EP1941973B2 - Visseuse - Google Patents

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Publication number
EP1941973B2
EP1941973B2 EP07021436.6A EP07021436A EP1941973B2 EP 1941973 B2 EP1941973 B2 EP 1941973B2 EP 07021436 A EP07021436 A EP 07021436A EP 1941973 B2 EP1941973 B2 EP 1941973B2
Authority
EP
European Patent Office
Prior art keywords
output shaft
screwing
implement according
switching device
gear
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.)
Active
Application number
EP07021436.6A
Other languages
German (de)
English (en)
Other versions
EP1941973A2 (fr
EP1941973B1 (fr
EP1941973A3 (fr
Inventor
Bernd Fleischmann
Thomas Dürr
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.)
Festool GmbH
Original Assignee
Festool 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
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Application filed by Festool GmbH filed Critical Festool GmbH
Publication of EP1941973A2 publication Critical patent/EP1941973A2/fr
Publication of EP1941973A3 publication Critical patent/EP1941973A3/fr
Application granted granted Critical
Publication of EP1941973B1 publication Critical patent/EP1941973B1/fr
Publication of EP1941973B2 publication Critical patent/EP1941973B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0064—Means for adjusting screwing depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the invention relates to a screwdriver for screwing screws into workpieces according to the preamble of claim 1.
  • screwdrivers are out US 2004/0040727 A1 or FR 1 142 933 A1 known.
  • a lining for receiving a screwing tool is provided in these screwdrivers.
  • US 6, 655, 473 B1 is a screwdriver with a bevel gear or bevel gear known, which serves to drive a planetary gear.
  • the screwdriver has a tool holder.
  • Such screwdrivers with a depth stop are mainly used for Serienverschrauben when a plurality of screws to be screwed in succession in a workpiece. They are commonly referred to as drywall screwdrivers.
  • the drive motor remains in operation by turning on the screwdriver by the user until it is turned off by the user.
  • the user regularly turns off the screwdriver only after screwing in the last screw. This ongoing running of the engine not only promotes wear, but causes a correspondingly long-lasting noise and brings a correspondingly large energy consumption with it.
  • the present invention is therefore an object of the invention to provide a screwdriver, which is easy to handle, is little susceptible to wear and causes as little noise. In addition, the energy consumption is to be lowered.
  • the drive motor is energized only when the screwing starts, so overcome by the pressure on the output shaft, the spring force and therefore the motion-tight connected to the output shaft operating part pushed backwards and thus the switching device is automatically transferred to its on state.
  • the actuating part moves away from the switching device, so that the drive motor is switched off automatically. In this way, the drive motor runs only during the respective screwing, so no unnecessary engine run times occur.
  • the switching device is expediently a non-contact switching device, expediently a Hall sensor, which is associated with a permanent magnet on the actuating part.
  • the output shaft is driven by a gear transmission from the side, wherein the gear transmission includes a driven wheel seated on the output shaft and the output shaft, the driven gear in the axial direction between its front, inactive position and its rear, active position movable be upheld. In this way, the rear end of the output shaft is exposed so that they or the associated actuating part can actuate the switching device.
  • the output shaft and the output gear abut each other via an inclined surface arrangement, so that the movement of the output shaft in the axial direction is superimposed a rotational movement of the output shaft relative to the output gear and the operation of the driven gear on the output shaft in addition to the output shaft driving torque in an axial direction forward axial force is applied.
  • the resulting from the drawing screwdriver 1 is used for screwing screws into workpieces. It is designed as a hand-held device and has a base section 2, which forms a pistol-like handle 3, on the front side of which a user to be actuated by pressing the actuator 4 of an electrical main switch is arranged. Above the handle 3, an upper portion 5 of the base portion 2 extends forward to a device head 6, which in the Figures 3 and 4 is shown separately. At the bottom of the device head 6, an electric drive motor 7 (only in FIG. 5 schematically indicated) containing motor region 8 of the base section 2 at.
  • the screwdriver 1 is a cordless device.
  • the battery pack supplying power to the drive motor 7 is accommodated in a battery housing 9 detachably fastened to the base section 2 at the bottom.
  • the power supply could be done by connecting the device by means of an electrical supply cable to the mains power instead of batteries.
  • the switching on and off of the drive motor 7 is controlled by the screwing, that is, the drive motor 7 is automatically set at the beginning of the screwing in motion and turned off automatically after screwing the respective screw. This is achieved in the manner described below.
  • the device head 6 includes a drivable by the drive motor 7 forth output shaft 10 to which a tool carrier 11 is connected, which extends coaxially to the output shaft 10 to the front side 12 of the screwdriver 1 out and there has a frontal tool holder for a rotary tool 13, which is interchangeable formed in the tool holder screwdriver bit is formed.
  • the rotary tool 13 has a polygonal shaft 14 which is inserted into the correspondingly multi-edged tool holder of the tool carrier 11.
  • the tool carrier 11 extends in the axial extension of the output shaft 10 and is detachably connected to the output shaft 10 so that it can be replaced if necessary. In the connected state, the tool carrier 11 is seated firmly on the output shaft 10 both in the axial direction and in the circumferential direction.
  • the output shaft 10 is rotatable both at two axially spaced rotary and sliding bearings 15, 16 and in the axial direction between a front, inactive position ( FIG. 3 ) and a rear, active position ( FIG. 4 ) movably mounted.
  • the axial movement is limited by fixedly arranged end stops, which are formed in the illustrated embodiment of the rotary and sliding bearings 16 and of a next to the other rotary and sliding bearings 15 arranged bearing ring 19.
  • Each end stop 17, 18 is associated with a radial shoulder on the output shaft 10. It is understood that the end stops can be formed in other ways than shown.
  • the output shaft 10 is urged by a spring force in the direction of its front position.
  • This spring force can be applied by a coil spring 20 fixed at one end in the device head 6 and at the other end to the output shaft 10.
  • the output shaft 10 is driven via a gear transmission from the side.
  • the gear transmission includes a seated on the output shaft 10 output gear 21, wherein the output shaft 10, the output gear 21 passes through and thereby between its front, inactive position and its rear, active position is movable.
  • the output gear 21 is arranged axially fixed. It is arranged between the front rotating and sliding bearing 16 and the bearing ring 19.
  • the gear transmission is a bevel gear.
  • the drive by means of a drive shaft 22 with Pinion 23, which is transverse to the output shaft 10 and driven by the drive motor 7 ago.
  • the drive shaft 22 carries a first bevel gear 24 which meshes with the output gear 21 forming the second bevel gear of the gear transmission.
  • the output shaft 10 and the output gear 21 abut one another via an inclined surface arrangement 27, so that when the output shaft 10 is moved in the axial direction of this axial movement, a rotational movement of the output shaft 10 is superimposed relative to the output gear 21.
  • the inclined surface arrangement 27 is in the illustrated embodiment of several - in principle would suffice - distributed over the circumference, spirally inclined to the axial direction extending inclined surfaces 25 on the inner circumference of the driven gear 21 and of the inclined surfaces 25 of the driven gear 21 associated, corresponding spirally inclined inclined surfaces 26th formed on the outer circumference of the output shaft 10.
  • inclined surface arrangement 27 can also be realized differently.
  • the screwdriver 1 further has on its front side 12 a depth stop 28 which limits the screwing depth when screwing in a screw and abuts the workpiece when reaching the desired screwing depth.
  • the depth stop 28 is formed by a stop sleeve 29 which surrounds the rotary tool 13 and which comes with its end face for abutment against the workpiece.
  • the depth stop 28 is adjustable in the usual way in the axial direction. For this purpose, it can be seated in the usual way on an adjusting sleeve 30, which can be screwed back and forth in the axial direction (threaded connection 31) on a fixed housing part 32 of the device head 6.
  • the depth stop could also be designed differently than illustrated and be formed, for example, by a screw magazine containing a plurality of screws, which are successively conveyed to the turning tool 13.
  • screw magazines are known, so that a more detailed description is unnecessary.
  • the output shaft 10 is, as described, movable in the axial direction between its front, inactive position and its rear, active position. This movement is used to turn on and off the drive motor 7.
  • the screwdriver 1 has a switching device 33 for switching on and off the energization of the drive motor 7, wherein the switching device 33 by a movement of the output shaft 10 mitinesde actuating section 34 is switchable.
  • the switching device 33 is in the front position of the output shaft 10 in its the energizing of the drive motor 7 preventing the off state and in the rear position of the output shaft 10 in its the energizing of the drive motor 7 permitting ON state.
  • the switching device 33 of the output shaft 10 is upstream in the axial direction to the rear. She is fixed.
  • the actuating part 34 is arranged on the rear end face 35 of the freely ending output shaft 10 or, depending on the type of switching device 33, formed by the end face 35 itself.
  • the switching device 33 expediently operates without contact. It can therefore be a proximity sensor in the form of a Hall sensor. Other possibilities would be, for example, a reed sensor, an optical sensor or a magnetostrictive sensor. Depending on the type of sensor, the associated actuating part 34 is formed by a permanent magnet 36.
  • the switching device 33 could in principle also be formed by a contact switch.
  • the working method is as follows:
  • FIG. 3 shows the starting position.
  • the output shaft 10 is located by the force of the coil spring 20 in its front, inactive position, in which the actuating portion 34 is arranged at a distance from the switching device 33, so that an energization of the drive motor is prevented.
  • This off state of the drive shaft 10 is applied to the screwdriver tool 13 to be screwed on and sets the screw on the workpiece or you bring the screwdriver tool 13 into engagement with the screw head of the previously positioned on the workpiece screw.
  • the screw not shown, extends in the illustration according to the Figures 3 and 4 in the axial direction of the output shaft 10.
  • the workpiece, also not shown, is found in the Figures 3 and 4 right in front of the device in the axial direction of the output shaft 10 rectangular position.
  • the depth stop 28 comes to rest against the workpiece.
  • the pressure exerted on the output shaft 10 by the workpiece via the screw is reduced, so that the output shaft 10 is relieved from the workpiece.
  • the force exerted by the coil spring 20 and especially by the drive wheel 21 to the output shaft 10 forward axial force then moves the output shaft 10 with simultaneous rotation of the output shaft 10 (inclined surface 27) forward, so that the actuating part 34 away from the switching device 33.
  • the screw is screwed a short distance into the workpiece, so that the screw head is sunk. If the actuating part 34 has reached the response distance to the switching device 33, the switching device 33 reaches its switch-off state, so that the drive motor 7 is no longer energized. It then comes out again FIG. 3 resulting situation.
  • the wiring of the switching device 33 and the required for switching on and off the energization of the drive motor 7 circuit is conventional and can be performed by a person skilled in the art without further notice.
  • the screwdriver 1 may conveniently be operated either in one of two modes:
  • the first operating mode is the single mode (standard operation). In this mode, the operator operates on the actuator 4, the main switch so that the screwdriver is turned on so far. The screwdriver is, so to speak, in a ready state. The energization of the drive motor 7 then depends on the axial position of the output shaft 10, that is, whether you press the screwdriver against the screw and the workpiece or screwing is completed.
  • This readiness state of the screwdriver lasts as long as the user actuates the main switch.
  • a preselection switch 37 in the case shown a rotary switch, available. In the pre-selection position "single operation", the operator must operate the actuator 4 of the main switch. If the preselection switch 37 is adjusted to the "continuous operation” position, the continuous electrical standby state is obtained via an associated control device 38.
  • the block diagram according to FIG. 5 shows the electrical or electronic control device 38, via which the compared to the control device 38 undersized drive motor 7 can be energized by the voltage source 39 forth.
  • Both the actuated by the actuator 4 main switch 40 and the symbolically drawn switching device 33 are connected to the control device 38 as well as the selector switch 37.
  • the main switch 40 In the operating mode "continuous operation", the main switch 40 is bridged, as it were, so that the state of the switching device 33 is decisive for the energization of the drive motor 7.
  • a further switch for changing the direction of rotation of the output shaft 10 may also be provided.
  • the tool carrier 11 is fixedly connected to the output shaft 10 both in the axial direction and in the direction of rotation. This is a detachable connection, so that the tool holder 11 can be replaced if necessary.
  • the output shaft 10 has a plug-in recess 42 projecting from its front end face 41 with a polygonal cross-section over at least part of its length.
  • the tool carrier 11 forms a plug-in shaft 43 with a corresponding polygonal cross-section, so that the inserted into the plug-in recess 42 insertion shaft 43 is rotatably connected to the output shaft 10.
  • a circumferential locking groove 44 is further formed, which are associated with one or more distributed over the circumference locking body in the form of locking balls 45.
  • the locking balls 45 are arranged in the plug-in recess 42 containing region of the output shaft 10 and each mounted in a radial direction from the outer periphery of the output shaft 10 to the plug recess 42 through radial recess 46 movable in the radial direction.
  • the detent balls 45 is associated with a displaceable on the outer circumference of the output shaft 10 in the axial direction locking sleeve 47, which holds the locking balls 45 inwardly into the locking groove 44 in its illustrated locking position.
  • the already described coil spring 20 is supported on the locking sleeve 47 and acts on the locking sleeve 47 and the locking balls 45, the output shaft 10 forward.
  • the locking sleeve 47 has a forward and radially outwardly rising contact surface 48, via which the locking sleeve 47 abuts the locking balls 45, so that they are pressed inward and the tool carrier 11 is locked to the output shaft 10.
  • the trailing edge of the detent groove 44 then pushes the detent balls 45 outward, the locking sleeve 47 moves over the inclined contact surface 48 against the spring force to the rear, so that the tool carrier is released.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (11)

  1. Visseuse pour le vissage de vis dans des pièces, avec un arbre de sortie (10) pouvant être entraîné depuis un moteur d'entraînement électrique (7), avec un logement d'outil coaxial à l'arbre de sortie (10), tourné vers le côté avant de la visseuse (12), pour un outil rotatif (13), lequel logement est disposé sur l'arbre de sortie ou sur un porte-outil (11) relié de manière solidaire en rotation à l'arbre de sortie (10), en particulier de manière amovible, sachant que l'arbre de sortie (10) est logé de manière mobile dans le sens axial entre une position avant inactive et une position arrière active et peut être sollicité par une force de ressort vers sa position avant, et avec une butée de profondeur (28) pour la délimitation de la profondeur de vissage, sachant que la visseuse (1) présente un dispositif de commutation (33) pour l'activation et la désactivation de l'alimentation électrique du moteur d'entraînement (7) qui peut être commuté par une partie d'actionnement (34) participant au déplacement de l'arbre de sortie (10), sachant que le dispositif de commutation (33) se trouve dans la position avant de l'arbre de sortie (10) dans son état désactivé empêchant l'alimentation électrique du moteur d'entraînement (7) et dans la position arrière de l'arbre de sortie (10) dans son état d'activation autorisant l'alimentation électrique du moteur d'entraînement (7), sachant qu'elle présente sur son côté avant (12) une butée de profondeur (28) réglable dans le sens axial qui délimite la profondeur de vissage lors du vissage d'une vis et bute contre la pièce lors de l'atteinte de la profondeur de vissage souhaitée, caractérisée en ce qu'en cas de suppression d'un embrayage, l'arbre de sortie (10) reste constamment mécaniquement relié au mécanisme d'entraînement.
  2. Visseuse selon la revendication 1, caractérisée en ce que le dispositif de commutation (33) est monté en amont de l'arbre de sortie (10) dans le sens axial vers l'arrière.
  3. Visseuse selon la revendication 1 ou 2, caractérisée en ce que le dispositif de commutation (33) est un dispositif de commutation travaillant sans contact.
  4. Visseuse selon la revendication 3, caractérisée en ce que le dispositif de commutation (33) présente un capteur à effet Hall.
  5. Visseuse selon l'une quelconque des revendications 2 à 4, caractérisée en ce que la partie d'actionnement (34) est disposée sur le côté frontal (35) côté arrière de l'arbre de sortie (10).
  6. Visseuse selon l'une quelconque des revendications 3 à 5, caractérisée en ce que la partie d'actionnement (34) présente un aimant permanent (36).
  7. Visseuse selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'arbre de sortie (10) est entraîné par un engrenage (21, 24) depuis le côté, sachant que l'engrenage contient une roue de sortie (21) logeant sur l'arbre de sortie (10) et l'arbre de sortie (10) traverse la roue de sortie (21) de manière mobile dans le sens axial entre sa position avant inactive et sa position arrière active.
  8. Visseuse selon la revendication 7, caractérisée en ce que l'arbre de sortie (10) et la roue de sortie (21) reposent l'un sur l'autre par le biais d'un ensemble de surfaces obliques (27) de sorte qu'un mouvement de rotation de l'arbre de sortie (10) par rapport à la roue de sortie (21) est superposé au mouvement de l'arbre de sortie (10) dans le sens axial et de sorte qu'une force axiale dirigée dans le sens axial vers l'avant est exercée en fonctionnement de la roue de sortie (21) sur l'arbre de sortie (10), outre le couple entraînant l'arbre de sortie (10).
  9. Visseuse selon la revendication 7 ou 8, caractérisée en ce que l'arbre de sortie (10) est entraîné à l'aide d'un arbre d'entraînement (22) s'étendant transversalement à celui-ci par un engrenage à pignons coniques.
  10. Visseuse selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la force de ressort est appliquée par un ressort hélicoïdal (20) en appui d'une part fixement et d'autre part contre l'arbre de sortie (10) ou une partie (47) logée sur l'arbre de sortie (10).
  11. Visseuse selon la revendication 10, caractérisée en ce que l'arbre de sortie (10) présente un évidement à emboîtement (42) partant de son côté frontal avant (41) avec au moins une section transversale polygonale au-delà d'une longueur partielle et le porte-outils (11) présente une tige à emboîter (43) emboîtée de manière amovible dans l'évidement à emboîtement (42) avec au moins une section transversale polygonale au-delà d'une longueur partielle, en ce qu'une rainure d'encliquetage (44) périphérique est réalisée sur la tige à emboîter (43), en ce que dans la zone contenant l'évidement à emboîtement (42) de l'arbre de sortie (10), un ou plusieurs corps d'encliquetage (45) associés à la rainure d'encliquetage (44), répartis sur la périphérie sont logés de manière mobile dans le sens radial respectivement dans un évidement radial (46) passant dans le sens radial de la périphérie extérieure de l'arbre de sortie (10) à l'évidement à emboîtement (42) et en ce qu'une douille de verrouillage (47) mobile dans le sens axial sur la périphérie extérieure de l'arbre de sortie (10) est associée à au moins un corps d'encliquetage (45), douille contre laquelle s'appuie le ressort hélicoïdal (20) de sorte que la douille de verrouillage (47) soit sollicitée par la force de ressort vers l'avant, sachant que la douille de verrouillage (47) présente une surface d'appui (48) montant vers l'avant et radialement vers l'extérieur, agissant contre au moins un corps d'encliquetage (45), surface d'appui (48) par laquelle la douille de verrouillage (47) maintient au moins un corps d'encliquetage (45) radialement vers l'intérieur dans une position de verrouillage venant en prise dans la rainure d'encliquetage (44) et par laquelle une force de détachement déplaçant la douille de verrouillage (47) dans le sens inverse de la force de ressort vers l'arrière est appliquée sur la douille de verrouillage (47) si une force de traction dirigée vers l'avant est exercée sur le porte-outils (11) de sorte que le flanc arrière de la rainure d'encliquetage (44) presse au moins un corps d'encliquetage (45) vers l'extérieur contre la surface d'appui (48).
EP07021436.6A 2007-01-03 2007-11-03 Visseuse Active EP1941973B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001061.5A DE102007001061B4 (de) 2007-01-03 2007-01-03 Schraubgerät

Publications (4)

Publication Number Publication Date
EP1941973A2 EP1941973A2 (fr) 2008-07-09
EP1941973A3 EP1941973A3 (fr) 2009-08-05
EP1941973B1 EP1941973B1 (fr) 2011-11-30
EP1941973B2 true EP1941973B2 (fr) 2016-01-20

Family

ID=39226769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07021436.6A Active EP1941973B2 (fr) 2007-01-03 2007-11-03 Visseuse

Country Status (2)

Country Link
EP (1) EP1941973B2 (fr)
DE (1) DE102007001061B4 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875804B2 (en) 2010-01-07 2014-11-04 Black & Decker Inc. Screwdriving tool having a driving tool with a removable contact trip assembly
DE102010009917A1 (de) * 2010-03-02 2011-09-08 Protool Gmbh Schraubvorsatz und damit ausgestattetes Schraubgerät
DE102010053314A1 (de) 2010-11-26 2012-05-31 C. & E. Fein Gmbh Schrauber mit sensorgesteuerter Abschaltung
DE102011078384A1 (de) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Trockenbauschrauber
DE102013100986A1 (de) 2013-01-31 2014-07-31 C. & E. Fein Gmbh Schrauber mit elektronischer Tiefenabschaltung
CN114473410B (zh) * 2022-01-17 2023-05-16 上海姿琳汽车配件有限公司 一种方形壳体四角螺栓锁定装配装置及其使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156221A (en) † 1990-06-22 1992-10-20 Ceka Elektrowerkzeuge Ag & Co. Kg Method of and arrangement for controlling the operation of a hand-held electrical device
US5360073A (en) † 1992-03-12 1994-11-01 Ryobi Limited Battery type screw driver
US5398946A (en) † 1993-12-29 1995-03-21 Poly-Tech Industries Chuck having one-step lock and release

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142933A (fr) * 1955-02-09 1957-09-24 Brevets Wagner Soc D Machine-outil électrique portative
US7090030B2 (en) * 2002-09-03 2006-08-15 Microtorq L.L.C. Tranducerized torque wrench
US6655473B1 (en) * 2002-12-31 2003-12-02 Ying Fang Chi Hand tool with an adjustable rotational speed and torsion force
DE202006006273U1 (de) * 2006-04-19 2006-06-14 Festool Gmbh Schraubgerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156221A (en) † 1990-06-22 1992-10-20 Ceka Elektrowerkzeuge Ag & Co. Kg Method of and arrangement for controlling the operation of a hand-held electrical device
US5360073A (en) † 1992-03-12 1994-11-01 Ryobi Limited Battery type screw driver
US5398946A (en) † 1993-12-29 1995-03-21 Poly-Tech Industries Chuck having one-step lock and release

Also Published As

Publication number Publication date
EP1941973A2 (fr) 2008-07-09
DE102007001061B4 (de) 2017-07-27
DE102007001061A1 (de) 2008-07-10
EP1941973B1 (fr) 2011-11-30
EP1941973A3 (fr) 2009-08-05

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