupled to the pivoting pump is actuated and reverses the pivoting pump. This reverses the direction of revolution of the superstructure and brakes the revolution of the superstructure by counter-steering. A monitoring device coupled to the switching logic circuit monitors the number of revolutions of the superstructure. The braking is stopped when the monitoring device detects that the superstructure has come to a standstill.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: February 3, 2004
    Assignee: O&K Orenstein & Koppel Aktiengesellschaft
    Inventors: Horst Kohlmorgen, Hans-Joachim Waegner, Ulrich Krüger