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).

  • Patent number: 8181973
    Abstract: Embodiments are disclosed for a tool-less clamping apparatus for a reciprocating tool having a reciprocating spindle having a center axis and at least one radially oriented aperture and a receiving slot at its forward end for receiving a tool accessory, the apparatus having an unclamped position and a clamped position, and comprising a hollow generally cylindrical sleeve secured to the spindle, a hollow generally cylindrical collar configured to fit on the sleeve and being rotatable relative to the spindle and the sleeve, the collar having an inner cam surface that increases in radius from the axis through a first predetermined circumferential arc in a first direction, a spring operatively connected to provide a biasing force to the collar toward its clamped position, and a detent pin positioned in the spindle aperture and configured to engage a hole in the tool accessory and thereby firmly hold the tool accessory in the apparatus when urged into contact with the tool accessory.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: May 22, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Zheng Dezheng, Timothy P. Michel, Harald Krondorfer
  • Patent number: 8167689
    Abstract: The invention is based on a system with a tool-holding fixture, which fixture has a slaving device (12) by way of which an inserted tool (14) can be connected operatively to a drive shaft (16), and with an inserted tool (14) which can be connected operatively to the slaving device (12) via at least one detent element (20) that is supported movably counter to a spring element (18), which detent element snaps into place in an operating position of the inserted tool (14) and fixes the inserted tool (14) by positive engagement. It is proposed that the tool-holding fixture and the inserted tool (14) have at least two corresponding shaped elements (22, 24), adapted to one another, to facilitate installation of the inserted tool (14).
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: May 1, 2012
    Assignees: Robert Bosch GmbH, Tyrolit Schleigmitel Swarowski K.G.
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Thomas Schomisch
  • Patent number: 8162073
    Abstract: A device for impacting a fastener in one embodiment includes a drive mechanism configured to impact a fastener, a lever arm pivotable between a first position and a second position, and a motor including a plurality of permanent magnets mounted on a rotatable housing, the motor mounted on the lever arm such that when the lever arm is in the first position, the rotatable motor housing is isolated from the drive mechanism and when the lever arm is in the second position, the rotatable motor housing is positioned to transfer rotational energy to the drive mechanism.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: April 24, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, John DeCicco, Eric Hlinka
  • Publication number: 20120066858
    Abstract: An extractor cleaning machine including a base or foot movable along a surface to be cleaned and a handle pivotally coupled to the foot for movement between an upright position and a reclined position. The handle includes a tank tray having an inlet and a drain. A channel communicates with the drain and extends away from the tank tray. A distributor communicates with the inlet and is operable to distribute cleaning fluid to the surface. A supply tank is removably coupled to the handle and has an outlet in fluid communication with the inlet when the supply tank is coupled to the handle. The supply tank is at least partially supported by the tank tray and the tank tray is configured to collect fluid spilt from the supply tank and to divert the fluid away from the tank tray by way of the channel.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 22, 2012
    Inventors: Harald Krondorfer, Robert A. Salo, Euan Macleod, Patrick Quinn, John Bantum
  • Publication number: 20120066859
    Abstract: An extractor cleaning machine including a base or foot moveable along a surface to be cleaned, and a handle pivotally coupled to the foot and moveable between an upright storage position and an inclined operating position. The cleaning machine also includes a recovery tank insertable into a space between the foot and the handle. The handle is positioned directly over at least a portion of the recovery tank when the handle is in the upright storage position, and the recovery tank is removable from the space while the handle is in the upright storage position.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 22, 2012
    Inventors: Jeffrey S. Louis, David Chaney, Harald Krondorfer
  • Patent number: 8136558
    Abstract: A routing machine comprises a first plunge post, a second plunge post, and an electric motor moveable on the routing machine relative to the first plunge post and the second plunge post. A first sleeve bearing is slideably positioned on the first plunge post with a first clearance defined between the first sleeve bearing and the first plunge post. The first sleeve bearing is configured to slide along the first plunge post when the electric motor moves relative to the first plunge post. A second sleeve bearing is slideably positioned on the second plunge post with a second clearance defined between the second sleeve bearing and the second plunge post. The second sleeve bearing is configured to slide along the second plunge post when the electric motor moves relative to the second plunge post. At least one flexible member extends from the second sleeve bearing toward the second plunge post.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: March 20, 2012
    Assignee: Robert Bosch GmbH
    Inventors: David Pozgay, Harald Krondorfer, Tim Truesdale, Arturo Gonzalez
  • Patent number: 8136606
    Abstract: A device for impacting a fastener in one embodiment includes a frame, a motor mounted to the frame and including a drive shaft defining a drive shaft axis, a lever arm including a pivot axis parallel with the drive shaft axis, a flywheel rotatably mounted on the lever arm and operably connected to the motor for storing energy received from the motor, a drive mechanism for impacting a fastener, and a solenoid configured to pivot the lever arm between a first position wherein the flywheel is spaced apart from the drive mechanism and a second position wherein the flywheel can contact the drive mechanism.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 20, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, Eric Hlinka, John DeCicco
  • Publication number: 20120024424
    Abstract: A routing machine comprises a base unit and a motor unit releasably connected to the base unit. The base unit includes a handle and a first electrical connector. The motor unit includes an electric motor, motor control circuitry configured to energize or de-energize the electric motor, and a second electrical connector connected to the motor control circuitry. The second electrical connector is configured to engage the first electrical connector when the motor unit is properly seated on the base unit. An electric switch is positioned on the base unit. The motor control circuitry is configured to deliver electric power to the electric motor when the switch is in an on position. The motor control circuitry is configured to not provide electric power to the electric motor when the switch is in an off position.
    Type: Application
    Filed: October 10, 2011
    Publication date: February 2, 2012
    Applicants: ROBERT BOSCH GMBH, CREDO TECHNOLOGY CORPORATION
    Inventors: David Pozgay, James B. Stevens, Harald Krondorfer, Jeff Schreiner, Martin Feldman, Tim Truesdale, Arturo Gonzalez, Deborah Brown, Erick Higashi, Charlie Ren
  • Patent number: 8096857
    Abstract: A power tool, in particular a right-angle grinder, includes a motor and a gear, the motor and/or the gear embodied as a mountable function module. The gear is embodied as a mountable function module, with a gear input shaft supported in a gearbox, and the gear input shaft is fixed in the gearbox via at least one detent connection.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: January 17, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Kersten Heckmann, legal representative, Thomas Schomisch
  • Patent number: 8061718
    Abstract: A bit holder for a rotary tool is disclosed herein. In one embodiment, the bit holder comprises a drive shaft with an elongated bit channel configured to receive a tool bit for the rotary tool. A cavity is provided in a peripheral wall of the drive shaft. The cavity extends in a radial direction from the bit channel to an outer portion of the drive shaft. A moveable lock member is positioned in the cavity of the drive shaft. A collet is positioned in the bit channel apart from the cavity. The collet includes a collapsible end portion configured to clamp down on the tool bit. A collet nut rotatably engages the drive shaft and is moveable between a release position and a lock position. In the lock position the collet nut clamps the collapsible end portion of the collet while also forcing the lock member into the bit cavity.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: November 22, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Harald Krondorfer
  • Patent number: 8033307
    Abstract: A routing machine comprises a base unit and a motor unit releasably connected to the base unit. The base unit includes a handle and a first electrical connector. The motor unit includes an electric motor, motor control circuitry configured to energize or de-energize the electric motor, and a second electrical connector connected to the motor control circuitry. The second electrical connector is configured to engage the first electrical connector when the motor unit is properly seated on the base unit. An electric switch is positioned on the base unit. The motor control circuitry is configured to deliver electric power to the electric motor when the switch is in an on position. The motor control circuitry is configured to not provide electric power to the electric motor when the switch is in an off position.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: October 11, 2011
    Assignee: Robert Bosch GmbH
    Inventors: David Pozgay, James B. Stevens, Harald Krondorfer, Jeff Schreiner, Martin Feldman, Tim Truesdale, Arturo Gonzalez, Deborah Brown, Erick Higashi, Charlie Ren
  • Patent number: 7975777
    Abstract: A device for impacting a fastener in one embodiment includes a drive channel, a cylinder opening at an end portion to the drive channel, a microcellular polyurethane elastomer (MPE) bumper fixedly positioned at the end portion of the cylinder, the MPE bumper including a drive bore extending therethrough and aligned with the drive channel, and an outer wall defining a plurality of grooves extending radially about the MPE bumper, and a drive mechanism including a drive blade aligned with the drive bore.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: July 12, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, Yizhuo Zhang
  • Publication number: 20110120740
    Abstract: A power tool includes a body and a housing surrounding at least a portion of the body. The power tool also includes a first isolator positioned between the body and the housing and in contact with the body and the housing. The power tool also includes a first fastener connected to the housing to position the first isolator with respect to the housing.
    Type: Application
    Filed: February 5, 2008
    Publication date: May 26, 2011
    Inventors: Jaime Moreno, Harald Krondorfer, Holger Frank
  • Patent number: 7934565
    Abstract: A device for impacting a fastener in one embodiment includes a lever arm pivotable between a first position whereat a flywheel is spaced apart from a drive mechanism and a second position whereat the flywheel can contact the drive mechanism, a motor operably connected to the flywheel for storing energy in the flywheel, a trigger sensor assembly for generating a trigger signal indicative of the position of a trigger, a work contact element (WCE) sensor for generating a WCE signal indicative of the position of a WCE, a memory including program instructions, and a processor operably connected to the memory for executing the program instructions to (i) energize the motor based upon the WCE signal, and (ii) pivot the lever arm based upon the trigger signal.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: May 3, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, John DeCicco, Eric Hlinka
  • Publication number: 20110097978
    Abstract: The invention is based on a system with a tool-holding fixture, which fixture has a slaving device (12) by way of which an inserted tool (14) can be connected operatively to a drive shaft (16), and with an inserted tool (14) which can be connected operatively to the slaving device (12) via at least one detent element (20) that is supported movably counter to a spring element (18), which detent element snaps into place in an operating position of the inserted tool (14) and fixes the inserted tool (14) by positive engagement. It is proposed that the tool-holding fixture and the inserted tool (14) have at least two corresponding shaped elements (22, 24), adapted to one another, to facilitate installation of the inserted tool (14).
    Type: Application
    Filed: April 2, 2003
    Publication date: April 28, 2011
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann
  • Publication number: 20110095493
    Abstract: A clamping apparatus has been developed for coupling a tool member to the output shaft of a power tool without the use of auxiliary hands tools or a shaft-lock lever. The clamping apparatus includes a clamp member and a piezoelectric element. The clamp member is coupled to an output shaft of a motor. The piezoelectric element opposes the first clamp member and is configured to change from a first state to a second state in response to being coupled to a source of electrical energy.
    Type: Application
    Filed: October 26, 2009
    Publication date: April 28, 2011
    Applicants: CREDO TECHNOLOGY CORPORATION, ROBERT BOSCH GmbH
    Inventors: Harald Krondorfer, Roland Hund, Alexandre Maciel
  • Patent number: 7926585
    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: Grant
    Filed: November 3, 2006
    Date of Patent: April 19, 2011
    Assignee: Robert Bosch GmbH
    Inventors: David Pozgay, Harald Krondorfer, John B. Freese
  • Patent number: 7905377
    Abstract: A device for impacting a fastener in one embodiment includes a drive mechanism, a flywheel pivotable between a first flywheel position whereat the flywheel is not in contact with the drive mechanism and a second flywheel position whereat the flywheel contacts the drive mechanism, a motor operably connected to the flywheel, a trigger movable between a first trigger position and a second trigger position, and a WCE assembly movable between a first WCE position and a second WCE position, the WCE assembly configured such that (i) when the trigger is in the first trigger position and the WCE assembly is in the first WCE position, the WCE assembly mechanically engages the trigger to preclude movement of the trigger out of the first position, and (ii) when the WCE assembly is in the second WCE assembly position, the WCE assembly does not mechanically engage the trigger.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 15, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, John DeCicco, Eric Hlinka, Chia Sheng Liang
  • Patent number: 7828185
    Abstract: The invention relates to a hand power tool (2), having a housing (6), an electric motor accommodated in the housing (6), and a battery pack (4), releasably locked to the housing (6), for supplying the electric motor with electric current. At least one spring/damping element (38), mounted between the battery pack (4) and the housing (6) of the hand power tool (2), is provided, for damping vibration and -or eliminating a locking-dictated play between the battery pack (4) and the housing (6).
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: November 9, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Hofmann, Harald Krondorfer, Markus Heckmann, Kersten Heckmann, legal representative, Joachim Schadow, Thomas Schomisch
  • Publication number: 20100213232
    Abstract: A device for impacting a fastener in one embodiment includes a drive mechanism configured to impact a fastener, a lever arm pivotable between a first position and a second position, and a motor including a plurality of permanent magnets mounted on a rotatable housing, the motor mounted on the lever arm such that when the lever arm is in the first position, the rotatable motor housing is isolated from the drive mechanism and when the lever arm is in the second position, the rotatable motor housing is positioned to transfer rotational energy to the drive mechanism.
    Type: Application
    Filed: February 20, 2009
    Publication date: August 26, 2010
    Applicants: CREDO TECHNOLOGY CORPORATION, ROBERT BOSCH GMBH
    Inventors: Harald Krondorfer, John DeCicco, Eric Hlinka