Patents by Inventor Josef LIFKA

Josef LIFKA 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).

  • Processing tool, particularly a roll tool, and method of processing a cylindrical sliding surface
    Patent number: 10946497
    Abstract: Processing tool for processing a surface of a workpiece. The processing tool includes a tool body which defines a tool axis. At least one first roll element, which is borne by the tool body, is rotatable around a first roll element axis and has a first outer surface with a rough surface structure in at least one first working section configured for rolling contact with the workpiece surface. Further, at least one second roll element, which is borne by the tool body, is rotatable about a second roll element axis and has a second outer surface that, in at least one second working section configured for a rolling contact with the workpiece surface, has a distance (r2) to the tool axis, which is less than a distance (r1) of the at least one first working section to the tool axis.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: March 16, 2021
    Assignee: HOFFMANN GMBH QUALITÄTSWERKZEUGE
    Inventors: Martin Barth, Jürgen Lukas, Josef Lifka
  • Apparatus for processing cylinder walls of internal combustion engines
    Patent number: 10493538
    Abstract: The invention relates to an apparatus for processing cylinder walls of internal combustion engines (1), including a cutting element (4). The cutting element (4) is arranged on a rotary cutting ring (3). The cutting element (4) has a slit contour (5) with a plurality of cutting edges (6) arranged next to each other in a direction of an axis of rotation of the rotary cutting ring. And, the individual cutting edges (6) face in a direction of rotation of the rotary cutting ring.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 3, 2019
    Assignee: Hoffmann GmbH Qualitätswerkzeuge
    Inventor: Josef Lifka
  • APPARATUS FOR PROCESSING CYLINDER WALLS OF INTERNAL COMBUSTION ENGINES
    Publication number: 20180229314
    Abstract: The invention relates to an apparatus for processing cylinder walls of internal combustion engines (1), including a cutting element (4). The cutting element (4) is arranged on a rotary cutting ring (3). The cutting element (4) has a slit contour (5) with a plurality of cutting edges (6) arranged next to each other in a direction of an axis of rotation of the rotary cutting ring. And, the individual cutting edges (6) face in a direction of rotation of the rotary cutting ring.
    Type: Application
    Filed: February 2, 2018
    Publication date: August 16, 2018
    Inventor: Josef LIFKA
  • PROCESSING TOOL, PARTICULARLY A ROLL TOOL, AND METHOD OF PROCESSING A CYLINDRICAL SLIDING SURFACE
    Publication number: 20180015591
    Abstract: Processing tool for processing a surface of a workpiece. The processing tool includes a tool body which defines a tool axis. At least one first roll element, which is borne by the tool body, is rotatable around a first roll element axis and has a first outer surface with a rough surface structure in at least one first working section configured for rolling contact with the workpiece surface. Further, at least one second roll element, which is borne by the tool body, is rotatable about a second roll element axis and has a second outer surface that, in at least one second working section configured for a rolling contact with the workpiece surface, has a distance (r2) to the tool axis, which is less than a distance (r1) of the at least one first working section to the tool axis.
    Type: Application
    Filed: July 11, 2017
    Publication date: January 18, 2018
    Applicant: Hoffmann GmbH Qualitaetswerkzeuge
    Inventors: Martin BARTH, Juergen LUKAS, Josef LIFKA