Patents by Inventor Ernst Kraenzler
Ernst Kraenzler 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: 8522894Abstract: The invention is based on a power tool with at least one handle (10, 26, 50, 62, 104) that comprises at least one grip part (12, 72, 106) that is firmly connected to a mounting part (16, 70, 110) via at least one elastic, vibration-damping element (14, 24, 52, 108), via which the grip part (12, 72, 106) is affixable to a housing (60). It is proposed that the connection between the grip part (12, 72, 106) and the mounting part (16, 70, 110) is secured by means of the elastic element (14, 24, 52, 108) via at least one movable retaining element (20, 22, 28, 64, 112).Type: GrantFiled: May 25, 2001Date of Patent: September 3, 2013Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Manfred Ruff, Harald Krondorfer, Ralph Dammertz, Joerg Goehner, Mario Frank, Franz Scheschark
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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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Patent number: 7497766Abstract: A tool-handling 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 shaft (16) and a drive device (12) equipped with at least one locking element(20) that is supported so that it is able to move in relation to a spring element (18) in order to fix the insert tool (14) in a form-locked manner in the circumference direction (50, 52). The drive shaft (16) has at least one form-locking element (100) formed onto it in a non-cutting manner in order to connect it in a form-locked manner in the circumference direction (50, 52) to a drive torque-transmitting mechanism of the drive device (12).Type: GrantFiled: September 24, 2004Date of Patent: March 3, 2009Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch
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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: 20070082590Abstract: The invention relates to a tool receiving device for a machine tool (14), comprising an at least essentially disk-shaped hub (42), particularly for a hand-guided angle grinder (32) or a hand-held circular saw. Said tool receiving device also comprises a drive shaft (16) and a receiving device (12) comprising at least one catching element (20) which can be displaceably mounted against a spring element (18) in order to fix the machine tool in a positive fit in the direction of the periphery (50, 52). According to the invention, the drive shaft (16) comprises at least one shaped positive fit non chip-removing element (100) which is connected in a positive fit in the direction of the periphery (50, 52) to means for the transmission of drive torque in the receiving device (12).Type: ApplicationFiled: September 24, 2004Publication date: April 12, 2007Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch
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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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Publication number: 20050224244Abstract: The invention is based on a power tool with at least one handle (10, 26, 50, 62, 104) that comprises at least one grip part (12, 72, 106) that is firmly connected to a mounting part (16, 70, 110) via at least one elastic, vibration-damping element (14, 24, 52, 108), via which the grip part (12, 72, 106) is affixable to a housing (60). It is proposed that the connection between the grip part (12, 72, 106) and the mounting part (16, 70, 110) is secured by means of the elastic element (14, 24, 52, 108) via at least one movable retaining element (20, 22, 28, 64, 112).Type: ApplicationFiled: May 25, 2001Publication date: October 13, 2005Inventors: Ernst Kraenzler, Manfred Ruff, Harald Krondorfer, Ralph Dammertz, Joerg Goehner, Mario Frank
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Patent number: 6810970Abstract: A hand power tool has housing, a motor arranged in the housing and having a drive shaft with two opposite ends, bearings each supporting one of the ends of the drive shaft in at least one component, an insert tool, a drive element through which the drive shaft is operatively connected with the insert tool, at least one of the bearings of the drive shaft being supported on the component over one part of its length in a radial direction through a sliding seat, and also being supported on the component over another part of its length in the radial direction through a synthetic plastic ring.Type: GrantFiled: August 16, 2000Date of Patent: November 2, 2004Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Gerd Berner, Monika Renner, Joachim Mueller
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Patent number: 6794593Abstract: An electric hand power tool has an on/off switch, an elongated switching key having a front end and a rear end and actuating the switch, a blocking lever carried by and projecting from the switching key to prevent or to allow turning on of the latter, the switching key being supported turnably, the switching key having a convex curvature starting substantially centrally and extending toward the rear end, the switching key carrying the blocking lever near the rear end, the blocking lever having an upper edge located under a tangent between the convex curvature and the rear end of the switching key.Type: GrantFiled: September 24, 2002Date of Patent: September 21, 2004Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Peter Stierle, Harald Krondorfer, Ralph Dammertz, Ralph Beetz, Mario Pauli
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Publication number: 20040056540Abstract: The invention relates to a device comprising at least one suppressor (10, 12) for reducing interference, especially in the high-frequency range of an electric machine (18), and also comprising at least one connection element (14, 16) for connection to a pole shoe of the electric machine (18).Type: ApplicationFiled: October 10, 2003Publication date: March 25, 2004Inventors: Ernst Kraenzler, Dietmar Saur, Hardy Schmid
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Publication number: 20030062250Abstract: An electric hand power tool has an on/off switch, an elongated switching key having a front end and a rear end and actuating the switch, a projecting blocking lever which manually sets a turning on lock out of operation, the switching key being supported turnably, the switching key having a concave curvature starting substantially centrally and extending toward the rear end, the switching key carrying the blocking lever near the rear end.Type: ApplicationFiled: September 24, 2002Publication date: April 3, 2003Inventors: Ernst Kraenzler, Peter Stierle, Harald Krondorfer, Ralph Dammertz, Ralph Beetz, Mario Pauli
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Patent number: 6059493Abstract: The hand-held machine tool has a tool holder (20) provided with a receptacle (19) into which a shaft portion (15) of a tool (16) is axially insertable. The tool holder (20) has a longitudinal axis (11) and includes a guide device (18) for axially guiding the tool (16); a device (23) for rotary slaving of the tool (16); a retaining device (28) for axially securing the tool (16) and a locking member (34) for locking the retaining device (28) in an open configuration for insertion or removal of the tool (16). The retaining device (28) is located in front of the guide device in an insertion direction of the tool (16) in the tool holder (16). The retaining device (28) is provided with an opening (31) for passage of the tool (16) through it.Type: GrantFiled: June 17, 1998Date of Patent: May 9, 2000Assignee: Robert Bosch GmbHInventors: Manfred Kirn, Ernst Kraenzler, Klaus Klingenstein, Ernst Dreher, Gerd Hahn, David Matzo, Joerg Ullrich, Joerg Dehde, Karl Garatwa, Joachim Schadow, Christian Hermes, Joerg Moessner
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Patent number: 5606234Abstract: In known electrically operated handheld machine tools, a potentiometer serving to control output must be balanced so that a desired tap resistance can be tapped at the potentiometer in a determined adjustment position of the potentiometer. To reduce manufacturing expenses, this balancing is effected without required additional structural component parts or costly additional devices.The potentiometer (20) has a resistance path (21) with which a slider (22) is in electrically conducting contact by pressing. The slider (22) can be actuated manually by an actuating member (15). The slider (22) and actuating member (15) have means (26) for adjusting their relative position with respect to one another after their insertion into a housing (11) of the handheld machine tool.Type: GrantFiled: November 3, 1995Date of Patent: February 25, 1997Assignee: Robert Bosch GmbHInventors: Ernst Kraenzler, Guillermo Havenstein, Angelo Fernandes, Ottmar Seel