Patents by Inventor Christoph Guhl

Christoph Guhl 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).

  • Method for manufacturing a piston rod unit and a hollow shaft
    Patent number: 11841034
    Abstract: A piston rod unit and a method for producing a piston rod unit, or a shaft, in light-weight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: December 12, 2023
    Assignee: LIEBHERR-COMPONENTS KIRCHDORF GMBH
    Inventors: Christoph Guhl, Bernhard Müller
  • METHOD FOR MANUFACTURING A PISTON ROD UNIT AND A HOLLOW SHAFT
    Publication number: 20220120296
    Abstract: A piston rod unit and a method for producing a piston rod unit, or a shaft, in light-weight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
    Type: Application
    Filed: November 3, 2021
    Publication date: April 21, 2022
    Inventors: Christoph GUHL, Bernhard MÜLLER
  • Method for manufacturing a piston rod unit and a hollow shaft
    Patent number: 11193511
    Abstract: The invention relates to a method for producing a piston rod unit, or a shaft, in lightweight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: December 7, 2021
    Assignee: LIEBHERR-COMPONENTS KIRCHDORF GMBH
    Inventors: Christoph Guhl, Bernhard Müller
  • METHOD FOR MANUFACTURING A PISTOL ROD UNIT AND A HOLLOW SHAFT
    Publication number: 20190186507
    Abstract: The invention relates to a method for producing a piston rod unit, or a shaft, in light-weight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
    Type: Application
    Filed: June 21, 2017
    Publication date: June 20, 2019
    Applicant: LIEBHERR-COMPONENTS KIRCHDORF GMBH
    Inventors: Christoph GUHL, Bernhard MÜLLER
  • Tool for screwing a piston onto the piston rod of a hydraulic cylinder and hydraulic cylinder
    Patent number: 8402879
    Abstract: The present invention relates to a tool for screwing a piston onto the piston rod of a hydraulic cylinder, in particular of a hydraulic cylinder with a piston diameter of more than 200 mm, comprising a first tool element with connecting elements for releasable connection with the piston and a second tool element with connecting elements for releasable connection with the piston rod, which is rotatable with respect to the first tool element, wherein the torque necessary for screwing together piston and piston rod can be applied onto the piston and the piston rod via the connecting elements by rotating the first tool element against the second tool element.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: March 26, 2013
    Assignee: Liebherr-Hydraulikbagger GmbH
    Inventors: Hans-Peter Lavergne, Ralph Soell, Christoph Guhl
  • Tool for Screwing a Piston onto the Piston Rod of a Hydraulic Cylinder and Hydraulic Cylinder
    Publication number: 20100018083
    Abstract: The present invention relates to a tool for screwing a piston onto the piston rod of a hydraulic cylinder, in particular of a hydraulic cylinder with a piston diameter of more than 200 mm, comprising a first tool element with connecting elements for releasable connection with the piston and a second tool element with connecting elements for releasable connection with the piston rod, which is rotatable with respect to the first tool element, wherein the torque necessary for screwing together piston and piston rod can be applied onto the piston and the piston rod via the connecting elements by rotating the first tool element against the second tool element.
    Type: Application
    Filed: June 24, 2009
    Publication date: January 28, 2010
    Applicant: Liebherr-Hydraulikbagger GmbH
    Inventors: Hans-Peter Lavergne, Ralph Söll, Christoph Guhl