Patents by Inventor Manfred Hellbach
Manfred Hellbach 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: 7527272Abstract: A chuck is described, in particular for a hammer drill or chisel hammer, having a chuck body having an insertion opening for holding a tool shank, and a locking element for axially locking the tool shank in the insertion opening, the locking element being movable between a locked position and an unlocked position, and having an arresting pin, mounted in the locking element and radially displaceable between an arresting position and a release position, which axially arrests the locking element in its arresting position and axially releases it in its release position.Type: GrantFiled: June 2, 2006Date of Patent: May 5, 2009Assignee: Robert Bosch GmbHInventors: Karl Frauhammer, Manfred Hellbach, Heinz Schnerring, Joerg Friedrich, Andreas Strasser, Michael Mayer, Werner Huser
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Patent number: 7287601Abstract: A hand-operated power tool has a housing with a drive mechanism for driving a tool, a tool receptacle for receiving a tool, a handle assembly for grasping and handling located in a rear region which is remote from the tool receptacle and engaging the housing, wherein the handle assembly is vibration-damped with respect to the housing with components contained in the housing, at least and substantially in an axial direction.Type: GrantFiled: April 19, 2005Date of Patent: October 30, 2007Assignee: Robert Bosch GmbHInventors: Manfred Hellbach, Frank Mueller, Gerhard Meixner, Hubert Steinke, Juergen Lennartz
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Patent number: 7214010Abstract: A tool bit holder for a hand power tool has a tool bit holder body has a receiving bore for a tool bit shaft of a tool bit insert with at least one recess, a locking body snappable into place with the recess of the tool bit shaft and supported radially displaceably in the tool bit holder body; a slide sleeve supported resiliently in an axial direction and operatively connected to the locking body so that upon a motion of the slide sleeve counter to a spring force the locking body escapes out of the receiving bore, and a guide ring, wherein the locking body is caught in a first opening of the tool bit holder body and in a second opening at least partially covering the first opening, of the guide ring supported displaceably on the tool bit holder body.Type: GrantFiled: November 23, 2005Date of Patent: May 8, 2007Assignee: Robert Bosch GmbHInventors: Manfred Hellbach, Gerhard Meixner
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Publication number: 20070040339Abstract: A chuck is described, in particular for a hammer drill or chisel hammer, having a chuck body having an insertion opening for holding a tool shank, and a locking element for axially locking the tool shank in the insertion opening, the locking element being movable betveen a locked position and an unlocked position, and having an arresting pin, mounted in the locking element and radially displaceable between an arresting position and a release position, which axially arrests the locking element in its arresting position and axially releases it in its release position.Type: ApplicationFiled: June 2, 2006Publication date: February 22, 2007Inventors: Karl Frauhammer, Manfred Hellbach, Heinz Schnerring, Joerg Friedrich, Andreas Strasser, Michael Mayer, Werner Huser
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Publication number: 20060197293Abstract: A tool bit holder for a hand power tool has a tool bit holder body has a receiving bore for a tool bit shaft of a tool bit insert with at least one recess, a locking body snappable into place with the recess of the tool bit shaft and supported radially displaceably in the tool bit holder body; a slide sleeve supported resiliently in an axial direction and operatively connected to the locking body so that upon a motion of the slide sleeve counter to a spring force the locking body escapes out of the receiving bore, and a guide ring, wherein the locking body is caught in a first opening of the tool bit holder body and in a second opening at least partially covering the first opening, of the guide ring supported displaceably on the tool bit holder body.Type: ApplicationFiled: November 23, 2005Publication date: September 7, 2006Inventors: Manfred Hellbach, Gerhard Meixner
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Publication number: 20050247464Abstract: A hand-operated power tool (10), in particular a drill hammer and/or jackhammer, has a housing (11) which has a drive mechanism for driving a tool (12) that is receivable in a tool receptacle (13) and, in the rear region (14), remote from the tool receptacle (13), has a handle assembly (20) for grasping and handling that engages the housing (11). The handle assembly (20) is vibration-damped with respect to the housing (11), with the components contained in it, at least and substantially in the axial direction, by means of a vibration-damping device (FIG. 1).Type: ApplicationFiled: April 19, 2005Publication date: November 10, 2005Inventors: Manfred Hellbach, Frank Mueller, Gerhard Meixner, Hubert Steinke, Juergen Lennartz
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Patent number: 6918728Abstract: A snap ring for shafts or bores is proposed, which is able to be axially fixed in position by snapping into place in a circumferential groove. The snap ring is provided with a centering ring which, when the case of the snap ring is installed in the circumferential groove, extends with radial clearance to an annular clip of the snap ring, which is disposed approximately concentrically to the circumferential groove.Type: GrantFiled: July 1, 2000Date of Patent: July 19, 2005Assignee: Robert Bosch GmbHInventors: Karl Frauhammer, Manfred Hellbach, Frank Mueller, Heinz Schnerring, Joerg Friedrich, Andreas Strasser
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Publication number: 20050146097Abstract: The present invention is directed to a tool holder for a power tool, in particular for a drilling hammer or a chipping hammer, with a cavity (72) for receiving tools (12), a grooved shank (16), and at least one radially displaceable locking body (24, 50), which is insertable in a locking groove (22) of tool (12) and is closed on the shank end (20), and which is capable of being held in its locked position by a locking element (30, 58). It is proposed that, to create a large contact surface (40, 56), the locking body (24, 50) is positioned with its longitudinal axis (42, 54) at an angle (?, ?) to a longitudinal axis (18) of the cavity (72).Type: ApplicationFiled: December 6, 2004Publication date: July 7, 2005Inventors: Manfred Hellbach, Gerhard Meixner
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Patent number: 6527280Abstract: A hand held power tool formed as a hammer drill has a strikingly drivable tool holder having a base body, at least one locking body with which the base body is form-lockingly connectable and through which the base body is fixable in a rotary direction in at least two positions, the locking body being formed as a ring-shaped component.Type: GrantFiled: January 11, 2001Date of Patent: March 4, 2003Assignee: Robert Bosch GmbHInventors: Karl Frauhammer, Manfred Hellbach, Gerhard Meixner, Heinz Schnerring, Andreas Strasser
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Patent number: 6464234Abstract: The machine tool, especially a hammer drill or chisel, has a rotatable and/or axially movable tool holder (10,12) for a tool (16) having a grooved shaft. The tool holder (10,12) includes a base body (22); two radially movable locking bodies (18,20) held in the base body and movable into respective locking positions engaged in two closed grooves (26,28) in the tool shaft; a bearing member (32) movable between a bearing position for holding the locking bodies (18,20) in the locking position and a releasing position in which the locking bodies are movable out of the grooves; an operating member (36,38) connected with the bearing member (32) for moving the bearing member (32) and a resilient plastic guiding member (42,44) arranged to guide the locking bodies (18,20) radially outward during motion from the locking to unlocking position and to act on the locking bodies (18,20) with a radially inwardly directed spring force.Type: GrantFiled: January 11, 2001Date of Patent: October 15, 2002Assignee: Robert Bosch GmbHInventors: Karl Frauhammer, Manfred Hellbach, Heinz Schnerring, Karsten Blaier
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Publication number: 20010013682Abstract: The machine tool, especially a hammer drill or chisel, has a rotatable and/or axially movable tool holder (10,12) for a tool (16) having a grooved shaft. The tool holder (10,12) includes a base body (22); two radially movable locking bodies (18,20) held in the base body and movable into respective locking positions engaged in two closed grooves (26,28) in the tool shaft; a bearing member (32) movable between a bearing position for holding the locking bodies (18,20) in the locking position and a releasing position in which the locking bodies are movable out of the grooves; an operating member (36,38) connected with the bearing member (32) for moving the bearing member (32) and a resilient plastic guiding member (42,44) arranged to guide the locking bodies (18,20) radially outward during motion from the locking to unlocking position and to act on the locking bodies (18,20) with a radially inwardly directed spring force.Type: ApplicationFiled: January 11, 2001Publication date: August 16, 2001Inventors: Karl Frauhammer, Manfred Hellbach, Heinz Schnerring, Karsten Blaier
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Publication number: 20010008186Abstract: A hand held power tool formed as a hammer drill has a strikingly drivable tool holder having a base body, at least one locking body with which the base body is form-lockingly connectable and through which the base body is fixable in a rotary direction in at least two positions, the locking body being formed as a ring-shaped component.Type: ApplicationFiled: January 11, 2001Publication date: July 19, 2001Inventors: Karl Frauhammer, Manfred Hellbach, Gerhard Meixner, Heinz Schnerring, Andreas Strasser
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Patent number: 5996707Abstract: A hand power tool has a machine housing, a drive motor accommodated in the machine housing, a drive train connected with the drive motor and provided with a tool receptacle for rotation of a tool insertable in the tool receptacle, a detecting device for detecting an uncontrolled operation of the hand power tool by detecting a blocking of the tool in a workpiece with a resulting impact-like turning of the machine housing, a blocking device provided for the drive train and releasable by the detecting device, the locking device having a locking toothing arranged in the drive train and a blocking member movably supported in the machine housing and form-lockingly engagable in the locking toothing so as to non-rotatably fix the drive train relative to the machine housing, the detecting device being formed so that it produces an electrical release signal in an uncontrolled operation, the blocking device being releasable by the electrical release signal, and further has electromagnet device actuatable by the releaseType: GrantFiled: October 28, 1996Date of Patent: December 7, 1999Assignee: Robert Bosch GmbHInventors: Ludwig Thome, Karl Frauhammer, Manfred Hellbach, Gerhard Meixner, Heinz Schnerring, Manfred Klein
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Patent number: 5111890Abstract: A power hammer drill includes a tool holder and an air cushion striking mechanism for driving a tool and including a striker, a reciprocating piston for displacing the striker, and an axially displaceable guide tube for guiding the piston. A device for holding the striker in a forward position thereof adjacent to the tool holder in an idling condition of the hammer drill is provided in the hammer drill. The device has a guide element fixed in the drill housing for guiding the guide tube. The guide tube has a control opening for venting the air cushion and which remains in open or closed condition dependent on axial position of the guide tube.Type: GrantFiled: January 29, 1991Date of Patent: May 12, 1992Assignee: Robert Bosch GmbHInventors: Ulrich Ranger, Karl Wanner, Johann Kaltenecker, Manfred Hellbach, Gerhard Meixner