Patents by Inventor Robert Rahmfeld

Robert Rahmfeld 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).

  • Hydraulic system for linear drives controlled by a displacer element
    Patent number: 7543449
    Abstract: The invention concerns a hydraulic system for linear drives with a differential cylinder, in particular for mobile machines which through the use of displacement-control of the drives avoids the many and diverse disadvantages of the state of the art and renders possible a precise and energy-efficient control of linear drives with differential cylinders, and which is economical and simple to maintain and which can be well integrated into the total hydraulic system of such machines.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: June 9, 2009
    Assignee: CNH America LLC
    Inventors: Monika Ivantysynova, Robert Rahmfeld, Erik Lautner, Jurgen Weber
  • Method for controlling a hydraulic system of a mobile working machine
    Patent number: 7386978
    Abstract: A method is described for controlling a hydraulic system, particularly of mobile working machine, with at least one internal combustion engine driving at least one hydraulic pump with adjustable volumetric displacement and possibly additional fixed-displacement pumps.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: June 17, 2008
    Assignee: CNH America LLC
    Inventors: Monika Ivantysynova, Robert Rahmfeld, Jürgen Weber
  • Hydraulic system for linear drives controlled by a displacer element
    Publication number: 20060218913
    Abstract: The invention concerns a hydraulic system for linear drives with a differential cylinder, in particular for mobile machines which through the use of displacement-control of the drives avoids the many and diverse disadvantages of the state of the art and renders possible a precise and energy-efficient control of linear drives with differential cylinders, and which is economical and simple to maintain and which can be well integrated into the total hydraulic system of such machines.
    Type: Application
    Filed: January 14, 2004
    Publication date: October 5, 2006
    Inventors: Monika Ivantysynova, Robert Rahmfeld, Erik Lautner, Jurgen Weber
  • Method for controlling a hydraulic system of a mobile working machine
    Publication number: 20060182636
    Abstract: A method is described for controlling a hydraulic system, particularly of mobile working machine, with at least one internal combustion engine driving at least one hydraulic pump with adjustable volumetric displacement and possibly additional fixed-displacement pumps
    Type: Application
    Filed: February 4, 2004
    Publication date: August 17, 2006
    Inventors: Monika Ivantysynova, Robert Rahmfeld, Jurgen Weber