Patents by Inventor Christof Hoelzl
Christof Hoelzl 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: 8608530Abstract: The present invention is directed to an insertion tool (12) for a machine tool that has a hub (16) with at least one opening (42, 80) for insertion of a fastening means (40, 84), via which the hub (16) is clampable on a driving flange (22) of the machine tool connected to a drive shaft, the opening (42, 80) including a retaining region (54) and a releasing region (56), the releasing region (56) including a stop (66, 88) for limiting a release motion of the fastening means (40, 84). It is provided that the opening (42, 80) adjacent to the stop (66, 88) has a convex section (76, 90).Type: GrantFiled: November 8, 2004Date of Patent: December 17, 2013Assignee: Robert Bosch GmbHInventors: Albrecht Hofmann, Harald Krondorfer, Thomas Schomisch, Christof Hoelzl, Johann Huber, Kersten Heckmann
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Patent number: 7739932Abstract: A tool-holding device for an insert tool (14) equipped with an at least essentially disk-shaped hub (42), in particular for a hand-guided angle grinder (32) or a hand-guided circular saw, having a drive device (12) that includes a leaf spring unit (58) and is able to clamp the insert tool (14) in the axial direction (64). The leaf spring unit (58) has at least one freely extending spring piece (110) that extends at least partially in the circumference direction (50, 52).Type: GrantFiled: September 24, 2004Date of Patent: June 22, 2010Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch, Christof Hoelzl, Johann Huber, Marcus Heckmann, Kirsten Heckmann, legal representative
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Patent number: 7722445Abstract: An insertion tool (12) for an angle grinder (2) that has a hub (16) with at least a first fastening means for fastening the hub (16) to a driving device (22) of the angle grinder (2). The first fastening means if located on a partial circle (54) with a radius (56) of between 12 mm and 25 mm.Type: GrantFiled: November 9, 2004Date of Patent: May 25, 2010Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch, Christof Hoelzl, Johann Huber
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Publication number: 20070272064Abstract: A tool-holding device for an insert tool (14) equipped with an at least essentially disk-shaped hub (42), in particular for a hand-guided angle grinder (32) or a hand-guided circular saw, having a drive device (12) that includes a leaf spring unit (58) and is able to clamp the insert tool (14) in the axial direction (64). The leaf spring unit (58) has at least one freely extending spring piece (110) that extends at least partially in the circumference direction (50, 52).Type: ApplicationFiled: September 24, 2004Publication date: November 29, 2007Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Harald Krondorfer, Joachim Schadow, Thomas Schomisch, Christof Hoelzl, Johann Huber
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Publication number: 20070060029Abstract: The present invention is directed to an insertion tool (12) for an angle grinder (2) that has a hub (16) with at least a first fastening means for fastening the hub (16) to a driving device (22) of the angle grinder (2). It is provided that the first fastening means is located on a partial circle (54) with a radius (56) between 12 mm and 25 mm.Type: ApplicationFiled: November 9, 2004Publication date: March 15, 2007Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Shadow, Sinisa Andrasic, Thomas Schomisch, Christof Hoelzl, Johann Huber
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Patent number: 7097548Abstract: The invention is based on an insertable tool with a rotationally driven disk-shaped hub (10, 12), to which a grinding means (14) is secured in the radially outer region. It is proposed that the hub (10, 12) is embodied with a flexural strength that varies in the radial direction.Type: GrantFiled: December 14, 2001Date of Patent: August 29, 2006Assignees: Robert Bosch GmbH, Tyrolit Schleifmittel Swarovski K.G.Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Publication number: 20060172668Abstract: The present invention is directed to an insertion tool (12) for a machine tool that has a hub (16) with at least one opening (42, 80) for insertion of a fastening means (40, 84), via which the hub (16) is clampable on a driving flange (22) of the machine tool connected to a drive shaft, the opening (42, 80) including a retaining region (54) and a releasing region (56), the releasing region (56) including a stop (66, 88) for limiting a release motion of the fastening means (40, 84). It is provided that the opening (42, 80) adjacent to the stop (66, 88) has a convex section (76, 90).Type: ApplicationFiled: November 8, 2004Publication date: August 3, 2006Inventors: Albercht Hofmann, Harald Krondorfer, Thomas Schomisch, Christof Hoelzl, Johann Huber, Marcus Heckmann
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Patent number: 6902471Abstract: The invention is based on an insertable tool having a rotationally drivable, disk-shaped hub (10, 12), on which a grinding means (14) forming a cutoff disk, grinding disk, roughing disk, or abrasive disk is secured in the radially outer region. It is proposed that the grinding means (14) and the hub (10, 12) are joined via joining means (26) in the manner of a positive connection at least in the direction of rotation.Type: GrantFiled: January 23, 2002Date of Patent: June 7, 2005Assignees: Robert Bosch GmbH, Tyrolit Schleifmittelwerke Swarovski K.G.Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Patent number: 6869346Abstract: The invention is based on a tool receiver for a grinder, in particular for a handheld angle grinder (10), having a carrier device (12, 14, 16, 182, 184, 300), via which an application tool (18, 32, 186, 188) can be actively connected to a drive shaft (54). It is proposed that the application tool (18, 32, 186, 188) be actively connectable to the carrier device (14, 16, 182, 184) via at least one detent element (24, 26, 190, 192, 194, 196, 198, 200, 302) movable against a spring force that snaps into place in an operating position of the application tool (18, 32, 186, 188) and immobilizes the application tool (18, 32, 186, 188) with positive engagement.Type: GrantFiled: March 31, 2001Date of Patent: March 22, 2005Assignees: Robert Bosch GmbH, Tyrolit Schleifmittel Swarovski K.G.Inventors: Dieter Wendt, Harald Krondorfer, Ralph Dammertz, Markus Heckmann, Joachim Schadow, Thomas Schomisch, Marco Brancato, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Patent number: 6786811Abstract: A grinding machine tool receptacle for a hand-guided angle grinding machine has a slaving device by which an insert tool is operatively connectable to a drive shaft, the insert tool is operatively connectable to the slaving device via at least one detent element supported movably counter to a spring element, which detent element snaps into place in an operating position of the insert tool driven by the spring element and fixes the insert tool by positive engagement, the detent element is displaceable in the axial direction counter to the spring element, and the insert tool is connected to the slaving device in the circumferential direction via at least a first element and in the axial direction via at least a second element, with the second element arranged for fixing of the insert tool with a spring force.Type: GrantFiled: February 20, 2002Date of Patent: September 7, 2004Assignees: Robert Bosch GmbH, Tyrolit Schleifmittel Swarovski K.G.Inventors: Harald Krondorfer, Ralph Dammertz, Zaal-Azhar Alias, Markus Heckmann, Joachim Schadow, Thomas Schomisch, Marco Brancato, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Publication number: 20030176153Abstract: The invention is based on an insertable tool having a rotationally drivable, disk-shaped hub (10, 12), on which a grinding means (14) forming a cutoff disk, grinding disk, roughing disk, or abrasive disk is secured in the radially outer region.Type: ApplicationFiled: April 21, 2003Publication date: September 18, 2003Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johan Huber, Wilhelm Schulze
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Publication number: 20030162487Abstract: The invention is based on an insertable tool with a rotationally driven disk-shaped hub (10, 12), to which a grinding means (14) is secured in the radially outer region.Type: ApplicationFiled: March 19, 2003Publication date: August 28, 2003Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Publication number: 20030129933Abstract: The invention is based on a tool receiver for a grinder, in particular for a handheld angle grinder (10), having a carrier device (12, 14, 16, 182, 184, 300), via which an application tool (18, 32, 186, 188) can be actively connected to a drive shaft (54).Type: ApplicationFiled: March 1, 2002Publication date: July 10, 2003Inventors: Dieter Wendt, Harald Krondorfer, Ralph Dammertz, Markus Heckmann, Joachim Schadow, Thomas Schomisch, Marco Brancato, Christof Hoelzl, Johann Huber, Wilhelm Schulze
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Publication number: 20030104773Abstract: The invention is based on a grinding machine tool receptacle, in particular for a hand-guided angle grinding machine (10), having a slaving device (12, 14, 16, 300), by way of which an insert tool (18, 32) can be operatively connected to a drive shaft (54).Type: ApplicationFiled: February 20, 2002Publication date: June 5, 2003Inventors: Harald Krondorfer, Ralph Dammertz, Zaal-Azhar Alias, Markus Heckmann, Joachim Schadow, Thomas Schomisch, Marco Brancato, Christof Hoelzl, Johann Huber, Wilhelm Schulze