Patents by Inventor Norbert Stehr
Norbert Stehr 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: 10792665Abstract: An agitator ball mill comprises agitating discs (18) on an agitating shaft, wherein two adjacent agitating discs (18) are bounding a grinding cell, respectively. The agitating discs (18) comprise grinding material passage openings (28) which are only arranged in the immediate proximity of a grinding chamber inner boundary (19), which connect adjacent grinding cells, and which have a radially outer boundary that has a distance R28 starting from the grinding chamber inner boundary (19) in the radial direction of the agitating disc (18). For the ratio of the distance R28 of the radially outer boundaries of the grinding material passage openings (28) to a radial extension R18 of the agitating discs (18), the following condition applies: 0.05·R18?R28?0.25·R18. Otherwise the agitating discs (18) are closed.Type: GrantFiled: October 13, 2017Date of Patent: October 6, 2020Assignee: Willy A. Bachofen AGInventors: Benedikt Simons, Lionel Gross, Norbert Stehr
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Patent number: 10173222Abstract: An agitator ball mill that includes agitating discs (18) on an agitating shaft drivable in a spinning direction (38), which are provided with entraining profiles (35). These entraining profiles (35) are formed by a trailing wall of a respective channel of a plurality of channels (36). In relation to the spinning direction (38) the trailing wall (39) of an inner channel section (49) runs radially straight relative to the central longitudinal axis (15) and has a length f, and has an outer bent-off channel section (41), which is bent off counter to the spinning direction (38). The outer channel sections (41) are closed radially to the outside by a peripheral portion (42) of the agitating disc (18) having a radial width e.Type: GrantFiled: October 13, 2017Date of Patent: January 8, 2019Assignee: Willy A. Bachofen AGInventors: Benedikt Simons, Lionel Gross, Norbert Stehr
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Publication number: 20180104698Abstract: An agitator ball mill comprises agitating discs (18) on an agitating shaft drivable in a spinning direction (38), which are provided with entraining profiles (35). These entraining profiles (35) are formed by channels (36) each comprising with its—in relation to the spinning direction (38)—trailing wall (39) an inner channel section (49) running radially straight relative to the central longitudinal axis (15) and having a length f, and in the further course an outer bent-off channel section (41), which is bent off counter to the spinning direction (38). The outer channel sections (41) are closed radially to the outside by a peripheral portion (42) of the agitating disc (18) having a radial width e.Type: ApplicationFiled: October 13, 2017Publication date: April 19, 2018Inventors: Benedikt SIMONS, Lionel GROSS, Norbert STEHR
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Publication number: 20180104699Abstract: An agitator ball mill comprises agitating discs (18) on an agitating shaft, wherein two adjacent agitating discs (18) are bounding a grinding cell, respectively. The agitating discs (18) comprise grinding material passage openings (28) which are only arranged in the immediate proximity of a grinding chamber inner boundary (19), which connect adjacent grinding cells, and which have a radially outer boundary that has a distance R28 starting from the grinding chamber inner boundary (19) in the radial direction of the agitating disc (18). For the ratio of the distance R28 of the radially outer boundaries of the grinding material passage openings (28) to a radial extension R18 of the agitating discs (18), the following condition applies: 0.05·R18?R28?0.25·R18. Otherwise the agitating discs (18) are closed.Type: ApplicationFiled: October 13, 2017Publication date: April 19, 2018Inventors: Benedikt SIMONS, Lionel GROSS, Norbert STEHR
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Patent number: 8002213Abstract: An agitator mill has a grinding vessel and an agitator shaft arranged such that it can be driven to rotate therein. Fixed at the end of the agitator shaft is a last agitator disc, on which is fixed a substantially cylindrical cage having apertures. Arranged inside the cage is a screening device. The distance between a second to last agitator disc and the last agitator disc is such that a braided flow forms, while avoiding a preliminary screening of grinding stock on one hand and auxiliary grinding bodies and coarse grinding stock particles on the other hand. Formed in the last agitator disc are passages through which the grinding stock passes together with the auxiliary grinding bodies, at which time a separation of the auxiliary grinding bodies and the coarse grinding stock particles takes place within the separating chamber formed by the last agitator disc and the cage.Type: GrantFiled: August 17, 2007Date of Patent: August 23, 2011Assignee: Büler AGInventor: Norbert Stehr
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Patent number: 7931222Abstract: An agitator mill for treating free-flowing grinding stock has a grinding receptacle and an interior stator disposed therein. A rotatably drivable annular cylindrical rotor is disposed between the interior stator and the receptacle wall, with a grinding chamber being defined between said rotor and the receptacle wall. A grinding-stock discharge conduit is formed between the rotor and the interior stator (22) which is connected to the grinding chamber by means of a deflection conduit. Devices are provided for preventing the carry-over of auxiliary grinding bodies from the grinding chamber into the grinding-stock discharge conduit.Type: GrantFiled: July 20, 2010Date of Patent: April 26, 2011Assignee: Bühler AGInventors: Norbert Stehr, Philipp Schmitt
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Publication number: 20110036935Abstract: An agitator mill has a grinding vessel and an agitator shaft arranged such that it can be driven to rotate therein. Fixed at the end of the agitator shaft is a last agitator disc, on which is fixed a substantially cylindrical cage having apertures. Arranged inside the cage is a screening device. The distance between a second to last agitator disc and the last agitator disc is such that a braided flow forms, while avoiding a preliminary screening of grinding stock on one hand and auxiliary grinding bodies and coarse grinding stock particles on the other hand. Formed in the last agitator disc are passages through which the grinding stock passes together with the auxiliary grinding bodies, at which time a separation of the auxiliary grinding bodies and the coarse grinding stock particles takes place within the separating chamber formed by the last agitator disc and the cage.Type: ApplicationFiled: August 17, 2007Publication date: February 17, 2011Inventor: Norbert Stehr
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Publication number: 20100282884Abstract: An agitator mill for treating free-flowing grinding stock has a grinding receptacle and an interior stator disposed therein. A rotatably drivable annular cylindrical rotor is disposed between the interior stator and the receptacle wall, with a grinding chamber being defined between said rotor and the receptacle wall. A grinding-stock discharge conduit is formed between the rotor and the interior stator (22) which is connected to the grinding chamber by means of a deflection conduit. Devices are provided for preventing the carry-over of auxiliary grinding bodies from the grinding chamber into the grinding-stock discharge conduit.Type: ApplicationFiled: July 20, 2010Publication date: November 11, 2010Applicant: Buhler AGInventors: Norbert Stehr, Philipp Schmitt
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Publication number: 20090179099Abstract: An agitator mill for treating free-flowing grinding stock has a grinding receptacle and an interior stator disposed therein. A rotatably drivable annular cylindrical rotor is disposed between the interior stator and the receptacle wall, with a grinding chamber being defined between said rotor and the receptacle wall. A grinding-stock discharge conduit is formed between the rotor and the interior stator (22) which is connected to the grinding chamber by means of a deflection conduit. Devices are provided for preventing the carry-over of auxiliary grinding bodies from the grinding chamber into the grinding-stock discharge conduit.Type: ApplicationFiled: October 11, 2005Publication date: July 16, 2009Applicant: Bühler AGInventors: Norbert Stehr, Philipp Schmitt
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Patent number: 7243866Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber which is defined by an inner wall of a grinding receptacle and an outer wall of a rotor; and an interior grinding chamber which is defined by an inner wall of the rotor and an outer casing of an interior stator. The grinding chambers are interconnected by a deflection chamber. A grinding-stock supply area, which is upstream of the exterior grinding chamber, and a separator device, which is disposed approximately on the same side of the grinding receptacle, serving for grinding-stock discharge, are interconnected by auxiliary-grinding-body return conduits. These conduits are arranged in an independent auxiliary-grinding-body return module and are open towards a front of the module.Type: GrantFiled: June 30, 2005Date of Patent: July 17, 2007Assignee: Bühler AGInventors: Norbert Stehr, Philipp Schmitt
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Patent number: 7216822Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber which is defined by an inner wall of a grinding receptacle and an outer wall of a rotor; and an interior grinding chamber which is defined by an inner wall of the rotor and an outer casing of an interior stator. The grinding chambers are interconnected by a deflection chamber. g<h applies to the radial gap width g of the exterior grinding chamber in relation to the radial gap width h of the interior grinding chamber.Type: GrantFiled: July 1, 2005Date of Patent: May 15, 2007Assignee: Bühler AGInventors: Norbert Stehr, Philipp Schmitt
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Publication number: 20060261200Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber which is defined by an inner wall of a grinding receptacle and an outer wall of a rotor; and an interior grinding chamber which is defined by an inner wall of the rotor and an outer casing of an interior stator. The grinding chambers are interconnected by a deflection chamber. g<h applies to the radial gap width g of the exterior grinding chamber in relation to the radial gap width h of the interior grinding chamber.Type: ApplicationFiled: July 1, 2005Publication date: November 23, 2006Applicant: Buhler AGInventors: Norbert Stehr, Philipp Schmitt
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Publication number: 20060261199Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber which is defined by an inner wall of a grinding receptacle and an outer wall of a rotor; and an interior grinding chamber which is defined by an inner wall of the rotor and an outer casing of an interior stator. The grinding chambers are interconnected by a deflection chamber. A grinding-stock supply area, which is upstream of the exterior grinding chamber, and a separator device, which is disposed approximately on the same side of the grinding receptacle, serving for grinding-stock discharge, are interconnected by auxiliary-grinding-body return conduits. These conduits are arranged in an independent auxiliary-grinding-body return module and are open towards a front of the module.Type: ApplicationFiled: June 30, 2005Publication date: November 23, 2006Applicant: Buhler AgInventors: Norbert Stehr, Philipp Schmitt
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Patent number: 6460791Abstract: An agitator mill with a grinding receptacle comprises a grinding chamber defined by an inner wall thereof and a rotor which is located therein and driven in high-speed actuation. Mounted on the rotor are agitator elements which stand out radially and to which are allocated counterpart elements mounted on the inner wall. A grinding-stock inlet is provided on an end of the grinding chamber and a grinding-stock outlet is provided on the other end of the grinding chamber, comprising an auxiliary-grinding-body separating device for the auxiliary grinding bodies in the grinding chamber to be held back. The distance of agitator elements and counterpart elements which adjoin each other decreases from the grinding-stock inlet towards the auxiliary-grinding-body separating device.Type: GrantFiled: March 9, 2001Date of Patent: October 8, 2002Assignee: Draiswerke GmbHInventor: Norbert Stehr
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Patent number: 6021969Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber, which is defmed by an inner wall of a grinding receptacle and an outer wall of a rotor and an interior grinding chamber, which is defined by an inner wall of the rotor and an outer jacket of an interior stator. The grinding chambers are interconnected by a deflection chamber. Allocated to the interior stator is a separating device which comprises inner annular disks rotatingly drivably coupled with the rotor and outer annular disks non-rotarily connected to the interior stator.Type: GrantFiled: April 27, 1999Date of Patent: February 8, 2000Assignee: Draiswerke GmbHInventors: Philipp Schmitt, Norbert Stehr
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Patent number: 5996914Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber, which is defined by an interior wall of a grinding receptacle and an outer wall of a rotor, and an interior grinding chamber, which is defined by an inner wall of the rotor and an outer jacket of an interior stator. The grinding chambers are connected with each other by a deflection chamber. An annular cylindrical eddy gap, which is defined by the rotor and the interior wall of the grinding receptacle and into which open the bypasses, is formed between a grinding stock supply chamber, which is disposed up-stream of the exterior grinding chamber, and the exterior grinding chamber.Type: GrantFiled: November 3, 1998Date of Patent: December 7, 1999Assignee: Draiswerke GmbHInventor: Norbert Stehr
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Patent number: 5950943Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber, which is defined by an interior wall of a grinding receptacle and an outer wall of a rotor, and an interior grinding chamber, which is defined by an inner wall of the rotor and an outer jacket of an interior stator. The grinding chambers are connected with each other by a deflection chamber. The walls defining the grinding chambers are smooth, free from agitator elements.Type: GrantFiled: August 5, 1997Date of Patent: September 14, 1999Assignee: Draiswerke GmbHInventor: Norbert Stehr
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Patent number: 5897068Abstract: An agitator mill comprises an annular cylindrical exterior grinding chamber, which is defined by an interior wall of a grinding receptacle and an outer wall of a rotor, and an interior grinding chamber, which is defined by an inner wall of the rotor and an outer jacket of an interior stator. The grinding chambers are connected with each other by a deflection chamber. The exterior grinding chamber is equipped with agitator elements, whereas the interior grinding chamber is smooth-walled, free from agitator elements. The cross-sectional surface of the exterior grinding chamber considerably exceeds the cross-sectional surface of the interior grinding chamber.Type: GrantFiled: October 15, 1998Date of Patent: April 27, 1999Assignee: Draiswerke GmbHInventor: Norbert Stehr
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Patent number: 5634715Abstract: An installation for the mixing of a given quantity of liquid with a given quantity of powdery solid matter comprises a storage tank for the liquid and a mixing device having an inlet hopper. A liquid supply conduit, coming from the storage tank, and a solid matter proportioning device open into the inlet hopper. The supply capacity of the proportioning device and the throughput of the mixer are adjustable in such a way that the given quantity of solid matter is added to the liquid by several circulations of the liquid through the mixer.Type: GrantFiled: March 4, 1996Date of Patent: June 3, 1997Assignee: Draiswerke GmbHInventors: Norbert Stehr, Dieter Marz
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Patent number: 5624080Abstract: An agitator mill is provided with a separate grinding-stock/auxiliary-grinding-body separator device, which comprises a rotor, drivable to rotate, for the separation of the auxiliary grinding bodies from the treated grinding stock. The auxiliary grinding bodies and untreated grinding stock are returned to the agitator mill. The separator device and the agitor mill and the lines connecting these two form a closed system.Type: GrantFiled: September 8, 1995Date of Patent: April 29, 1997Assignee: EVV-Vermogensverwaltungs-GmbHInventors: Norbert Stehr, Philipp Schmitt