EP1512494A1 - Screwdriver - Google Patents

Screwdriver Download PDF

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Publication number
EP1512494A1
EP1512494A1 EP03028907A EP03028907A EP1512494A1 EP 1512494 A1 EP1512494 A1 EP 1512494A1 EP 03028907 A EP03028907 A EP 03028907A EP 03028907 A EP03028907 A EP 03028907A EP 1512494 A1 EP1512494 A1 EP 1512494A1
Authority
EP
European Patent Office
Prior art keywords
profile
screwdriver according
spring
output tip
outer contour
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.)
Granted
Application number
EP03028907A
Other languages
German (de)
French (fr)
Other versions
EP1512494B1 (en
Inventor
Otmar Karle
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.)
Wiha Werkzeuge GmbH
Original Assignee
Wiha Werkzeuge GmbH
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 Wiha Werkzeuge GmbH filed Critical Wiha Werkzeuge GmbH
Publication of EP1512494A1 publication Critical patent/EP1512494A1/en
Application granted granted Critical
Publication of EP1512494B1 publication Critical patent/EP1512494B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02Arrangements for handling screws or nuts
    • B25B23/08Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/105Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00Screwdrivers
    • B25B15/001Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02Arrangements for handling screws or nuts
    • B25B23/08Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/105Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
    • B25B23/108Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit the driving bit being a Philips type bit, an Allen type bit or a socket

Definitions

  • the invention relates to a screwdriver according to the preamble of claim 1.
  • the invention relates to screwdrivers whose output tip is formed with a profile, so that the output tip axially in a corresponding inner profile of a screw can engage to the required torque from the output tip to transfer to the screw.
  • the profile can be in be formed in any known manner, in particular as cross-slotted profile, polygonal profile, in particular Hexagonal profile, Torx profile etc.
  • the clamping engages the outer circumference the output tip in the area of the profile.
  • the elastic Clamping is thus in the region of the profile surfaces, with which the torque from the output tip on the Screw is transferred.
  • the clamping thus affects the effective for the torque transmission profile surface of Drive tip.
  • the invention is based on the object, a screwdriver with a provided at the output tip clamp so form that the clamping the torque transmission of the output tip to the screw is not affected.
  • the essential idea of the invention is to provide a resilient To arrange clamping element on the output tip.
  • the Clamping claimed by no circumferential surface of the profile the output tip, which is for engaging in the inner profile in the screw is needed and for the transfer of Torque from the output tip to the screw effective is.
  • the inner profile of the screw is in a blind hole of Formed screw, wherein the torque transmitting Profile surfaces, the axis-parallel wall surfaces of this blind hole form.
  • the reason of the blind hole is production-related more or less conical deepened.
  • This fact benefits the invention by preferably by the front of the profile arranged clamping element in this reason of the blind hole is pressed when the output tip is completely in the inner profile is plugged in.
  • the profile surfaces of the output tip and the inner profile of the screw are thus completely for the torque transmission available.
  • the clamping element is preferably a spring element, which on the End face of the output tip is attached.
  • This spring element surmounted with a resilient part at least in a peripheral region, the outer contour of the profile of the output tip. Is the output tip in the inner profile of the screw used, so this resilient part of the spring element pressed into the outer contour of the profile of the output tip, whereby the spring element with its elastic Restoring force on the inner wall of the screw is applied.
  • the Spring element can consist of an elastic plastic or is preferably a metallic molding.
  • the towering beyond the outer contour of the profile of the output tip resilient part of the spring element can thereby be designed as a spring tongue, with a free end is arranged spirally on the handling of the spring element.
  • the resilient part can be a circumferential direction be extending spring tongue, with its two ends is connected to the spring element. In these cases, the Spring tongue when inserting the output tip in the inner profile the screw is pressed substantially radially inward.
  • the spring tongue can substantially radially over the outer contour of the profile of the output tip protrude.
  • the screw is the spring tongue in the circumferential direction deformed to fit into the outer contour of the profile of the output tip to be pressed.
  • the clamping element by profile webs formed the profile edges over the face lengthen the profile. These protruding profile webs are deformed outwards relative to the outer contour of the profile. When inserting the output tip in the inner profile of Screw the profile webs into the outer contour of the profile bent into it, causing the elastic clamping force.
  • a first embodiment of the invention is shown.
  • the output tip 10 of a screwdriver 12 is with a profile 14 is formed, which in the illustrated embodiment a Torx profile is.
  • a Torx profile is formed, which in the illustrated embodiment a Torx profile is.
  • To a screw 16 off or turn the output spike 10 into an internal profile 18 of the screw 16 inserted axially.
  • the inner profile 18 corresponds the profile 14 of the output tip 10 in the illustrated Embodiment is thus the inner profile 18 also as Torx profile trained.
  • a clamping element is formed as a spring element 22.
  • the spring element 22 is as a molded part, for example. As a stamped part of a spring metal sheet made, which depending on the size of the output tip a Sheet thickness of example. 0.1 - 0.5 mm.
  • the spring element 22 has an approximately circular disk-shaped core 24, from which spirally extending in the circumferential direction spring tongues 26 stick out.
  • Fig. 1 are two Spring tongues 26 provided diametrically opposite each other.
  • the spring tongues 26 are integral with the core 24 at one end connected while the other end of the spring tongues 26 is free and thus can be deflected resiliently in the radial direction.
  • the spring element 22 is on the end face 20 of the output tip 10 attached.
  • the spring element 22 for example, with his Core 24 on an axially central pin 28 of the output tip 10 attached and by means of this pin 28 with the output tip 10 riveted.
  • the spring element could 22 also connected by a spot weld with the end face 20 be.
  • the spring element 22 is dimensioned such that its core 24 is completely concentric within the outer contour of the profile 14 is located.
  • the spring tongues 26 extend from the Core 24 starting spirally within the outer contour of the profile 14 and protrude only with their free ends on the outer contour of the profile 14 addition.
  • the spring element 22nd mounted on the end face 20 so that the free ends of the Spring tongues 26 in the region of the bottom of a profile of the Profils 14 are, as can be seen in Fig. 1.
  • the spring element 22 is then in the subsequent conical area of the bottom 30 of the blind hole, as in the enlarged view of FIG. 3 clearly you can see.
  • the outer profile surface of the profile 14 comes here over the entire axial profile depth of the inner profile 18th with this to form-fitting attachment, so over the entire axial tread depth of the inner profile 18, the torque of the Output tip 10 can be transferred to the screw 16.
  • the spring element 22 two spiral spring tongues 26, the free ends of each in diametral grooves of the profile 14 whose outer contour overtop. It is obvious that also one other number of spring tongues 26 may be provided. Essential is only that the free ends of the spring tongues with a Groove of the profile 14 coincide.
  • Fig. 5 shows another embodiment in which the spring element consists of a radially elastically deformable tire 32, by means of spokes 34 on the seated on the pin 28 Core 24 is attached.
  • the free arc lengths of the tire 32 form spring tongues, which are the outer contour of the profile 14 spread over the outside and under elastic deformation can be pressed radially inward when the output tip 10 is inserted into the screw 16.
  • Fig. 6 shows a fourth embodiment of the spring element 22.
  • the spring element radially from the on the pin 28 seated core 24 projecting spring tongues 36.
  • the spring tongues grip with their free ends on the outer contour of the profile 14.
  • the spring tongues 36 are diametrical arranged in pairs.
  • the free ends of each Pair of spring tongues 36 project in mirror symmetry to each other laterally from the axial centerline of the profile groove of the profile 14 beyond the contour of the groove flank addition.
  • the clamping element is formed by that at least one, preferably several or all Edges of the profile 14 of the output tip 10 in the form of elastic resilient profile webs 38 on the end face 20 of the Output tip 10 are extended out.
  • the profile webs 38 have such a cross section that they are elastically resilient are bendable.
  • the axial length around which the profile webs 38 protrude beyond the face 20, depends on the size the output tip 10 and is depending on this size about 0.2 to 0.8 mm.
  • profile webs 38 are with their free ends bent out of the outer contour of the profile 14. In the embodiment of FIG. 7, the free Ends of the profile webs 38 bent radially outward.
  • FIGS. 8 and 9 show a modification of that shown in FIG Execution. Again, the edges of the profile 14 extended beyond the end face 20, so that protruding resilient profile webs 38 are formed. In this version However, the free ends of the profile webs 38 are helical in the circumferential direction of the outer contour of the profile 14 bent.
  • the clamping elements effect in all versions a non-positive frictional connection between the output tip 10 and the screw 16.
  • the screw 16 is on the output tip 10 held.
  • the output spike 10th plugged against this frictional force in the inner profile 18 or be pulled out of this.
  • Torx profile is without It is further understood that the clamping according to the invention also can be used with other profiles.
  • z. B a hexagonal profile, overhang the spring tongues 26, 32 and 36, the respective polygon sides of the polygonal profile.
  • the spring tongues 26, 32 and 36 When overlapping with a Phillips profile the spring tongues 26, 32 and 36 the reason of between formed the legs of the cross-slot profile groove.
  • the profile webs 38 through the extension the corner edges of the polygonal profile or the legs of the Phillips profile formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Valve Device For Special Equipments (AREA)
  • Surgical Instruments (AREA)
  • Transplanting Machines (AREA)

Abstract

A screwdriver for screws with inner profile has a correspondingly shaped tip to locate into the profile. A spring grip is fitted to the tip to secure the tip into the recessed head of the screw. The spring grip can have various shapes and is either fitted to the tip or comprises an extension of the tip, to grip into the recessed head. A simple spring grip has a spiral shape while other variations include circular grips and sprung tags.

Description

Die Erfindung betrifft einen Schraubendreher gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a screwdriver according to the preamble of claim 1.

Unter Schraubendreher wird jedes Werkzeug zum Ein- und Ausdrehen von Schrauben verstanden, d. h. sowohl Handwerkzeuge als auch Schraubendrehereinsätze (Bits) für motorisch angetriebene Schraubwerkzeuge.Under screwdriver every tool for turning in and out understood by screws, d. H. both hand tools as well Also screwdriver bits (bits) for motor driven Fastening tools.

Weiter betrifft die Erfindung Schraubendreher, deren Abtriebspitze mit einem Profil ausgebildet ist, sodass die Abtriebspitze axial in ein entsprechendes Innenprofil einer Schraube eingreifen kann, um das erforderliche Drehmoment von der Abtriebspitze auf die Schraube zu übertragen. Das Profil kann in beliebiger an sich bekannter Weise ausgebildet sein, insbesondere als Kreuzschlitzprofil, Mehrkantprofil, insbesondere Sechskantprofil, Torx-Profil usw.Furthermore, the invention relates to screwdrivers whose output tip is formed with a profile, so that the output tip axially in a corresponding inner profile of a screw can engage to the required torque from the output tip to transfer to the screw. The profile can be in be formed in any known manner, in particular as cross-slotted profile, polygonal profile, in particular Hexagonal profile, Torx profile etc.

Um Schrauben insbesondere an schlecht zugänglichen Stellen eindrehen und ausdrehen zu können, ist es bekannt, die Schraube durch Klemmung an der Abtriebspitze des Schraubendrehers zu halten.To screws especially in hard to reach places screwing in and turning out, it is known the screw by clamping on the output tip of the screwdriver hold.

Bei diesen bekannten Lösungen greift die Klemmung am Außenumfang der Abtriebspitze im Bereich des Profils an. Die elastische Klemmung befindet sich somit im Bereich der Profilflächen, mit welchen das Drehmoment von der Abtriebspitze auf die Schraube übertragen wird. Die Klemmung beeinträchtigt somit die für die Drehmomentübertragung wirksame Profilfläche der Abtriebspitze. In these known solutions, the clamping engages the outer circumference the output tip in the area of the profile. The elastic Clamping is thus in the region of the profile surfaces, with which the torque from the output tip on the Screw is transferred. The clamping thus affects the effective for the torque transmission profile surface of Drive tip.

Der Erfindung liegt die Aufgabe zugrunde, einen Schraubendreher mit einer an der Abtriebspitze vorgesehenen Klemmung so auszubilden, dass die Klemmung die Drehmomentübertragung von der Abtriebspitze zu der Schraube nicht beeinflusst.The invention is based on the object, a screwdriver with a provided at the output tip clamp so form that the clamping the torque transmission of the output tip to the screw is not affected.

Diese Aufgabe wird erfindungsgemäß gelöst durch einen Schraubendreher mit den Merkmalen des Anspruchs 1.This object is achieved by a screwdriver with the features of claim 1.

Vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are in the subclaims specified.

Der wesentliche Gedanke der Erfindung besteht darin, ein federndes Klemmelement an der Abtriebspitze anzuordnen. Das Klemmelement beansprucht dadurch keine Umfangsfläche des Profils der Abtriebspitze, die für den Eingriff in das Innenprofil in der Schraube benötigt wird und für die Übertragung des Drehmoments von der Abtriebspitze auf die Schraube wirksam ist. Das Innenprofil der Schraube ist in einem Sackloch der Schraube ausgebildet, wobei die das Drehmoment übertragenden Profilflächen die achsparallelen Wandflächen dieses Sackloches bilden. Der Grund des Sackloches ist herstellungsbedingt mehr oder weniger konisch vertieft. Diese Tatsache nützt die Erfindung aus, indem das vorzugsweise vor der Stirnfläche des Profils angeordnete Klemmelement in diesen Grund des Sackloches gedrückt wird, wenn die Abtriebspitze vollständig in das Innenprofil eingesteckt ist. Die Profilflächen der Abtriebspitze und des Innenprofils der Schraube stehen damit vollständig für die Drehmomentübertragung zur Verfügung.The essential idea of the invention is to provide a resilient To arrange clamping element on the output tip. The Clamping claimed by no circumferential surface of the profile the output tip, which is for engaging in the inner profile in the screw is needed and for the transfer of Torque from the output tip to the screw effective is. The inner profile of the screw is in a blind hole of Formed screw, wherein the torque transmitting Profile surfaces, the axis-parallel wall surfaces of this blind hole form. The reason of the blind hole is production-related more or less conical deepened. This fact benefits the invention by preferably by the front of the profile arranged clamping element in this reason of the blind hole is pressed when the output tip is completely in the inner profile is plugged in. The profile surfaces of the output tip and the inner profile of the screw are thus completely for the torque transmission available.

Das Klemmelement ist vorzugsweise ein Federelement, das an der Stirnfläche der Abtriebspitze befestigt wird. Dieses Federelement überragt mit einem federnd nachgiebigen Teil zumindest in einem Umfangsbereich die Außenkontur des Profils der Abtriebspitze. Wird die Abtriebspitze in das Innenprofil der Schraube eingesetzt, so wird dieser federnd nachgiebige Teil des Federelements in die Außenkontur des Profils der Abtriebspitze hineingedrückt, wodurch das Federelement mit seiner elastischen Rückstellkraft an der Innenwandung der Schraube anliegt. Das Federelement kann dabei aus einem elastischen Kunststoff bestehen oder ist vorzugsweise ein metallisches Formteil.The clamping element is preferably a spring element, which on the End face of the output tip is attached. This spring element surmounted with a resilient part at least in a peripheral region, the outer contour of the profile of the output tip. Is the output tip in the inner profile of the screw used, so this resilient part of the spring element pressed into the outer contour of the profile of the output tip, whereby the spring element with its elastic Restoring force on the inner wall of the screw is applied. The Spring element can consist of an elastic plastic or is preferably a metallic molding.

Der über die Außenkontur des Profils der Abtriebspitze überragende federnd nachgiebige Teil des Federelements kann dabei als Federzunge ausgebildet sein, die mit einem freien Ende spiralförmig am Umgang des Federelementes angeordnet ist. Ebenso kann das federnd nachgiebige Teil eine in Umfangsrichtung verlaufende Federzunge sein, die mit ihren beiden Enden mit dem Federelement verbunden ist. In diesen Fällen wird die Federzunge beim Einsetzen der Abtriebspitze in das Innenprofil der Schraube im Wesentlichen radial nach innen gedrückt.The towering beyond the outer contour of the profile of the output tip resilient part of the spring element can thereby be designed as a spring tongue, with a free end is arranged spirally on the handling of the spring element. As well The resilient part can be a circumferential direction be extending spring tongue, with its two ends is connected to the spring element. In these cases, the Spring tongue when inserting the output tip in the inner profile the screw is pressed substantially radially inward.

In einer anderen Ausführung kann die Federzunge im Wesentlichen radial über die Außenkontur des Profils der Abtriebspitze hinausragen. Beim Einsetzen der Abtriebspitze in das Innenprofil der Schraube wird die Federzunge dabei in Umfangsrichtung verformt, um in die Außenkontur des Profils der Abtriebspitze gedrückt zu werden.In another embodiment, the spring tongue can substantially radially over the outer contour of the profile of the output tip protrude. When inserting the output tip into the inner profile the screw is the spring tongue in the circumferential direction deformed to fit into the outer contour of the profile of the output tip to be pressed.

In einer anderen Ausführung wird das Klemmelement durch Profilstege gebildet, die die Profilkanten über die Stirnfläche des Profils hinaus verlängern. Diese überstehenden Profilstege sind gegenüber der Außenkontur des Profils nach außen verformt. Beim Einsetzen der Abtriebspitze in das Innenprofil der Schraube werden die Profilstege in die Außenkontur des Profils hinein verbogen, wodurch sie die elastische Klemmkraft bewirken. In another embodiment, the clamping element by profile webs formed the profile edges over the face lengthen the profile. These protruding profile webs are deformed outwards relative to the outer contour of the profile. When inserting the output tip in the inner profile of Screw the profile webs into the outer contour of the profile bent into it, causing the elastic clamping force.

Im Folgenden wird die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen

Fig. 1
in einer vergrößerten perspektivischen Darstellung die Abtriebspitze eines Schraubendrehers mit einem Klemmelement in einer ersten Ausführung,
Fig. 2
einen Axialschnitt der in eine Schraube eingesetzten Abtriebspitze gemäß Fig. 1,
Fig. 3
eine vergrößerte Detaildarstellung aus Fig. 2,
Fig. 4
eine Fig. 1 entsprechende Darstellung mit einer zweiten Ausführung des Klemmelements,
Fig. 5
eine Fig. 1 entsprechende Darstellung mit einer dritten Ausführung des Klemmelements,
Fig. 6
eine Fig. 1 entsprechende Darstellung mit einer vierten Ausführung des Klemmelements,
Fig. 7
eine Fig. 1 entsprechende Darstellung mit einer fünften Ausführung des Klemmelements,
Fig. 8
eine Fig. 1 entsprechende Darstellung mit einer sechsten Ausführung des Klemmelements und
Fig. 9
eine Darstellung des Eingriffs der Abtriebspitze der Fig. 8 in eine Schraube.
In the following the invention will be explained in more detail with reference to embodiments shown in the drawing. Show it
Fig. 1
in an enlarged perspective view of the output tip of a screwdriver with a clamping element in a first embodiment,
Fig. 2
an axial section of the driven tip used in a screw according to FIG. 1,
Fig. 3
an enlarged detail of Fig. 2,
Fig. 4
1 corresponding representation with a second embodiment of the clamping element,
Fig. 5
1 corresponding representation with a third embodiment of the clamping element,
Fig. 6
1 corresponding representation with a fourth embodiment of the clamping element,
Fig. 7
1 corresponding representation with a fifth embodiment of the clamping element,
Fig. 8
a representation corresponding to FIG. 1 with a sixth embodiment of the clamping element and
Fig. 9
a representation of the engagement of the output tip of Fig. 8 in a screw.

In den Fig. 1-3 ist eine erste Ausführung der Erfindung dargestellt. Die Abtriebspitze 10 eines Schraubendrehers 12 ist mit einem Profil 14 ausgebildet, welches in dem dargestellten Ausführungsbeispiel ein Torx-Profil ist. Um eine Schraube 16 ausoder einzudrehen, wird die Abtriebspitze 10 in ein Innenprofil 18 der Schraube 16 axial eingesetzt. Das Innenprofil 18 entspricht dem Profil 14 der Abtriebspitze 10. Im dargestellten Ausführungsbeispiel ist somit das Innenprofil 18 ebenfalls als Torx-Profil ausgebildet.In Figs. 1-3 a first embodiment of the invention is shown. The output tip 10 of a screwdriver 12 is with a profile 14 is formed, which in the illustrated embodiment a Torx profile is. To a screw 16 off or turn the output spike 10 into an internal profile 18 of the screw 16 inserted axially. The inner profile 18 corresponds the profile 14 of the output tip 10 in the illustrated Embodiment is thus the inner profile 18 also as Torx profile trained.

An der axialen Endstirnfläche 20 der Abtriebspitze 10 ist vor dem Profil 14 ein Klemmelement angeordnet. Dieses Klemmelement ist als Federelement 22 ausgebildet. Das Federelement 22 ist als Formteil bspw. als Stanzteil aus einem Federmetall-Blech hergestellt, welches je nach Größe der Abtriebspitze eine Blechstärke von bspw. 0,1 - 0,5 mm aufweist. Das Federelement 22 weist einen in etwa kreisscheibenförmigen Kern 24 auf, von welchem spiralförmig in Umfangsrichtung verlaufende Federzungen 26 abstehen. Im Ausführungsbeispiel der Fig. 1 sind zwei Federzungen 26 diametral zueinander vorgesehen. Die Federzungen 26 sind mit ihrem einen Ende einstückig mit dem Kern 24 verbunden, während das andere Ende der Federzungen 26 frei ist und somit federnd in radialer Richtung ausgelenkt werden kann.At the axial end face 20 of the output tip 10 is present the profile 14 is arranged a clamping element. This clamping element is formed as a spring element 22. The spring element 22 is as a molded part, for example. As a stamped part of a spring metal sheet made, which depending on the size of the output tip a Sheet thickness of example. 0.1 - 0.5 mm. The spring element 22 has an approximately circular disk-shaped core 24, from which spirally extending in the circumferential direction spring tongues 26 stick out. In the embodiment of Fig. 1 are two Spring tongues 26 provided diametrically opposite each other. The spring tongues 26 are integral with the core 24 at one end connected while the other end of the spring tongues 26 is free and thus can be deflected resiliently in the radial direction.

Das Federelement 22 ist an der Stirnfläche 20 der Abtriebspitze 10 befestigt. Hierzu ist das Federelement 22 bspw. mit seinem Kern 24 auf einen axial mittigen Zapfen 28 der Abtriebspitze 10 aufgesetzt und mittels dieses Zapfens 28 mit der Abtriebspitze 10 vernietet. Alternativ könnte das Federelement 22 auch durch eine Punktschweißung mit der Stirnfläche 20 verbunden sein. Das Federelement 22 ist so dimensioniert, dass sein Kern 24 vollständig konzentrisch innerhalb der Außenkontur des Profils 14 liegt. Die Federzungen 26 verlaufen von dem Kern 24 ausgehend spiralig innerhalb der Außenkontur des Profils 14 und ragen nur mit ihren freien Enden über die Außenkontur des Profils 14 hinaus. Hierzu ist das Federelement 22 auf der Stirnfläche 20 so befestigt, dass die freien Enden der Federzungen 26 in dem Bereich des Grundes einer Profilnut des Profils 14 liegen, wie dies in Fig. 1 zu sehen ist.The spring element 22 is on the end face 20 of the output tip 10 attached. For this purpose, the spring element 22, for example, with his Core 24 on an axially central pin 28 of the output tip 10 attached and by means of this pin 28 with the output tip 10 riveted. Alternatively, the spring element could 22 also connected by a spot weld with the end face 20 be. The spring element 22 is dimensioned such that its core 24 is completely concentric within the outer contour of the profile 14 is located. The spring tongues 26 extend from the Core 24 starting spirally within the outer contour of the profile 14 and protrude only with their free ends on the outer contour of the profile 14 addition. For this purpose, the spring element 22nd mounted on the end face 20 so that the free ends of the Spring tongues 26 in the region of the bottom of a profile of the Profils 14 are, as can be seen in Fig. 1.

Aus den Fig. 2 und 3 ist die Wirkungsweise erkennbar. Wird die Abtriebspitze 10 mit ihrem Profil 14 in das Innenprofil 18 der Schraube 16 eingesetzt, so drückt das Innenprofil 18 die freien Enden der Federzungen 26 nach innen. Die Federzungen 26 liegen damit unter ihrer elastischen Rückstellkraft an dem Innenprofil 18 an und halten die Schraube 16 klemmend auf der Abtriebspitze 10. Das mit dem Innenprofil 18 ausgebildete Sackloch der Schraube 16 weist einen konischen Grund 30 auf, der sich herstellungsbedingt an den axialzylindrischen Abschnitt mit dem Innenprofil 18 anschließt. Wird zum Eindrehen der Schraube 16 die Abtriebspitze 10 in das Sackloch der Schraube 16 eingeführt, dringt das Profil 14 der Abtriebspitze 10 in das Sackloch der Schraube ein, bis die Stirnfläche 20 der Abtriebspitze 10 das innere Ende des Innenprofils 18 erreicht. Das Federelement 22 befindet sich dann in dem sich anschließenden konischen Bereich des Grundes 30 des Sackloches, wie dies in der vergrößerten Darstellung der Fig. 3 deutlich zu sehen ist. Die äußere Profilfläche des Profils 14 kommt dabei über die gesamte axiale Profiltiefe des Innenprofils 18 mit diesem zur formschlüssigen Anlage, sodass über die gesamte axiale Profiltiefe des Innenprofils 18 das Drehmoment von der Abtriebspitze 10 auf die Schraube 16 übertragen werden kann.From Figs. 2 and 3, the effect can be seen. Will the Output tip 10 with its profile 14 in the inner profile 18 of Screw 16 used, so presses the inner profile 18, the free Ends of the spring tongues 26 inside. The spring tongues 26 are thus under their elastic restoring force on the inner profile 18 and hold the screw 16 clamped on the Output tip 10. The trained with the inner profile 18 Blind hole of the screw 16 has a conical bottom 30, the production due to the axial cylindrical section with the inner profile 18 connects. Will be for screwing the screw 16, the output tip 10 in the blind hole of Screw 16 introduced penetrates the profile 14 of the output tip 10 in the blind hole of the screw until the end face 20th the output tip 10 reaches the inner end of the inner profile 18. The spring element 22 is then in the subsequent conical area of the bottom 30 of the blind hole, as in the enlarged view of FIG. 3 clearly you can see. The outer profile surface of the profile 14 comes here over the entire axial profile depth of the inner profile 18th with this to form-fitting attachment, so over the entire axial tread depth of the inner profile 18, the torque of the Output tip 10 can be transferred to the screw 16.

In dem Ausführungsbeispiel der Fig. 1 weist das Federelement 22 zwei spiralige Federzungen 26 auf, deren freie Enden jeweils in diametralen Nuten des Profils 14 dessen Außenkontur überragen. Es ist ohne Weiteres ersichtlich, dass auch eine andere Anzahl von Federzungen 26 vorgesehen sein kann. Wesentlich ist nur, dass die freien Enden der Federzungen mit einer Nut des Profils 14 zusammenfallen.In the embodiment of Fig. 1, the spring element 22 two spiral spring tongues 26, the free ends of each in diametral grooves of the profile 14 whose outer contour overtop. It is obvious that also one other number of spring tongues 26 may be provided. Essential is only that the free ends of the spring tongues with a Groove of the profile 14 coincide.

In Fig. 4 ist entsprechend eine abgewandelte Ausführung dargestellt, bei welcher drei jeweils um 120° gegeneinander versetzte spiralige Federzungen 26 vorgesehen sind.4, a modified embodiment is shown accordingly, in which three offset each other by 120 ° spiral spring tongues 26 are provided.

Fig. 5 zeigt eine weitere Ausführung, bei welcher das Federelement aus einem radial elastisch verformbaren Reifen 32 besteht, der mittels Speichen 34 an dem auf dem Zapfen 28 sitzenden Kern 24 befestigt ist. Die freien Bogenlängen des Reifen 32 bilden dabei Federzungen, die die Außenkontur des Profils 14 nach außen übergreifen und unter elastischer Verformung radial nach innen gedrückt werden können, wenn die Abtriebspitze 10 in die Schraube 16 eingesetzt wird.Fig. 5 shows another embodiment in which the spring element consists of a radially elastically deformable tire 32, by means of spokes 34 on the seated on the pin 28 Core 24 is attached. The free arc lengths of the tire 32 form spring tongues, which are the outer contour of the profile 14 spread over the outside and under elastic deformation can be pressed radially inward when the output tip 10 is inserted into the screw 16.

Fig. 6 zeigt eine vierte Ausführung des Federelements 22. In dieser Ausführung weist das Federelement radial von dem auf dem Zapfen 28 sitzenden Kern 24 abstehende Federzungen 36 auf. Die Federzungen greifen mit ihren freien Enden über die Außenkontur des Profils 14.Fig. 6 shows a fourth embodiment of the spring element 22. In this embodiment, the spring element radially from the on the pin 28 seated core 24 projecting spring tongues 36. The spring tongues grip with their free ends on the outer contour of the profile 14.

Wie aus Fig. 6 ersichtlich ist, sind die Federzungen 36 diametral zueinander paarweise angeordnet. Die freien Enden jedes Paares der Federzungen 36 ragen dabei spiegelsymmetrisch zueinander seitlich von der axialen Mittellinie der Profilnut des Profils 14 über die Kontur der Nutflanke hinaus. Wird die Abtriebspitze 10 in das Innenprofil 18 eingesetzt, so drückt dieses Innenprofil die beiden freien Enden des Paares der Federzungen 36 in Umfangsrichtung auseinander, sodass diese in der Kontur der jeweils benachbarten Profilstege des Profils 14 eintauchen. As is apparent from Fig. 6, the spring tongues 36 are diametrical arranged in pairs. The free ends of each Pair of spring tongues 36 project in mirror symmetry to each other laterally from the axial centerline of the profile groove of the profile 14 beyond the contour of the groove flank addition. Will the Output tip 10 inserted into the inner profile 18, so presses this inner profile the two free ends of the pair of spring tongues 36 apart in the circumferential direction, so that in the contour of the respectively adjacent profile webs of the profile 14th plunge.

In Fig. 7 ist eine fünfte Ausführung der Erfindung dargestellt. In dieser Ausführung wird das Klemmelement dadurch gebildet, dass wenigstens eine, vorzugsweise mehrere oder alle Kanten des Profils 14 der Abtriebspitze 10 in Form von elastisch federnden Profilstegen 38 über die Stirnfläche 20 der Abtriebspitze 10 hinaus verlängert sind. Die Profilstege 38 weisen einen solchen Querschnitt auf, dass sie elastisch federnd biegbar sind. Die axiale Länge, um welche die Profilstege 38 über die Stirnfläche 20 hinausragen, hängt von der Größe der Abtriebspitze 10 ab und beträgt je nach dieser Größe ca. 0,2 bis 0,8 mm.In Fig. 7, a fifth embodiment of the invention is shown. In this embodiment, the clamping element is formed by that at least one, preferably several or all Edges of the profile 14 of the output tip 10 in the form of elastic resilient profile webs 38 on the end face 20 of the Output tip 10 are extended out. The profile webs 38 have such a cross section that they are elastically resilient are bendable. The axial length around which the profile webs 38 protrude beyond the face 20, depends on the size the output tip 10 and is depending on this size about 0.2 to 0.8 mm.

Die über die Stirnfläche 20 hinausragenden Profilstege 38 sind mit ihren freien Enden aus der Außenkontur des Profils 14 ausgebogen. In dem Ausführungsbeispiel der Fig. 7 sind die freien Enden der Profilstege 38 radial nach außen gebogen.The projecting beyond the end face 20 profile webs 38 are with their free ends bent out of the outer contour of the profile 14. In the embodiment of FIG. 7, the free Ends of the profile webs 38 bent radially outward.

Wird die Abtriebspitze 10 in das Innenprofil 18 der Schraube 16 eingesetzt, so werden die freien Enden der Profilstege 38 gegen deren elastische Federkraft nach innen in die Kontur des Profils 14 gedrückt, sodass sie axial mit den Kanten des Profils 14 fluchten. Dabei legen sich die freien Enden der Profilstege 38 unter ihrer Federkraft an dem Innenprofil 18 an, sodass die Schraube 16 auf der Abtriebspitze 10 geklemmt gehalten wird, und gelangen bei vollständig eingesetzter Abtriebspitze 10 in den konischen Grund 30.If the output tip 10 in the inner profile 18 of the screw 16 used, the free ends of the profile webs 38th against the elastic spring force inwards into the contour of the Pressed profile 14 so that it is axially aligned with the edges of the profile 14 are aligned. Here are the free ends of the profile webs 38 under its spring force on the inner profile 18, so that the screw 16 is clamped on the output tip 10 is held, and arrive at fully inserted output tip 10 in the conical bottom 30.

Die Fig. 8 und 9 zeigen eine Abwandlung der in Fig. 7 dargestellten Ausführung. Auch hier sind die Kanten des Profils 14 über die Stirnfläche 20 hinaus verlängert, sodass überstehende federnde Profilstege 38 gebildet werden. In dieser Ausführung sind die freien Enden der Profilstege 38 jedoch schraubenlinienförmig in Umfangsrichtung aus der Außenkontur des Profils 14 gebogen.FIGS. 8 and 9 show a modification of that shown in FIG Execution. Again, the edges of the profile 14 extended beyond the end face 20, so that protruding resilient profile webs 38 are formed. In this version However, the free ends of the profile webs 38 are helical in the circumferential direction of the outer contour of the profile 14 bent.

Wird die Abtriebspitze 10 in das Innenprofil 18 der Schraube 16 eingesetzt, wie dies in Fig. 9 dargestellt ist, so werden die freien Enden der Profilstege 38 gegen ihre Federkraft in die Kontur des Profils 14 gebogen, sodass sie wiederum mit den Längskanten des Profils 14 fluchten. Die Profilstege 38 erzeugen dabei mit ihrer federnden Rückstellkraft ein auf die Abtriebspitze 10 wirkendes Drehmoment, wodurch das Profil 14 der Abtriebspitze 10 in dem Innenprofil 18 der Schraube 16 geklemmt wird.If the output tip 10 in the inner profile 18 of the screw 16 are used, as shown in Fig. 9 are so the free ends of the profile webs 38 against their spring force in bent the contour of the profile 14, so they in turn with the Longitudinal edges of the profile 14 are aligned. Create the profile webs 38 with its resilient restoring force on the output tip 10 acting torque, whereby the profile 14 of the Output tip 10 is clamped in the inner profile 18 of the screw 16 becomes.

Wie die vorstehenden Ausführungen zeigen, bewirken die Klemmelemente in allen Ausführungen einen kraftschlüssigen Reibschluss zwischen der Abtriebspitze 10 und der Schraube 16. Durch diesen Reibschluss wird die Schraube 16 auf der Abtriebspitze 10 gehalten. Durch eine axiale Kraft zwischen der Abtriebspitze 10 und der Schraube 16 kann die Abtriebspitze 10 gegen diese Reibkraft in das Innenprofil 18 eingesteckt oder aus diesem herausgezogen werden.As the above statements show, the clamping elements effect in all versions a non-positive frictional connection between the output tip 10 and the screw 16. By this frictional engagement, the screw 16 is on the output tip 10 held. By an axial force between the output tip 10 and the screw 16, the output spike 10th plugged against this frictional force in the inner profile 18 or be pulled out of this.

Auch wenn in den dargestellten Ausführungsbeispielen die Erfindung anhand eines Torx-Profils dargestellt ist, ist ohne Weiteres verständlich, dass die erfindungsgemäße Klemmung auch bei anderen Profilen eingesetzt werden kann.Although in the illustrated embodiments, the invention represented by a Torx profile is without It is further understood that the clamping according to the invention also can be used with other profiles.

Bei einem Mehrkantprofil, z. B. einem Sechskantprofil, überragen die Federzungen 26, 32 bzw. 36 die jeweiligen Polygonseiten des Mehrkantprofils. Bei einem Kreuzschlitzprofil übergreifen die Federzungen 26, 32 bzw. 36 den Grund der zwischen den Schenkeln des Kreuzschlitzprofils gebildeten Nut. In der anderen Ausführung werden die Profilstege 38 durch die Verlängerung der Eckkanten des Mehrkantprofils bzw. der Schenkel des Kreuzschlitzprofils gebildet. In a polygonal profile, z. B. a hexagonal profile, overhang the spring tongues 26, 32 and 36, the respective polygon sides of the polygonal profile. When overlapping with a Phillips profile the spring tongues 26, 32 and 36 the reason of between formed the legs of the cross-slot profile groove. In the another embodiment, the profile webs 38 through the extension the corner edges of the polygonal profile or the legs of the Phillips profile formed.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Abtriebspitzedrive tip
1212
Schraubendreherscrewdriver
1414
Profilprofile
1616
Schraubescrew
1818
Innenprofilinternal profile
2020
Stirnflächeface
2222
Federelementspring element
2424
Kerncore
2626
Federzungenspring tongues
2828
Zapfenspigot
3030
Grundreason
3232
Reifentires
3434
Speichenspoke
3636
Federzungenspring tongues
3838
ProfilstegeTie bars

Claims (14)

Schraubendreher mit einer mit einem Profil (14) ausgebildeten Abtriebspitze (10) für den axialen Eingriff in ein entsprechendes Innenprofil (18) einer Schraube (16) und mit einer an der Abtriebspitze (10) angeordneten Klemmung, mit welcher sich die Abtriebspitze (10) beim Eingriff elastisch federnd an der Wandung des Innenprofils (18) anlegt,
dadurch gekennzeichnet, dass ein elastisch federndes Klemmelement (22, 38) an der Abtriebspitze (10) angeordnet ist.
Screwdriver having a driven tip (10) with a profile (14) for axial engagement in a corresponding inner profile (18) of a screw (16) and with a clamping arranged on the output tip (10), with which the output tip (10) during the engagement elastically resiliently against the wall of the inner profile (18) applies,
characterized in that an elastically resilient clamping element (22, 38) is arranged on the output tip (10).
Schraubendreher nach Anspruch 1,
dadurch gekennzeichnet, dass das Klemmelement (22, 38) vor der Stirnfläche (20) des Profils (14) angeordnet ist.
Screwdriver according to claim 1,
characterized in that the clamping element (22, 38) in front of the end face (20) of the profile (14) is arranged.
Schraubendreher nach Anspruch 2,
dadurch gekennzeichnet, dass das Klemmelement ein an der Stirnfläche (20) der Abtriebspitze (10) befestigtes Federelement (22) ist.
Screwdriver according to claim 2,
characterized in that the clamping element is a on the end face (20) of the output tip (10) fixed spring element (22).
Schraubendreher nach Anspruch 3,
dadurch gekennzeichnet, dass das Federelement (22) in wenigstens einem Umfangsbereich des Profils (14) mit einem federnd nachgiebigen Teil (26, 32, 36) über die Außenkontur des Profils (14) überragt.
Screwdriver according to claim 3,
characterized in that the spring element (22) in at least one peripheral region of the profile (14) with a resilient part (26, 32, 36) projects beyond the outer contour of the profile (14).
Schraubendreher nach Anspruch 4,
dadurch gekennzeichnet, dass der federnd nachgiebige Teil wenigstens eine in Umfangsrichtung verlaufende und radial nach innen biegsame Federzunge (26, 32) ist.
Screwdriver according to claim 4,
characterized in that the resilient part is at least one circumferentially extending and radially inwardly flexible spring tongue (26, 32).
Schraubendreher nach Anspruch 5,
dadurch gekennzeichnet, dass die wenigstens eine Federzunge mit einem Ende mit dem Federelement (22) verbunden ist, im Wesentlichen spiralförmig verläuft und mit ihrem freien Ende über die Außenkontur überragt.
Screwdriver according to claim 5,
characterized in that the at least one spring tongue is connected at one end to the spring element (22), extends substantially helically and protrudes beyond the outer contour with its free end.
Schraubendreher nach Anspruch 5,
dadurch gekennzeichnet, dass die wenigstens eine Federzunge (32) in Umfangsrichtung verläuft, mit beiden Enden mit dem Federelement (22) verbunden ist und in ihrem mittleren Bereich radial nach innen biegbar ist.
Screwdriver according to claim 5,
characterized in that the at least one spring tongue (32) extends in the circumferential direction, with both ends connected to the spring element (22) and is bendable in its central region radially inwardly.
Schraubendreher nach Anspruch 4,
dadurch gekennzeichnet, dass der federnd nachgiebige Teil wenigstens eine radiale Federzunge (36) ist, deren freies Ende über die Außenkontur überragt und in Umfangsrichtung verbiegbar ist.
Screwdriver according to claim 4,
characterized in that the resilient part is at least one radial spring tongue (36) whose free end projects beyond the outer contour and is bendable in the circumferential direction.
Schraubendreher nach Anspruch 8,
dadurch gekennzeichnet, dass die radialen Federzungen (36) paarweise angeordnet sind und ihre freien Enden in Umfangsrichtung auseinander spreizbar sind.
Screwdriver according to claim 8,
characterized in that the radial spring tongues (36) are arranged in pairs and their free ends are spread apart in the circumferential direction.
Schraubendreher nach einem der Ansprüche 3-9,
dadurch gekennzeichnet, dass das Federelement (22) ein Formteil aus einem Federmetallblech ist.
Screwdriver according to one of claims 3-9,
characterized in that the spring element (22) is a molded part made of a spring metal sheet.
Schraubendreher nach einem der Ansprüche 3-9,
dadurch gekennzeichnet, dass das Federelement (22) ein Kunststoffteil ist.
Screwdriver according to one of claims 3-9,
characterized in that the spring element (22) is a plastic part.
Schraubendreher nach Anspruch 2,
dadurch gekennzeichnet, dass das Klemmelement wenigstens einen elastisch federnden Profilsteg (38) aufweist, der über die Stirnfläche (20) des Profils (14) der Abtriebspitze (10) hinausragt und eine Profilkante des Profils (14) axial verlängert, und dass das freie Ende des Profilsteges (38) gegen die Außenkontur des Profils (14) nach außen verformt ist.
Screwdriver according to claim 2,
characterized in that the clamping element has at least one elastically resilient profile web (38) which projects beyond the end face (20) of the profile (14) of the output tip (10) and axially extends a profile edge of the profile (14), and that the free end of the profile web (38) against the outer contour of the profile (14) is deformed outwards.
Schraubendreher nach Anspruch 12,
dadurch gekennzeichnet, dass das freie Ende des wenigstens einen Profilsteges (38) gegen die Außenkontur des Profils (14) radial nach außen gebogen ist.
Screwdriver according to claim 12,
characterized in that the free end of the at least one profile web (38) against the outer contour of the profile (14) is bent radially outward.
Schraubendreher nach Anspruch 12 oder 13,
dadurch gekennzeichnet, dass das freie Ende des wenigstens einen Profilsteges (38) in Umfangsrichtung über die Außenkontur des Profils (14) ausgebogen ist.
Screwdriver according to claim 12 or 13,
characterized in that the free end of the at least one profile web (38) in the circumferential direction over the outer contour of the profile (14) is bent.
EP03028907A 2003-09-05 2003-12-17 Screwdriver Expired - Lifetime EP1512494B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20313791U DE20313791U1 (en) 2003-09-05 2003-09-05 screwdriver
DE20313791U 2003-09-05

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EP1512494B1 EP1512494B1 (en) 2008-06-18

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AT (1) ATE398506T1 (en)
DE (2) DE20313791U1 (en)
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Publication number Priority date Publication date Assignee Title
US10987783B2 (en) 2014-01-16 2021-04-27 Milwaukee Electric Tool Corporation Screwdriver

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD769689S1 (en) 2015-01-15 2016-10-25 Milwaukee Electric Tool Corporation Fastener driver
DE102019009234B4 (en) 2019-10-11 2024-05-23 PSZ electronic GmbH Fastener system

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Publication number Priority date Publication date Assignee Title
US4060113A (en) * 1974-07-03 1977-11-29 Ryuzo Matsushima Tightening device for threaded screw part
EP0458449A1 (en) * 1990-05-22 1991-11-27 Textron Inc. Driver with fastener retention means
CA2243315A1 (en) * 1998-07-16 2000-01-16 Willi Hahn Gmbh & Co. Kg Screwdriver
WO2003006210A1 (en) * 2001-07-12 2003-01-23 Synthes Ag Chur Screwdriver with a screw holder
US20030164075A1 (en) * 2002-03-01 2003-09-04 Blackston Michael D. Tool with fastener engaging member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060113A (en) * 1974-07-03 1977-11-29 Ryuzo Matsushima Tightening device for threaded screw part
EP0458449A1 (en) * 1990-05-22 1991-11-27 Textron Inc. Driver with fastener retention means
CA2243315A1 (en) * 1998-07-16 2000-01-16 Willi Hahn Gmbh & Co. Kg Screwdriver
WO2003006210A1 (en) * 2001-07-12 2003-01-23 Synthes Ag Chur Screwdriver with a screw holder
US20030164075A1 (en) * 2002-03-01 2003-09-04 Blackston Michael D. Tool with fastener engaging member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10987783B2 (en) 2014-01-16 2021-04-27 Milwaukee Electric Tool Corporation Screwdriver
US11945079B2 (en) 2014-01-16 2024-04-02 Milwaukee Electric Tool Corporation Screwdriver

Also Published As

Publication number Publication date
DE50310007D1 (en) 2008-07-31
WO2005032767A1 (en) 2005-04-14
DE20313791U1 (en) 2003-11-06
EP1512494B1 (en) 2008-06-18
ATE398506T1 (en) 2008-07-15

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