Patents by Inventor Bernd Holl
Bernd Holl 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).
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Patent number: 9157320Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: GrantFiled: September 12, 2012Date of Patent: October 13, 2015Assignee: Wirtgen GmbHInventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter Hähn
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Publication number: 20130000090Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: Wirtgen GmbHInventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter HÄHN
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Patent number: 8286316Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: GrantFiled: April 18, 2012Date of Patent: October 16, 2012Assignee: Wirtgen GmbHInventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter Hähn
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Publication number: 20120198678Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: ApplicationFiled: April 18, 2012Publication date: August 9, 2012Applicant: WIRTGEN GMBHInventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter Hähn
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Patent number: 8181322Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: GrantFiled: May 21, 2009Date of Patent: May 22, 2012Assignee: Wirtgen GmbHInventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter Hähn
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Patent number: 8118369Abstract: In a milling drum (2) for a construction machine, in particular a road milling machine (1) or a recycler, with an interchangeable milling tube (4) arranged coaxially to the axis (20) of the milling drum, where the milling tube (4) is supported, by means of a support ring (8), on a support ring mount (12) of a rotating body coupled to a milling drum drive (16), it is provided that the support ring (8) and the support ring mount (12) of the rotating body display several complementary supporting surfaces (22, 24) arranged coaxially to the axis (20) of the milling drum, where the said supporting surfaces (22, 24) have different supporting circle diameters and are arranged behind one another axially with their diameters decreasing incrementally in the pulling direction.Type: GrantFiled: January 25, 2011Date of Patent: February 21, 2012Assignee: Wirtgen GmbHInventors: Bernd Holl, Stefan Abresch, Thomas Lehnert
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Publication number: 20110115278Abstract: In a milling drum (2) for a construction machine, in particular a road milling machine (1) or a recycler, with an interchangeable milling tube (4) arranged coaxially to the axis (20) of the milling drum, where the milling tube (4) is supported, by means of a support ring (8), on a support ring mount (12) of a rotating body coupled to a milling drum drive (16), it is provided that the support ring (8) and the support ring mount (12) of the rotating body display several complementary supporting surfaces (22, 24) arranged coaxially to the axis (20) of the milling drum, where the said supporting surfaces (22, 24) have different supporting circle diameters and are arranged behind one another axially with their diameters decreasing incrementally in the pulling direction.Type: ApplicationFiled: January 25, 2011Publication date: May 19, 2011Applicant: WIRTGEN GMBHInventors: Bernd Holl, Stefan Abresch, Thomas Lehnert
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Patent number: 7905682Abstract: A road milling machine having a milling roller with a plurality of chisels. A signal receiving unit is assigned to a machine component which is directly or indirectly involved in the milling process or to another machine component. The signal receiving unit detects an operating condition of the machine component and is connected to a signal emitting unit. An optical detecting device may be assigned to the road milling machine, whereby operations are made easier and the milling pattern is optimized.Type: GrantFiled: July 21, 2008Date of Patent: March 15, 2011Assignee: Wirtgen GmbHInventors: Bernd Holl, Kay Heemann, Günter Hähn, Axel Mahlberg
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Patent number: 7901011Abstract: In a milling drum (2) for a construction machine, in particular a road milling machine (1) or a recycler, with an interchangeable milling tube (4) arranged coaxially to the axis (20) of the milling drum, where the milling tube (4) is supported, by means of a support ring (8), on a support ring mount (12) of a rotating body coupled to a milling drum drive (16), it is provided that the support ring (8) and the support ring mount (12) of the rotating body display several complementary supporting surfaces (22, 24) arranged coaxially to the axis (20) of the milling drum, where the said supporting surfaces (22, 24) have different supporting circle diameters and are arranged behind one another axially with their diameters decreasing incrementally in the pulling direction.Type: GrantFiled: March 29, 2007Date of Patent: March 8, 2011Assignee: Wirtgen GmbHInventors: Bernd Holl, Stefan Abresch, Thomas Lehnert
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Patent number: 7784875Abstract: A chisel holder system including a base part and a chisel holder. The base part includes a socket wherein the chisel holder with a plug-in insert is introduced. The chisel holder has a bearing surface supported on a supporting surface of the base plate, and the base part has a shoulder connected to the supporting surface. A replacement chamber is formed between the shoulder and a facing end surface of the chisel holder. According to this invention, the supporting surface is placed in the transition region in relation to the shoulder by at least one recess of the shoulder so that the flat-shaped connection between the supporting surface and the shoulder, in the region of the recess, is interrupted in order to optimize the resistance to wear and tear of the base part.Type: GrantFiled: December 7, 2005Date of Patent: August 31, 2010Assignee: Wirtgen GmbHInventors: Bernd Holl, Dieter Simons
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Publication number: 20090293249Abstract: A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.Type: ApplicationFiled: May 21, 2009Publication date: December 3, 2009Inventors: Thomas Lehnert, Martin Lenz, Bernd Holl, Günter Hähn
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Publication number: 20090289493Abstract: A chisel holder system including a base part and a chisel holder. The base part includes a socket wherein the chisel holder with a plug-in insert is introduced. The chisel holder has a bearing surface supported on a supporting surface of the base plate, and the base part has a shoulder connected to the supporting surface. A replacement chamber is formed between the shoulder and a facing end surface of the chisel holder. According to this invention, the supporting surface is placed in the transition region in relation to the shoulder by at least one recess of the shoulder so that the flat-shaped connection between the supporting surface and the shoulder, in the region of the recess, is interrupted in order to optimize the resistance to wear and tear of the base part.Type: ApplicationFiled: December 7, 2005Publication date: November 26, 2009Inventors: Bernd Holl, Dieter Simons
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Patent number: 7597402Abstract: A tool holder including a tool box with a tool seat in a holding projection for receiving a tool in such a manner that it can be replaced. The tool seat is configured as a bore and has a tool insertion opening. The tool holder has a fastening side with a fastening projection and, facing away from said fastening side, an exterior, and during use of the tool centrifugal forces are effective in the direction from the fastening side to the exterior. This invention ensures the free rotatability of a tool inserted in the tool holder even if overburden material enters the tool seat. For this purpose, the holding projection has an opening penetrating the inner wall of the tool seat and creating a spatial connection to the exterior, and the opening opens the tool seat towards the exterior.Type: GrantFiled: April 16, 2005Date of Patent: October 6, 2009Assignee: Wirtgen GmbHInventors: Günter Tewes, Jochen Blens, Bernd Holl
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Patent number: 7547075Abstract: A fixing device for a shank chisel including a base part to which a chisel holder is attached in a manner that enables it to be exchanged. The chisel holder has a chisel location for the shank chisel and has a supporting face on which the shank chisel can be supported. The chisel holder is coupled to the base part by a pivot bearing, and the chisel holder rests against a mating face of the base part. This invention provides a stress-optimized design for the above-mentioned arrangement. Thus, according to this invention, when the chisel holder is mounted, a contact area formed between the contact face and the mating face is located between a rotation axis or a rotation path of the pivot bearing and the supporting face.Type: GrantFiled: March 10, 2005Date of Patent: June 16, 2009Assignee: Wirtgen GmbHInventors: Günter Tewes, Jochen Blens, Bernd Holl
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Patent number: 7490912Abstract: A round shaft chisel with a clamping sleeve, wherein the round shaft chisel has a chisel head and a chisel shaft rotatably maintained in the clamping sleeve. A pivot bearing is between an inner contour of the clamping sleeve and a shaft contour of the chisel shaft so that a center longitudinal axis of the round shaft chisel is pivotably seated with respect to a center longitudinal axis of the clamping sleeve. As a result of the induced tumbling motion of the round shaft chisel within the clamping sleeve 30, improved dirt removal can be assured during operations. The improved rolling action results in reduced wear between the clamping sleeve and the chisel shaft, which has advantageous results regarding the service life.Type: GrantFiled: June 19, 2007Date of Patent: February 17, 2009Assignee: Betek Bergbau- und Hartmetalltechnik Karl-Heinz Simon GmbH & Co. KGInventor: Bernd Holl
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Publication number: 20090035064Abstract: A road milling machine having a milling roller with a plurality of chisels. A signal receiving unit is assigned to a machine component which is directly or indirectly involved in the milling process or to another machine component. The signal receiving unit detects an operating condition of the machine component and is connected to a signal emitting unit. An optical detecting device may be assigned to the road milling machine, whereby operations are made easier and the milling pattern is optimized.Type: ApplicationFiled: July 21, 2008Publication date: February 5, 2009Inventors: Bernd Holl, Kay Heemann, Gunter Hahn, Axel Mahlberg
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Patent number: 7461903Abstract: A cutting tool of a cutting machine having a base part and a bit holder. According to this invention, the bit holder has a plug-in attachment, retained in a socket of the base part that has a stop against which the bit holder rests. To prevent the penetration of water and stone dust and to allow the bit holder to be easily detached from the base part, a sealing element is located between the bit holder and the base part, surrounding at least sections of the socket.Type: GrantFiled: October 11, 2003Date of Patent: December 9, 2008Assignee: Wirtgen GmbHInventors: Günter Tewes, Bernd Holl
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Publication number: 20080223744Abstract: A tool holder including a tool box with a tool seat in a holding projection for receiving a tool in such a manner that it can be replaced. The tool seat is configured as a bore and has a tool insertion opening. The tool holder has a fastening side with a fastening projection and, facing away from said fastening side, an exterior, and during use of the tool centrifugal forces are effective in the direction from the fastening side to the exterior. This invention ensures the free rotability of a tool inserted in the tool holder even if overburden material enters the tool seat. For this purpose, the holding projection has an opening penetrating the inner wall of the tool seat and creating a spatial connection to the exterior, and the opening opens the tool seat towards the exterior.Type: ApplicationFiled: April 16, 2005Publication date: September 18, 2008Inventors: Gunter Tewes, Jochen Blens, Bernd Holl
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Patent number: D585259Type: GrantFiled: September 8, 2006Date of Patent: January 27, 2009Assignee: Wirtgen BmbHInventors: Bernd Holl, Thomas Lehnert, Günter Tewes, Günter Hähn
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Patent number: RE45540Abstract: A tool holder including a tool box with a tool seat in a holding projection for receiving a tool in such a manner that it can be replaced. The tool seat is configured as a bore and has a tool insertion opening. The tool holder has a fastening side with a fastening projection and, facing away from said fastening side, an exterior, and during use of the tool centrifugal forces are effective in the direction from the fastening side to the exterior. This invention ensures the free rotatability of a tool inserted in the tool holder even if overburden material enters the tool seat. For this purpose, the holding projection has an opening penetrating the inner wall of the tool seat and creating a spatial connection to the exterior, and the opening opens the tool seat towards the exterior.Type: GrantFiled: October 5, 2011Date of Patent: June 2, 2015Assignee: Wirtgen GmbHInventors: Jochen Blens, Bernd Holl, Silvia Tewes