Patents by Inventor Karsten Buhr

Karsten Buhr 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).

  • Publication number: 20230407580
    Abstract: An earth working machine encompasses a machine body having a machine frame and a drive configuration rotationally drivable relative to the machine frame around a drive axis (A). It further encompasses a working apparatus (32) for earth working to which the drive configuration is releasably connected in drive torque-transferring fashion for rotation together, the drive configuration projecting from an axial end axially into the working apparatus (32) and the working apparatus (32) being retained on the drive configuration, against axial displacement relative to the drive configuration, by an accessible central bolt arrangement having a bolt axis collinear with the drive axis (A).
    Type: Application
    Filed: June 26, 2023
    Publication date: December 21, 2023
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Publication number: 20230323614
    Abstract: An earth working machine includes support structure and a working assembly mounted on the support structure so as to be rotatable about a drive axis. An assembly-side bearing configuration is connected to the working assembly and a structure-side bearing configuration is connected to the support structure. The assembly-side bearing configuration includes a driver configuration having a driver surface facing in a first circumferential direction and the structure-side bearing configuration includes a driver counterpart configuration having a driver counterpart surface facing in a second circumferential direction opposite to the first, the movement spaces of the driver surface and of the driver counterpart surface about the drive axis overlapping one another.
    Type: Application
    Filed: April 14, 2023
    Publication date: October 12, 2023
    Inventors: Hardy Wilhelmi, Karsten Buhr, Andreas Salz, Sascha Spöth
  • Patent number: 11725351
    Abstract: A bearing component for mounting a replaceable milling drum on an earth working machine includes an annular connecting flange having a central axis. A bearing stem protrudes from the connecting flange axially in a first direction to a first axial end, the bearing stem having an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other. The bearing stem further includes a centering recess open at a second axial end opposite the first axial end, the centering recess including an opening angle decreasing in steps so that the centering recess tapers in the first direction, the centering recess forming a portion of the central opening.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: August 15, 2023
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Patent number: 11655598
    Abstract: An earth working machine includes a support structure and a working assembly mounted on the support structure so as to be rotatable about a drive axis. An assembly-side bearing configuration is connected to the working assembly and a structure-side bearing configuration is connected to the support structure. The assembly-side bearing configuration includes a driver configuration having a driver surface facing in a first circumferential direction and the structure-side bearing configuration includes a driver counterpart configuration having a driver counterpart surface facing in a second circumferential direction opposite to the first, the movement spaces of the driver surface and of the driver counterpart surface about the drive axis overlapping one another.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: May 23, 2023
    Inventors: Hardy Wilhelmi, Karsten Buhr, Andreas Salz, Sascha Spöth
  • Publication number: 20220389670
    Abstract: An earth working machine encompasses a machine body having a machine frame and a drive configuration rotationally drivable relative to the machine frame around a drive axis (A). It further encompasses a working apparatus (32) for earth working to which the drive configuration is releasably connected in drive torque-transferring fashion for rotation together, the drive configuration projecting from an axial end axially into the working apparatus (32) and the working apparatus (32) being retained on the drive configuration, against axial displacement relative to the drive configuration, by an accessible central bolt arrangement having a bolt axis collinear with the drive axis (A).
    Type: Application
    Filed: April 19, 2022
    Publication date: December 8, 2022
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Patent number: 11313087
    Abstract: A replaceable milling drum for an earth working machine includes a milling drum tube and a protrusion structure fixed to the milling drum tube. A bearing stem protrudes from the protrusion structure axially away from a drive axial end of the milling drum tube. The bearing stem has an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the drive axial end having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the drive axial end, the bearing stem having a central opening therethrough co-axial with the drive axis.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: April 26, 2022
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Publication number: 20210269994
    Abstract: The present invention relates to an earth working machine (10), comprising a support structure (30) and a working assembly (28) mounted on the support structure (30) so as to be rotatable about a drive axis (A), the working assembly (28) being rotatably supported by a first rotary bearing (57) and by a rotary bearing arrangement (77), the rotary bearing arrangement (77) comprising a second rotary bearing (76), an assembly-side bearing configuration (74a) connected to the working assembly (28) and a structure-side bearing configuration (86) connected to the support structure (30), both the assembly-side bearing configuration (74a) as well as the structure-side bearing configuration (86) being situated so as to be rotatable about the drive axis (A) relative to the second support structure area (30a) in the reference state, and both the assembly-side as well as the structure-side bearing configuration (74a, 86) being designed to be axially removable from one another and thereby separable from one another for mai
    Type: Application
    Filed: February 9, 2021
    Publication date: September 2, 2021
    Inventors: Hardy Wilhelmi, Karsten Buhr, Andreas Salz, Sascha Spöth
  • Patent number: 10968577
    Abstract: The invention relates to a tool combination consisting of a chisel holder, which can be fastened to a milling drum of a soil tillage machine, and at least one leading and one trailing chisel, which are retained on the chisel holder, wherein the trailing chisel is arranged after the leading chisel, based on a working movement of the tool combination in use in the soil tillage machine, and wherein each chisel has a chisel tip having a cutter. According to the invention the trailing chisel tip of the trailing chisel has, at least in some areas, a greater hardness than the leading chisel tip of the leading chisel. Thus stoppage times of the soil tillage machine for maintenance can be reduced and the loss of chisels can at least be decreased.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: April 6, 2021
    Inventors: Karsten Buhr, Andreas Jost, Thomas Lehnert, Sebastian Hofrath, Martin Lenz
  • Patent number: 10968740
    Abstract: The invention relates to an interchangeable chisel holder (40) which can be fixed to a milling drum (15) of a ground-working machine (10), having a forward chisel holder (42) for the interchangeable holding of a forward chisel (20), preferably a round-shaft chisel, and having a rearward chisel (30, 31), which is held on the interchangeable chisel holder (40), wherein, as based on a working movement (76) of the interchangeable chisel holder (40) when used in the ground-working machine (10), the rearward chisel (30, 31) is arranged behind the forward chisel holder (42). In such an interchangeable candleholder (40) provision can be made, according to the invention, for the rearward chisel (30, 31) to be held on the interchangeable chisel holder (40) axially and fixed in the circumferential direction of the chisel holder. Maintenance-induced stoppages of the ground-working machine can thus be reduced and the loss of chisels can at least be lowered.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: April 6, 2021
    Inventors: Karsten Buhr, Andreas Jost, Thomas Lehnert, Sebastian Hofrath, Martin Lenz
  • Publication number: 20200407927
    Abstract: An earth working machine encompasses a machine body having a machine frame and a drive configuration rotationally drivable relative to the machine frame around a drive axis (A). It further encompasses a working apparatus (32) for earth working to which the drive configuration is releasably connected in drive torque-transferring fashion for rotation together, the drive configuration projecting from an axial end axially into the working apparatus (32) and the working apparatus (32) being retained on the drive configuration, against axial displacement relative to the drive configuration, by an accessible central bolt arrangement having a bolt axis collinear with the drive axis (A).
    Type: Application
    Filed: July 20, 2020
    Publication date: December 31, 2020
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Patent number: 10801322
    Abstract: The invention relates to a cutting device for an earth working machine, having improved wear protection.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: October 13, 2020
    Assignees: Betek GmbH & Co. KG, Wirtgen GmbH
    Inventors: Thomas Allgaier, Ulrich Krämer, Heiko Friederichs, Thomas Lehnert, Karsten Buhr, Cyrus Barimani
  • Patent number: 10724187
    Abstract: An earth working machine (10) includes a machine body (13) having a machine frame (12) and a drive configuration (46), rotationally drivable relative to the machine frame (12), and to which configuration a working apparatus (32) embodied for earth working is releasably connected in torque-transferring fashion, in an operating position, for rotation together around a drive axis (A), such that when the connection is released, the working apparatus (32) is removable from the operating position in an axial direction relative to the drive configuration (46) for deinstallation from the drive configuration (46) and, for installation on the drive configuration (46), is conveyable into the operating position in an axial direction relative to the drive configuration (46), an actuator (65) being provided which is embodied to move the working apparatus (32) out of the operating position when the connection is released.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: July 28, 2020
    Assignee: Wirtgen GmbH
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Patent number: 10724186
    Abstract: An earth working machine (10) includes a machine body (13) having a machine frame (12) and a drive configuration (46), rotationally drivable relative to the machine frame (12) around a drive axis (A), to which configuration a working apparatus (32) embodied for earth working is releasably connected in torque-transferring fashion, in an operating position operational for earth working, for rotation together around the drive axis (A), such that when the connection is released, the working apparatus (32) is removable from the operating position in an axial direction relative to the drive configuration (46) for deinstallation from the drive configuration (46) and, for installation on the drive configuration, is conveyable into the operating position in an axial direction relative to the drive configuration (46).
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: July 28, 2020
    Assignee: Wirtgen GmbH
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Patent number: 10724188
    Abstract: An earth working machine includes a drive configuration and a working apparatus releasably connected together by a bolt component. A bolting moment bracing arrangement is connected or connectable in bolting moment-transferring fashion to the bolt component, and includes a bracing region that is embodied for bolting moment-bracing abutment in a bracing bolting direction against a counterpart bracing region, the drive configuration being embodied to be driven to rotate, in a rotation direction codirectional with the bracing bolting direction, while the bracing region is in abutment against the counterpart bracing region.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: July 28, 2020
    Assignee: Wirtgen GmbH
    Inventors: Christian Berning, Karsten Buhr, Markus Frankemölle, Thomas Lehnert, Andreas Salz, Hardy Wilhelmi
  • Publication number: 20190338639
    Abstract: The invention relates to an interchangeable chisel holder (40) which can be fixed to a milling drum (15) of a ground-working machine (10), having a forward chisel holder (42) for the interchangeable holding of a forward chisel (20), preferably a round-shaft chisel, and having a rearward chisel (30, 31), which is held on the interchangeable chisel holder (40), wherein, as based on a working movement (76) of the interchangeable chisel holder (40) when used in the ground-working machine (10), the rearward chisel (30, 31) is arranged behind the forward chisel holder (42). In such an interchangeable candleholder (40) provision can be made, according to the invention, for the rearward chisel (30, 31) to be held on the interchangeable chisel holder (40) axially and fixed in the circumferential direction of the chisel holder.
    Type: Application
    Filed: November 30, 2017
    Publication date: November 7, 2019
    Inventors: Karsten Buhr, Andreas Jost, Thomas Lehnert, Sebastian Hofrath, Martin Lenz
  • Publication number: 20190316304
    Abstract: The invention relates to a tool combination consisting of a chisel holder, which can be fastened to a milling drum of a soil tillage machine, and at least one leading and one trailing chisel, which are retained on the chisel holder, wherein the trailing chisel is arranged after the leading chisel, based on a working movement of the tool combination in use in the soil tillage machine, and wherein each chisel has a chisel tip having a cutter. According to the invention the trailing chisel tip of the trailing chisel has, at least in some areas, a greater hardness than the leading chisel tip of the leading chisel. Thus stoppage times of the soil tillage machine for maintenance can be reduced and the loss of chisels can at least be decreased.
    Type: Application
    Filed: November 30, 2017
    Publication date: October 17, 2019
    Inventors: Karsten Buhr, Andreas Jost, Thomas Lehnert, Sebastian Hofrath, Martin Lenz
  • Patent number: 10407850
    Abstract: The invention relates to an ejector unit, in particular for a road milling machine, having an ejector that is replaceably mounted on a carrier. In one aspect the ejector is curved in a scoop-like fashion. In another aspect the ejector is reversible upon the carrier to allow the ejector to be reversed after one wear surface is worn, thus presenting a new second wear surface.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: September 10, 2019
    Assignee: Wirtgen GmbH
    Inventors: Karsten Buhr, Stefan Abresch, Thomas Lehnert, Cyrus Barimani
  • Patent number: 10352164
    Abstract: The invention relates to a bit holder having an insertion projection and having a holding projection having a bit receptacle, the insertion projection comprising a bearing segment and the holding projection comprising a supporting segment. In order to allow the bit holder to be braced in permanent and stable fashion with respect to a base part, provision is made according to the present invention that the supporting segment and/or the bearing segment comprise two supporting surfaces and bearing surfaces, respectively, arranged at an angle to one another; and that the longitudinal center axis of the bit receptacle and the longitudinal axis of the insertion projection enclose an obtuse angle.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: July 16, 2019
    Assignee: Wirtgen GmbH
    Inventors: Thomas Lehnert, Karsten Buhr, Cyrus Barimani
  • Patent number: D906385
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: December 29, 2020
    Inventors: Karsten Buhr, Sascha Spöth
  • Patent number: D967209
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: October 18, 2022
    Inventors: Karsten Buhr, Andreas Jost