Patents by Inventor Harald Krondorfer

Harald Krondorfer 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).

  • Publication number: 20070144752
    Abstract: The present invention is an articulating hand power tool with a head portion including a head housing, a bit holder rotatably positioned within the head housing, and a bearing member operable to transfer a first axial force from the bit holder to the head housing. A frame is rotatably connected to the head portion for placement in a plurality of positions with respect to the head portion and operably connected to the head housing for receiving the first axial force transferred to the head housing. The tool further includes an articulating gear system for transferring rotational force generated by a motor to the bit holder at each of the plurality of positions.
    Type: Application
    Filed: November 3, 2006
    Publication date: June 28, 2007
    Applicants: Credo Technology Corporation, Robert Bosch GmbH
    Inventors: David Pozgay, Harald Krondorfer, John Freese
  • Publication number: 20070144310
    Abstract: The present invention is an articulating hand power tool with a main housing having a longitudinal axis, a head portion rotatably engaged with the main housing for placement at a plurality of angles with respect to the longitudinal axis of the main housing, an integrated circuit board located within the main housing and at least one controller accessible from outside of the main housing for controlling the integrated circuit board.
    Type: Application
    Filed: November 3, 2006
    Publication date: June 28, 2007
    Applicants: Credo Technology Corporation, Robert Bosch GmbH
    Inventors: David Pozgay, Harald Krondorfer, John Freese, John DeCicco, Stephen Oberheim
  • Publication number: 20070102268
    Abstract: The present invention is directed to a power tool with a removable power supply unit (32, 132, 232) on the device side for supplying electrical power, with at least one indirectly actuatable switch (14, 114, 214) for switching a drive machine on and off. It is provided that a decoupling device (58, 158, 258) for decoupling the switch (14, 114, 214) and a switching element (26, 126, 226) that at least indirectly actuates the switch (14, 114, 214) are provided.
    Type: Application
    Filed: November 8, 2004
    Publication date: May 10, 2007
    Inventors: Albrecht Hofmann, Harald Krondorfer, Thomas Schomisch
  • 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: 20070065246
    Abstract: The present invention relates to a hand-held power tool. The hand-held power tool includes a housing with cavity. A drawer is provided within the cavity. A flexible member is coupled to the drawer. Furthermore, a latching mechanism with first and second members are included. The first member of the latching mechanism is coupled to the housing and the second potion of the latching mechanism is incorporated into the flexible member.
    Type: Application
    Filed: September 16, 2005
    Publication date: March 22, 2007
    Inventors: Brad Baber, Dean Peterson, Harald Krondorfer
  • 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
  • Patent number: 7097548
    Abstract: 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: Grant
    Filed: December 14, 2001
    Date of Patent: August 29, 2006
    Assignees: Robert Bosch GmbH, Tyrolit Schleifmittel Swarovski K.G.
    Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johann Huber, Wilhelm Schulze
  • Publication number: 20060172668
    Abstract: 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: Application
    Filed: November 8, 2004
    Publication date: August 3, 2006
    Inventors: Albercht Hofmann, Harald Krondorfer, Thomas Schomisch, Christof Hoelzl, Johann Huber, Marcus Heckmann
  • Patent number: 7077735
    Abstract: A system with a tool-holding socket, which has a driver device that can be used to operationally connect an insert tool to a drive shaft, and has an insert tool, wherein the insert tool can be operationally connected to the driver device by at least one detent element which is supported so that can move in opposition to a spring element, engages in detent fashion in an operating position of the insert tool, and fixes the insert tool in a positively engaging fashion, wherein at least part of a mechanism for preventing a laterally inverted installation of the insert tool is formed at least onto the tool-holding socket.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: July 18, 2006
    Assignees: Robert Bosch GmbH, Tyrolit Schleifmittel Swarovski K.G.
    Inventors: Harald Krondorfer, Markus Heckmann, Thomas Schomisch, Johann Huber
  • Patent number: 6988939
    Abstract: In a hand-guided electrical tool 3 with a housing 2 that has a receiving collar 20 embodied on it and with a guard hood 1 that can be attached to the receiving collar 20 and has a clamping strap 16, which can move freely around the receiving collar 20 in a first position and rests snugly against the receiving collar 20 in a second position, a secure connection between the guard hood 1 and the housing 2 is achieved by virtue of the fact that the receiving collar 20 has at least one protrusion 21, which protrudes beyond the second area in the radial direction away from the spindle axle 5, and between the protrusion 21 and the housing 2, there is a distance h, which approximately corresponds to the width b of the clamping strap 16, and by virtue of the fact that that the clamping strap 16 has at least one indentation 12 so that the first diameter d1 of the opening 10 of the clamping strap 16 in the vicinity of the indentation 12 is greater than the second diameter d2 in the remaining region, wherein the first di
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: January 24, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Thomas Schomisch
  • Publication number: 20050230135
    Abstract: The invention is based on a rechargeable battery-operated hand machine tool (10) having an electric drive motor (18) accommodated in a housing (12) and powered by a rechargeable battery (20), which motor is used to drive a tool (16), and having an actuating means (14) for switching the drive motor (18) on and off. A mechanism (22) is provided, which is capable of reducing the discharging of the battery (20) during operation.
    Type: Application
    Filed: April 11, 2005
    Publication date: October 20, 2005
    Inventors: Harald Krondorfer, Volker Bosch
  • 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: 6942560
    Abstract: The invention is based on an insert tool with a rotationally driveable disk-shaped hub and an abrasive disposed in particular in a radially outer region, in particular of the kind used for a cut-off wheel, a grinding disk, a rough grinding disk, a cutting disk, or an abrasive paper. The invention proposes that the hub (10) have at least one mount (16, 18, 20), which is disposed off-center, extends in the axial direction (14), and is intended for a bolt that constitutes a functional element of a quick-action clamping system.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: September 13, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Thomas Schomisch
  • Patent number: 6938532
    Abstract: In a power tool with two cutting wheels (11, 12), which rotate past each other in opposite directions, rest directly against each other, and can be driven by two drive spindles (14, 15) disposed concentrically to each other, and with a tool fitting (13) for the cutting wheels (11, 12) that has a support flange (18, 24), which is non-rotatably connected to the respective inner or outer drive spindle and provides a centered support and form-fitting rotary slaving for the cutting wheels (11, 12), and has clamping means for securing the form-fitting engagement between the cutting wheels (11, 12) and the support flanges (18, 24), in order to produce a simple design of the tool fitting (13), with a high operational reliability and a low space requirement, as well as tool-free changing of the cutting wheels, the clamping means have a screw part (27), which supports the second support flange (24) and whose end can be screwed without tools into the inner drive spindle (15), and have a clamping part, which can be actua
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: September 6, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Thomas Schomisch
  • Patent number: 6935438
    Abstract: A battery-operated electrical tool (10) is provided with a machine housing (11) that has a longish, substantially rod-shaped housing portion (12) containing an electric drive motor (13) and an end portion (15) on which a terminal connection surface (16) with push-in receptacle (17) for the detachable attachment of a battery packet (14) is provided, which said battery packet is provided with a connection part (18) that comprises a seating surface (19) matched to the connection surface (16) for seating on said connection surface, and comprising a push-in part (20) engaging in the push-in receptacle (17). The end portion (15) is inflected toward one side in relation to the housing portion (12) out of the direction of longitudinal extension. The terminal connection surface (16) of the end portion (15) extends within a plane (21) that is oriented skew in relation to a plane (22) extending substantially perpendicularly to the longitudinal axis (23) of the housing portion (12).
    Type: Grant
    Filed: June 16, 2001
    Date of Patent: August 30, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Thomas Schomisch
  • Patent number: 6902471
    Abstract: 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: Grant
    Filed: January 23, 2002
    Date of Patent: June 7, 2005
    Assignees: Robert Bosch GmbH, Tyrolit Schleifmittelwerke Swarovski K.G.
    Inventors: Harald Krondorfer, Markus Heckmann, Joachim Schadow, Christof Hoelzl, Johann Huber, Wilhelm Schulze
  • Patent number: 6869346
    Abstract: 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: Grant
    Filed: March 31, 2001
    Date of Patent: March 22, 2005
    Assignees: 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
  • Patent number: 6860792
    Abstract: The invention is based on a hand power tool, in particular a manually operated right angle grinding machine or a manual circular saw, with a driver mechanism (12), which can operatively connect an inserted tool (16) to a drive shaft (18). The invention proposes that at least one sensor (10) can detect at least one procedural step in the changing of an inserted tool (16) and can produce a signal.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: March 1, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, Markus Heckmann
  • Publication number: 20040266325
    Abstract: The invention is based on an insert tool with a rotationally driveable disk-shaped hub and an abrasive disposed in particular in a radially outer region, in particular of the kind used for a cut-off wheel, a grinding disk, a rough grinding disk, a cutting disk, or an abrasive paper.
    Type: Application
    Filed: May 10, 2004
    Publication date: December 30, 2004
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Thomas Schomisch
  • Publication number: 20040258497
    Abstract: The invention is based on a tool holder for a power tool (10), in particular for a hand-guided power angle grinder, having a slaving device (12) by way of which an inserted tool (14), which has a disklike hub (64), can be operatively connected to a drive shaft (16), and having a fastening device (18) which has a holding position and a release position.
    Type: Application
    Filed: May 20, 2004
    Publication date: December 23, 2004
    Inventor: Harald Krondorfer