Patents by Inventor Robert KRUTZ

Robert KRUTZ 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).

  • Device and method for weighing a ballast on a crane and corresponding crane
    Patent number: 11542125
    Abstract: The invention relates to an apparatus for ballast weighing on a crane, comprising at least two ballasting cylinders that are equipped to lift/lower the ballast and that each comprise at least one pressure transducer in the region of the piston and/or rod side, and comprising at least one evaluation unit that is equipped to calculate the mass moved by the ballasting cylinders from the pressures detected by the pressure transducers on retraction and/or extension of the ballasting cylinders, excluding the friction forces occurring in the ballasting cylinders. The invention furthermore is directed to a method for calculating the ballast weight of a crane by means of a corresponding apparatus.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: January 3, 2023
    Assignee: LIEBHERR-WERK EHINGEN GMBH
    Inventors: Robert Krutz, Hans-Dieter Willim
  • DEVICE AND METHOD FOR WEIGHING A BALLAST ON A CRANE AND CORRESPONDING CRANE
    Publication number: 20190389700
    Abstract: The invention relates to an apparatus for ballast weighing on a crane, comprising at least two ballasting cylinders that are equipped to lift/lower the ballast and that each comprise at least one pressure transducer in the region of the piston and/or rod side, and comprising at least one evaluation unit that is equipped to calculate the mass moved by the ballasting cylinders from the pressures detected by the pressure transducers on retraction and/or extension of the ballasting cylinders, excluding the friction forces occurring in the ballasting cylinders. The invention furthermore is directed to a method for calculating the ballast weight of a crane by means of a corresponding apparatus.
    Type: Application
    Filed: February 15, 2018
    Publication date: December 26, 2019
    Inventors: Robert KRUTZ, Hans-Dieter WILLIM
  • Automatic erection of a crane
    Patent number: 10138096
    Abstract: The present invention relates to a process for the automatic movement of the boom system of a crane, in particular a mobile crane, with at least two boom elements. The process includes the following steps: measuring of at least one control parameter and in particular automatic actuation of at least one drive of the boom system depending on the measured control parameter.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: November 27, 2018
    Assignee: Liebherr-Werk Ehingen GmbH
    Inventors: Nikolaus Muench, Robert Krutz
  • AUTOMATIC ERECTION OF A CRANE
    Publication number: 20160221799
    Abstract: The present invention relates to a process for the automatic movement of the boom system of a crane, in particular a mobile crane, with at least two boom elements. The process includes the following steps: measuring of at least one control parameter and in particular automatic actuation of at least one drive of the boom system depending on the measured control parameter.
    Type: Application
    Filed: August 19, 2015
    Publication date: August 4, 2016
    Inventors: Nikolaus MUENCH, Robert KRUTZ