Patents by Inventor Robert GRAU

Robert GRAU 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: 11970833
    Abstract: The invention relates to a quick coupling for coupling a tool to the boom of a working machines, comprising a quick coupling part at the boom side and a quick coupling part at the tool side that are latchable to one another via two spaced apart latching axles and an energy circuit coupling for the automatic coupling of an energy connector at the tool side and an energy connector at the boom side that comprises an energy coupling part at the boom side and an energy coupling part at the tool side that move toward one another by pivoting together about a first latching axle on an orbit and thereby automatically couple with one another. At least one of the energy coupling parts is movably supported. The energy circuit coupling comprises a linear guide that compensates the circular relative movement of the energy coupling parts on the pivoting together and guides them linearly toward one another.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: April 30, 2024
    Assignee: LIEBHERR-HYDRAULIKBAGGER GMBH
    Inventors: Thomas Zitterbart, Robert Grau
  • Publication number: 20210324600
    Abstract: The invention relates to a quick coupling for coupling a tool to the boom of a working machines, comprising a quick coupling part at the boom side and a quick coupling part at the tool side that are latchable to one another via two spaced apart latching axles and an energy circuit coupling for the automatic coupling of an energy connector at the tool side and an energy connector at the boom side that comprises an energy coupling part at the boom side and an energy coupling part at the tool side that move toward one another by pivoting together about a first latching axle on an orbit and thereby automatically couple with one another. At least one of the energy coupling parts is movably supported. The energy circuit coupling comprises a linear guide that compensates the circular relative movement of the energy coupling parts on the pivoting together and guides them linearly toward one another.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 21, 2021
    Inventors: Thomas ZITTERBART, Robert GRAU