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).

  • Patent number: 8522894
    Abstract: 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: Grant
    Filed: May 25, 2001
    Date of Patent: September 3, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Manfred Ruff, Harald Krondorfer, Ralph Dammertz, Joerg Goehner, Mario Frank, Franz Scheschark
  • Patent number: 7739932
    Abstract: 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: Grant
    Filed: September 24, 2004
    Date of Patent: June 22, 2010
    Assignee: Robert Bosch GmbH
    Inventors: 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
  • Patent number: 7722445
    Abstract: 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: Grant
    Filed: November 9, 2004
    Date of Patent: May 25, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch, Christof Hoelzl, Johann Huber
  • Patent number: 7497766
    Abstract: 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: Grant
    Filed: September 24, 2004
    Date of Patent: March 3, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch
  • Publication number: 20070272064
    Abstract: 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: Application
    Filed: September 24, 2004
    Publication date: November 29, 2007
    Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Harald Krondorfer, Joachim Schadow, Thomas Schomisch, Christof Hoelzl, Johann Huber
  • Publication number: 20070082590
    Abstract: 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: Application
    Filed: September 24, 2004
    Publication date: April 12, 2007
    Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Schadow, Sinisa Andrasic, Thomas Schomisch
  • Publication number: 20070060029
    Abstract: 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: Application
    Filed: November 9, 2004
    Publication date: March 15, 2007
    Inventors: Ernst Kraenzler, Peter Stierle, Albrecht Hofmann, Juergen Wiker, Harald Krondorfer, Joachim Shadow, Sinisa Andrasic, Thomas Schomisch, Christof Hoelzl, Johann Huber
  • Publication number: 20050224244
    Abstract: 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: Application
    Filed: May 25, 2001
    Publication date: October 13, 2005
    Inventors: Ernst Kraenzler, Manfred Ruff, Harald Krondorfer, Ralph Dammertz, Joerg Goehner, Mario Frank
  • Patent number: 6810970
    Abstract: 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: Grant
    Filed: August 16, 2000
    Date of Patent: November 2, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Gerd Berner, Monika Renner, Joachim Mueller
  • Patent number: 6794593
    Abstract: 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: Grant
    Filed: September 24, 2002
    Date of Patent: September 21, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Peter Stierle, Harald Krondorfer, Ralph Dammertz, Ralph Beetz, Mario Pauli
  • Publication number: 20040056540
    Abstract: 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: Application
    Filed: October 10, 2003
    Publication date: March 25, 2004
    Inventors: Ernst Kraenzler, Dietmar Saur, Hardy Schmid
  • Publication number: 20030062250
    Abstract: 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: Application
    Filed: September 24, 2002
    Publication date: April 3, 2003
    Inventors: Ernst Kraenzler, Peter Stierle, Harald Krondorfer, Ralph Dammertz, Ralph Beetz, Mario Pauli
  • Patent number: 6059493
    Abstract: 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: Grant
    Filed: June 17, 1998
    Date of Patent: May 9, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Kirn, Ernst Kraenzler, Klaus Klingenstein, Ernst Dreher, Gerd Hahn, David Matzo, Joerg Ullrich, Joerg Dehde, Karl Garatwa, Joachim Schadow, Christian Hermes, Joerg Moessner
  • Patent number: 5606234
    Abstract: 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: Grant
    Filed: November 3, 1995
    Date of Patent: February 25, 1997
    Assignee: Robert Bosch GmbH
    Inventors: Ernst Kraenzler, Guillermo Havenstein, Angelo Fernandes, Ottmar Seel