Patents by Inventor Stefan ROEHMANN

Stefan ROEHMANN 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).

  • Safety switching device with a safe power supply unit
    Patent number: 9923359
    Abstract: A safety switching device for an automated installation includes a power supply unit for providing at least one operating voltage for the device. The power supply unit receives an input voltage via a feed line and provides a defined output voltage on an output side. Electrical supply to the power supply unit is interrupted if an instantaneous output voltage is higher than the defined output voltage. The interruption is achieved by first and second switching elements arranged in series and connecting the input of the power supply unit to ground, and by an interrupter element in the feed line. The interrupter element triggers when both the first and the second switching elements are in a closed, low-impedance state.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: March 20, 2018
    Assignee: PILZ GMBH & CO. KG
    Inventors: Sebastian Richter, Kim Le, Stefan Roehmann
  • SAFETY SWITCHING DEVICE WITH A SAFE POWER SUPPLY UNIT
    Publication number: 20150340854
    Abstract: A safety switching device for an automated installation includes a power supply unit for providing at least one operating voltage for the device. The power supply unit receives an input voltage via a feed line and provides a defined output voltage on an output side. Electrical supply to the power supply unit is interrupted if an instantaneous output voltage is higher than the defined output voltage. The interruption is achieved by first and second switching elements arranged in series and connecting the input of the power supply unit to ground, and by an interrupter element in the feed line. The interrupter element triggers when both the first and the second switching elements are in a closed, low-impedance state.
    Type: Application
    Filed: July 30, 2015
    Publication date: November 26, 2015
    Inventors: Sebastian RICHTER, Kim LE, Stefan ROEHMANN