Patents by Inventor Johannes Kurz

Johannes Kurz 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).

  • Die cushion drive and method for operating a die cushion drive
    Patent number: 9346095
    Abstract: A die cushion drive includes a first pump, operated by a first electrical machine and at least one hydraulic cylinder having first and second chambers, with the first chamber in fluid communication with the first pump. A die cushion mechanically connected to the hydraulic cylinder. During a controlled movement of the die cushion, a pressure regulation and a preliminary control are active, with a second pump being coupled to a second electrical machine. During preliminary control, the second electrical machine is operated as a generator, with a first valve being used as an adjustment element of the pressure regulation.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: May 24, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Frank Knoche, Johannes Kurz, Oleg Schlegel, Stephan Schäufele
  • DIE CUSHION DRIVE AND METHOD FOR OPERATING A DIE CUSHION DRIVE
    Publication number: 20140090441
    Abstract: A die cushion drive includes a first pump, operated by a first electrical machine and at least one hydraulic cylinder having first and second chambers, with the first chamber in fluid communication with the first pump. A die cushion mechanically connected to the hydraulic cylinder. During a controlled movement of the die cushion, a pressure regulation and a preliminary control are active, with a second pump being coupled to a second electrical machine. During preliminary control, the second electrical machine is operated as a generator, with a first valve being used as an adjustment element of the pressure regulation.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 3, 2014
    Applicant: Siemens Aktiengesellschaft
    Inventors: Frank Knoche, Johannes Kurz, Oleg Schlegel, Stephan Schäufele