Patents by Inventor Rolf WIRFS

Rolf WIRFS 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).

  • Energy supply device and construction machine
    Patent number: 12149076
    Abstract: An energy supply device for supplying electric loads with electric energy, includes a DC link; a first mains connection to which a first AC voltage grid can be connected as intended; a first rectifier which is designed to rectify an AC voltage corresponding to an AC voltage across the first mains connection or based thereon and to feed the rectified voltage into the DC link; a second mains connection to which a second AC voltage grid can be connected as intended; a second rectifier which is designed to rectify an AC voltage corresponding to an AC voltage across the second mains connection or based thereon; a controllable DC-to-DC converter to a first side of which a voltage rectified by means of the second rectifier is applied, and a second side of which is connected to the DC link; a first current converter which is fed from the DC link and is designed to supply a first electric load with electric energy; a power measuring apparatus which is designed to measure electric power consumed at the first mains conn
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: November 19, 2024
    Assignees: Putzmeister Engineering GmbH, REFU Drive GmbH
    Inventors: Rolf Wirfs, Georg Dielmann, Johannes Demling, Sebastian Kerner, Christian Ziemens, Werner Tausch
  • Energy Supply Device and Construction Machine
    Publication number: 20240063638
    Abstract: An energy supply device for supplying electric loads with electric energy, includes a DC link; a first mains connection to which a first AC voltage grid can be connected as intended; a first rectifier which is designed to rectify an AC voltage corresponding to an AC voltage across the first mains connection or based thereon and to feed the rectified voltage into the DC link; a second mains connection to which a second AC voltage grid can be connected as intended; a second rectifier which is designed to rectify an AC voltage corresponding to an AC voltage across the second mains connection or based thereon; a controllable DC-to-DC converter to a first side of which a voltage rectified by means of the second rectifier is applied, and a second side of which is connected to the DC link; a first current converter which is fed from the DC link and is designed to supply a first electric load with electric energy; a power measuring apparatus which is designed to measure electric power consumed at the first mains conn
    Type: Application
    Filed: December 6, 2021
    Publication date: February 22, 2024
    Inventors: Rolf WIRFS, Georg DIELMANN, Johannes DEMLING, Sebastian KERNER, Christian ZIEMENS, Werner TAUSCH