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EP2020279A1 - Momentum lever - Google Patents

Momentum lever Download PDF

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Publication number
EP2020279A1
EP2020279A1 EP08104135A EP08104135A EP2020279A1 EP 2020279 A1 EP2020279 A1 EP 2020279A1 EP 08104135 A EP08104135 A EP 08104135A EP 08104135 A EP08104135 A EP 08104135A EP 2020279 A1 EP2020279 A1 EP 2020279A1
Authority
EP
European Patent Office
Prior art keywords
lever
handle
side lever
moment
contact surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08104135A
Other languages
German (de)
French (fr)
Inventor
Sören Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP2020279A1 publication Critical patent/EP2020279A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0057—Devices for securing hand tools to the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention designates a torque lever which can be fixed to the housing flange of an at least partially rotating hand-held power tool.
  • GB2124536 is directly on the outer housing of a power tool via a pivot joint a longitudinal axis of rotation pivotally mounted lever mounted at the end of which is arranged either radially or tangentially extending side handle.
  • DE10106050 is a tangential to the rotation axis oriented bracket handle rigidly mounted with a clamp on the housing flange of a hand drill.
  • the side handle is connected to the clamp on a rod with a body stop for the upper body of the user.
  • AT389668B is for positioning a Dosensenkers a fitting axially slidably mounted with a clamp on the housing flange, after the DE3928541 a solid guide pin for guiding in a borehole.
  • EP0234066 are for receiving the torque on the clamp two diametrically opposed radial side lever arranged, each having axially displaceable support legs end, which are with their axially oriented contact surfaces on the ground.
  • the support legs lie on the side lying on the ground to be drilled profile support and thus transferred to this torque. This is not possible with diamond core drilling in the ground.
  • the task consists in the realization of a hand-held diamond core drilling in the ground suitable torque lever.
  • a moment lever for mounting on the (axial) housing flange of an at least partially rotating about a rotation axis hand tool suitable clamp and a connected thereto radial side lever having an axially oriented Kontak Chemistry end, the side lever via a pivot joint axially pivoting with the Clamp is connected.
  • the contact surface of the side lever Due to the swivel movement of the side lever made possible by the swivel joint, the contact surface of the side lever always has an adhesive effect on the substrate, irrespective of the axial feed of the hand tool, for example on rough concrete.
  • This stiction can be intuitively increased by the contact pressure of the side lever (for example, by hand or with a raised sole of the user) to derive the torque occurring during diamond core drilling safely to the ground.
  • the hand tool machine acoustically couples to the ground via the side lever and the contact surface, whereby any vibrations of the hand tool are damped.
  • the hand tool can be easier to guide by the underground contact in the remaining degrees of freedom and also the drilling is facilitated by the fixed point of the underground contact.
  • the contact surface is gummed, whereby the static friction is increased at the same contact force.
  • the contact surface is formed as a rolling surface of a radially rollable contact roller, whereby the radial movement of the contact surface occurring during the feed is low in friction.
  • the contact roller is manually fracarretierbar, whereby this forms a firm fixed point when drilling.
  • the side lever is curved towards the (assembled) hand tool, whereby the point of application lying in the middle longitudinal third is closer to the machine side.
  • the machine side on the side lever further advantageously in the middle longitudinal third, a handle arranged, whereby the contact pressure is ergonomically applicable.
  • the handle is oriented tangentially, whereby this is indeed suitable for the transmission of axial, but not of tangential forces on the user, whereby the handle is fatigued.
  • the handle is a (pivoted festlegbarer) closed bow handle, whereby the user's hand is protected by the two outer bracket against contacts (from tangential direction).
  • the moment lever 1 has a radial side lever 5, the end has an axially oriented rubberized contact surface 6 of a radially rollable and lubarretierbaren contact roller 9, which rests on the rough surface 11 friction-locked.
  • the side lever 5 is connected via a pivot joint 7 along the axis of rotation A pivotally connected to the clamp 4.
  • the side of the hand tool 3 curved side lever 5 has in the middle longitudinal thirds on the machine side a handle 10 which extends tangentially (perpendicular to the plane) as well as a closed handle handle with two (the second is in the display plane behind the first) handlebars 12 formed and with respect the side lever 5 is pivoted fixed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

The lever (1) has a gripper clamp (4) for mounting at a housing flange (2) of a hand tool machine (3) rotating around a rotational axis (A). A radial side lever (5) is connected with the gripper clamp in an axially rotatable manner by a rotatable hinge (7). The radial side lever comprises an axially oriented contact surface (6) at end sides of the radial side lever, where the contact surface is designed as a roller surface of a contact roller (9). A hand tool (10) is arranged at the radial side lever and tangentially oriented.

Description

Die Erfindung bezeichnet einen an den Gehäuseflansch einer zumindest teilweiser drehenden Handwerkzeugmaschine festlegbaren Momenthebel.The invention designates a torque lever which can be fixed to the housing flange of an at least partially rotating hand-held power tool.

Üblicherweise wird bei drehenden Handwerkzeugmaschinen, wenn diese grosse Drehmomente übertragen sollen, am Gehäuseflansch mit einer Klemmschelle ein radial zur Drehachse verlaufender Seitenhandgriff befestigt. Dadurch stellt der Seitenhandgriff einen Momenthebel bezüglich des letztendlich vom handhabenden Nutzer aufgenommenen Drehmoments dar.Usually, in rotating hand tool machines, if they are to transmit large torques, a housing handle with a clamp attached radially to the axis of rotation extending side handle. As a result, the side handle represents a momentary lever with respect to the torque ultimately absorbed by the handling user.

Beim handgeführten Diamantkernbohren im Untergrund, bei dem mit einer handgeführten, drehenden Handwerkzeugmaschine eine Kernbohrkrone angetrieben wird, treten bohrverfahrensbedingt hohe Drehmomente über den gesamten Bohrprozess auf. Hohe Drehmomentspitzen, wie sie beim Verkanten der Kernbohrkrone im Kreisringloch auftreten, werden bei modernen Handwerkzeugmaschinen durch aktive oder passive Sicherheitskupplungen sicher vermieden.In the case of hand-guided diamond core drilling in the underground, in which a core drill bit is driven with a hand-held, rotating hand tool, high torques occur during the entire drilling process due to the drilling process. High torque peaks, such as occur when tilting the core bit in the circular ring hole, are safely avoided in modern hand tool machines by active or passive safety clutches.

Nach der GB2124536 ist direkt am Aussengehäuse einer Handwerkzeugmaschine über ein Schwenkgelenk ein längs der Drehachse verschwenkbarer Moment hebel befestigt, an dessen Ende der sich wahlweise radial oder tangential erstreckende Seitenhandgriff angeordnet ist.After GB2124536 is directly on the outer housing of a power tool via a pivot joint a longitudinal axis of rotation pivotally mounted lever mounted at the end of which is arranged either radially or tangentially extending side handle.

Nach der DE10106050 ist ein tangential zur Drehachse orientierter Bügel handgriff mit einer Klemmschelle am Gehäuseflansch einer Handbohrmaschine starr befestigt.After DE10106050 is a tangential to the rotation axis oriented bracket handle rigidly mounted with a clamp on the housing flange of a hand drill.

Nach der DE3138516 ist der Seitenhandgriff an der Klemmschelle über eine Stange mit einem Körper anschlag für den Oberkörper des Nutzers verbunden.After DE3138516 the side handle is connected to the clamp on a rod with a body stop for the upper body of the user.

Nach der AT389668B ist zur Positionierung eines Dosensenkers ein Passstück axial verschieblich mit einer Klemmschelle am Gehäuseflansch befestigt, nach der DE3928541 ein fester Führungsstift zur Führung in einem Bohrloch.After AT389668B is for positioning a Dosensenkers a fitting axially slidably mounted with a clamp on the housing flange, after the DE3928541 a solid guide pin for guiding in a borehole.

Nach der EP0234066 sind zur Aufnahme des Drehmoments an der Klemmschelle zwei diametral gegenüberliegende radiale Seitenhebel angeordnet, die jeweils endseitig axial verschiebliche Stützbeine aufweisen, die mit ihren axial orientierten Kontaktflächen auf dem Untergrund stehen. Die Stützbeine liegen seitlich an dem auf dem Untergrund liegenden zu bohrenden Profilträger an und übertragen somit auf diesen das Drehmoment. Dies ist beim Diamantkernbohren im Untergrund nicht möglich.After EP0234066 are for receiving the torque on the clamp two diametrically opposed radial side lever arranged, each having axially displaceable support legs end, which are with their axially oriented contact surfaces on the ground. The support legs lie on the side lying on the ground to be drilled profile support and thus transferred to this torque. This is not possible with diamond core drilling in the ground.

Die Aufgabe besteht in der Realisierung eines zum handgeführten Diamantkernbohren im Untergrund geeigneten Moment hebels.The task consists in the realization of a hand-held diamond core drilling in the ground suitable torque lever.

Die Aufgabe wird im Wesentlichen durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of claim 1. Advantageous developments emerge from the subclaims.

So weist ein Moment hebel eine zur Montage am (axialen) Gehäuseflansch einer zumindest teilweise um eine Drehachse drehenden Handwerkzeugmaschine geeignete Klemmschelle und einen mit dieser verbundenen radialen Seitenhebel auf, der endseitig eine axial orientierte Kontakfläche aufweist, wobei der Seitenhebel über ein Schwenkgelenk axial schwenkbar mit der Klemmschelle verbunden ist.Thus, a moment lever for mounting on the (axial) housing flange of an at least partially rotating about a rotation axis hand tool suitable clamp and a connected thereto radial side lever having an axially oriented Kontakfläche end, the side lever via a pivot joint axially pivoting with the Clamp is connected.

Durch die durch das Schwenkgelenk ermöglichte Schwenkbewegung des Seitenhebels liegt, unabhängig vom axialen Vorschub der Handwerkzeugmaschine, die Kontaktfläche des Seitenhebels immer haftreibend auf dem Untergrund auf, bspw. auf rauhem Beton. Diese Haftreibung kann über den Anpressdruck des Seitenhebels (bspw. mit der Hand oder mit einer aufgestellten Fusssohle des Nutzers) intuitiv vergrössert werden, um das beim Diamantkernbohren auftretende Drehmoment sicher zum Untergrund abzuleiten. Zudem koppelt die Handwerkzeugmaschine über den Seitenhebel und die Kontaktfläche akustisch an den Untergrund an, wodurch allfällige Vibrationen der Handwerkzeugmaschine gedämpft werden. Zudem lässt sich die Handwerkzeugmaschine durch den Untergrundkontakt in den verbleibenden Freiheitsgraden einfacher führen und auch das Anbohren wird durch den Fixpunkt des Untergrundkontaktes erleichtert.Due to the swivel movement of the side lever made possible by the swivel joint, the contact surface of the side lever always has an adhesive effect on the substrate, irrespective of the axial feed of the hand tool, for example on rough concrete. This stiction can be intuitively increased by the contact pressure of the side lever (for example, by hand or with a raised sole of the user) to derive the torque occurring during diamond core drilling safely to the ground. In addition, the hand tool machine acoustically couples to the ground via the side lever and the contact surface, whereby any vibrations of the hand tool are damped. In addition, the hand tool can be easier to guide by the underground contact in the remaining degrees of freedom and also the drilling is facilitated by the fixed point of the underground contact.

Vorteilhaft ist die Kontaktfläche gummiert, wodurch bei gleicher Anpresskraft die Haftreibung vergrössert wird.Advantageously, the contact surface is gummed, whereby the static friction is increased at the same contact force.

Vorteilhaft ist die Kontaktfläche als Rollfläche einer radial rollbaren Kontaktrolle ausgebildet, wodurch die beim Vorschub auftretende Radialbewegung der Kontaktfläche reibungsarm ist. Vorteilhaft ist die Kontaktrolle manuell dreharretierbar, wodurch diese beim Anbohren einen am Untergrund festen Fixpunkt ausbildet.Advantageously, the contact surface is formed as a rolling surface of a radially rollable contact roller, whereby the radial movement of the contact surface occurring during the feed is low in friction. Advantageously, the contact roller is manually dreharretierbar, whereby this forms a firm fixed point when drilling.

Vorteilhaft ist der Seitenhebel zur (montierten) Handwerkzeugmaschine hin gekrümmt, wodurch der im mittleren Längsdrittel liegende Angriffspunkt näher maschinenseitig ist.Advantageously, the side lever is curved towards the (assembled) hand tool, whereby the point of application lying in the middle longitudinal third is closer to the machine side.

Vorteilhaft ist maschinenseitig am Seitenhebel, weiter vorteilhaft im mittleren Längsdrittel, ein Handgriff angeordnet, wodurch die Anpresskraft ergonomisch aufbringbar ist.Advantageously, the machine side on the side lever, further advantageously in the middle longitudinal third, a handle arranged, whereby the contact pressure is ergonomically applicable.

Vorteilhaft ist der Handgriff tangential orientiert, wodurch dieser zwar zur Übertragung von axialen, nicht aber von tangentialen Kräften auf den Nutzer taugt, wodurch der Handgriff ermüdungsarm ist.Advantageously, the handle is oriented tangentially, whereby this is indeed suitable for the transmission of axial, but not of tangential forces on the user, whereby the handle is fatigued.

Vorteilhaft ist der Handgriff ein (verschwenkt festlegbarer) geschlossener Bügel handgriff, wodurch die Hand des Nutzers durch die beiden Aussenbügel vor Kontakten (aus Tangentialrichtung) geschützt ist.Advantageously, the handle is a (pivoted festlegbarer) closed bow handle, whereby the user's hand is protected by the two outer bracket against contacts (from tangential direction).

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit einer Darstellung eines Moment hebels einer HandwerkzeugmaschineThe invention will be explained in more detail with respect to an advantageous embodiment with a representation of a torque lever of a power tool

Nach der Darstellung ist ein Moment hebel 1 am Gehäuseflansch 2 einer, eine Kernbohrkrone 8 um eine Drehachse A drehend antreibende, Handwerkzeugmaschine 3 über eine passende Klemmschelle 4 montierbar festgelegt. Der Moment hebel 1 weist einen radialen Seitenhebel 5 auf, der endseitig eine axial orientierte gummierte Kontakfläche 6 einer radial rollbaren sowie dreharretierbaren Kontaktrolle 9 aufweist, die haftreibschlüssig auf dem rauhen Untergrund 11 anliegt. Der Seitenhebel 5 ist über ein Schwenkgelenk 7 längs zur Drehachse A verschwenkbar mit der Klemmschelle 4 verbunden. Der zur Handwerkzeugmaschine 3 hin gekrümmte Seitenhebel 5 weist im mittleren Längsdrittel maschinenseitig einen Handgriff 10 auf, der sich tangential (senkrecht zur Darstellungsebene) erstreckt sowie als geschlossener Bügel handgriff mit zwei (der zweite liegt in der Darstellungsebene hinter dem ersten) Griffbügeln 12 ausgebildet und bezüglich des Seitenhebels 5 verschwenkt festlegbar ist.As shown, a moment lever 1 on the housing flange 2 a, a core bit 8 about a rotational axis A drivingly rotating, power tool 3 via a suitable clamp 4 fixed mountable. The moment lever 1 has a radial side lever 5, the end has an axially oriented rubberized contact surface 6 of a radially rollable and dreharretierbaren contact roller 9, which rests on the rough surface 11 friction-locked. The side lever 5 is connected via a pivot joint 7 along the axis of rotation A pivotally connected to the clamp 4. The side of the hand tool 3 curved side lever 5 has in the middle longitudinal thirds on the machine side a handle 10 which extends tangentially (perpendicular to the plane) as well as a closed handle handle with two (the second is in the display plane behind the first) handlebars 12 formed and with respect the side lever 5 is pivoted fixed.

Claims (8)

Momenthebel mit einer zur Montage am Gehäuseflansch (2) einer zumindest teilweise um eine Drehachse (A) drehenden Handwerkzeugmaschine (3) geeignete Klemmschelle (4) und mit einem, mit dieser verbundenen, radialen Seitenhebel (5), der endseitig eine axial orientierte Kontakfläche (6) aufweist, dadurch gekennzeichnet, dass der Seitenhebel (5) über ein Schwenkgelenk (7) axial schwenkbar mit der Klemmschelle (4) verbunden ist.Momentary lever with a clamping clamp (4) suitable for mounting on the housing flange (2) of a hand-held power tool (3) rotating at least partially about a rotation axis (A) and having a radial side lever (5) connected thereto, the end face having an axially oriented contact surface (5). 6), characterized in that the side lever (5) via a pivot joint (7) is axially pivotally connected to the clamp (4). Moment hebel nach Anspruch 1, dadurch gekennzeichnet, dass die Kontaktfläche (6) gummiert ist.Moment lever according to claim 1, characterized in that the contact surface (6) is rubberized. Moment hebel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kontaktfläche (6) als Rollfläche einer Kontaktrolle (9) ausgebildet ist.Moment lever according to claim 1 or 2, characterized in that the contact surface (6) is designed as a rolling surface of a contact roller (9). Moment hebel nach Anspruch 3, dadurch gekennzeichnet, dass die Kontaktrolle manuell dreharretierbar ist.Moment lever according to claim 3, characterized in that the contact roller is manually dreharretierbar. Moment hebel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Seitenhebel (5) gekrümmt ist.Moment lever according to one of claims 1 to 4, characterized in that the side lever (5) is curved. Moment hebel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass am Seitenhebel (5) ein Handgriff (10) angeordnet ist.Moment lever according to one of claims 1 to 5, characterized in that on the side lever (5) a handle (10) is arranged. Moment hebel nach Anspruch 6, dadurch gekennzeichnet, dass der Handgriff (10) tangential orientiert ist.Moment lever according to claim 6, characterized in that the handle (10) is oriented tangentially. Momenthebel nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Handgriff (10) ein geschlossener Bügel handgriff ist.Moment lever according to claim 6 or 7, characterized in that the handle (10) is a closed handle handle.
EP08104135A 2007-07-31 2008-05-28 Momentum lever Withdrawn EP2020279A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710000417 DE102007000417A1 (en) 2007-07-31 2007-07-31 moment arm

Publications (1)

Publication Number Publication Date
EP2020279A1 true EP2020279A1 (en) 2009-02-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104135A Withdrawn EP2020279A1 (en) 2007-07-31 2008-05-28 Momentum lever

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EP (1) EP2020279A1 (en)
DE (1) DE102007000417A1 (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552239A (en) * 1968-06-12 1971-01-05 Roy L Yeaman Portable drill press
DE3138516A1 (en) 1981-01-29 1982-08-19 Robert 5446 Engeln Wolff Mobile holder for a powered hand drill
DE3227445A1 (en) * 1981-07-24 1983-02-10 Kabushiki Kaisha Imai Tetsukojo, Ohta, Gunma Guide device for electric hand drills
GB2124536A (en) 1982-08-05 1984-02-22 Bosch Gmbh Robert A hand machine tool provided with an auxiliary handle
US4462282A (en) * 1982-11-15 1984-07-31 Dresser Industries, Inc. Power tool with torque reaction bar
EP0234066A1 (en) 1986-01-20 1987-09-02 Karl Arne Karlsson Apparatus for hand drilling
DE8809840U1 (en) * 1988-08-02 1989-11-30 Robert Bosch Gmbh, 7000 Stuttgart Electric hand tool
AT389668B (en) 1986-12-01 1990-01-10 Kaiser Gmbh & Co Kg Auxiliary device for a portable drill or the like
DE3928541A1 (en) 1988-08-29 1990-03-01 Walter Schweikert Mounting for hand electric machine tool - comprises collar with cross pin and threaded socket for hand grip
DE10106050A1 (en) 2001-02-09 2002-08-14 Hilti Ag Hand machine tool with an additional handle
US20020132570A1 (en) * 2001-03-13 2002-09-19 The Boeing Company Ergonomic sander handle apparatus and method
EP1400317A1 (en) * 2002-09-19 2004-03-24 Atlas Copco Electric Tools GmbH Auxiliary handle
US20050034276A1 (en) * 2003-08-11 2005-02-17 Badiali John A. Stabilizer for rotary tools

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552239A (en) * 1968-06-12 1971-01-05 Roy L Yeaman Portable drill press
DE3138516A1 (en) 1981-01-29 1982-08-19 Robert 5446 Engeln Wolff Mobile holder for a powered hand drill
DE3227445A1 (en) * 1981-07-24 1983-02-10 Kabushiki Kaisha Imai Tetsukojo, Ohta, Gunma Guide device for electric hand drills
GB2124536A (en) 1982-08-05 1984-02-22 Bosch Gmbh Robert A hand machine tool provided with an auxiliary handle
US4462282A (en) * 1982-11-15 1984-07-31 Dresser Industries, Inc. Power tool with torque reaction bar
EP0234066A1 (en) 1986-01-20 1987-09-02 Karl Arne Karlsson Apparatus for hand drilling
AT389668B (en) 1986-12-01 1990-01-10 Kaiser Gmbh & Co Kg Auxiliary device for a portable drill or the like
DE8809840U1 (en) * 1988-08-02 1989-11-30 Robert Bosch Gmbh, 7000 Stuttgart Electric hand tool
DE3928541A1 (en) 1988-08-29 1990-03-01 Walter Schweikert Mounting for hand electric machine tool - comprises collar with cross pin and threaded socket for hand grip
DE10106050A1 (en) 2001-02-09 2002-08-14 Hilti Ag Hand machine tool with an additional handle
US20020132570A1 (en) * 2001-03-13 2002-09-19 The Boeing Company Ergonomic sander handle apparatus and method
EP1400317A1 (en) * 2002-09-19 2004-03-24 Atlas Copco Electric Tools GmbH Auxiliary handle
US20050034276A1 (en) * 2003-08-11 2005-02-17 Badiali John A. Stabilizer for rotary tools

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