EP0890420A1 - Shaft lock and on/off switch arrangement for a rotary power tool - Google Patents

Shaft lock and on/off switch arrangement for a rotary power tool Download PDF

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Publication number
EP0890420A1
EP0890420A1 EP98304909A EP98304909A EP0890420A1 EP 0890420 A1 EP0890420 A1 EP 0890420A1 EP 98304909 A EP98304909 A EP 98304909A EP 98304909 A EP98304909 A EP 98304909A EP 0890420 A1 EP0890420 A1 EP 0890420A1
Authority
EP
European Patent Office
Prior art keywords
switch
shaft
rotary tool
output shaft
tool
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Withdrawn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
EP98304909A
Other languages
German (de)
French (fr)
Inventor
Hau Chuen Elvis Kwam
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0890420A1 publication Critical patent/EP0890420A1/en
Withdrawn legal-status Critical Current

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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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • 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 present invention relates to a rotary tool, in particular a rotary tool which is designed to drive a rotary working tool such as a rotating disc, screwdriver head, or engraving disc.
  • the invention relates in particular to a rotary tool which is designed to drive a variety of interchangeable rotary working tools.
  • the present invention further relates to an on/off switch for a power tool.
  • the tool comprises a housing in which an electric motor is provided which motor drives a tool output shaft either directly or through intermediate elements.
  • the output shaft terminates at its free end remote from the motor in a mount for releasably retaining one of a plurality of rotary working tools.
  • Known retaining elements include a collet structure (disclosed in US Patent No. 2,218,168) in which the output shaft is hollow and receives a collet in the forward end. Both the output shaft and the collet extend externally of the housing of the tool. A variety of working tools, each of which is provided with a shank, may be mounted on the output shaft by means of the collet.
  • US Patent No. 3,873,863 discloses a shaft lock which is activated by a push button which extends through an opening in the housing.
  • the present invention provides a rotary tool of the type which comprises an electric motor, which motor is connected to an output shaft for mounting a variety of interchangeable working tools, and is provided with an on/off switch for controlling the supply of electrical energy to the motor, and a shaft lock for securing the output shaft against rotation, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
  • the present invention further provides an on/off switch for a rotary tool of the type which comprises an output shaft for mounting a variety of interchangeable working tools and is provided with a shaft lock to secure the shaft against rotation during removal and subsequent fitting of a working tool, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
  • a rotary tool shown generally at 10, comprises a housing 2, in which is located an electric motor 4.
  • a tool output shaft 6 is driven by the motor 4 through intermediate elements, including a fan 8.
  • the output shaft 6 is hollow, and receives a collet 12 in the end 20 remote from the motor 4.
  • the collet 12 has a cylindrical base and a tapered head and is split such that the head includes several forward end portions 18 which are generally biased slightly radially outwardly.
  • the forward end 20 of the output shaft 6 is screw-threaded, and receives an internally screw-threaded collet nut 22 which is also hollow, and which is disposed about the collet head 16. Forward of the screw-threading, the collet nut 22 has a smooth tapered interior surface.
  • a variety of working tools may be used with the rotary tool 10 for example, a rotating disc, screwdriver head, engraving disc, etc.
  • Each working tool includes a shank.
  • the collet nut 22 In order to mount a working tool on the rotary tool 10 the collet nut 22 is loosened by unscrewing. As the nut 22 moves forwardly, the split forward end portions 18 of the collet head move away from each other due to their bias. The shank of the working tool is inserted through the open end of the nut 22 and between the forward ends 18 of the collet head. The nut 22 is tightened, forcing the forward ends 18 of the collet 12 together to hold the working tool shank securely within the output shaft 6. Rotation of the output shaft 6 causes rotation of the collet 12, and thus the working tool, due to the frictional contact between each element.
  • the squeezing of the collet forward end portions 18 against the working tool shank by the nut 22 serves to retain the collet 12 and working tool within the output shaft 6, as well as to increase the frictional grip of the collet 12 on the working tool shaft.
  • the rotary tool 10 includes a push button 24 which extends through an opening 26 in the housing 10.
  • the button 24 includes an integrally formed downwardly extending pin 28.
  • a coil spring 30 is disposed about the pin 28 and extends between the internal surface 32 of the button 24 and an inner ledge 34 formed in the housing 2 so as to bias the push button 24 radially outwardly away from the tool output shaft 6.
  • the rotary tool includes a push button 24 which extends through an opening in the housing.
  • the button 24 further includes a downwardly extending shaft 34 having a cylindrical main section 36 having a lower protrusion 38 of reduced diameter.
  • the output shaft 6 includes two openings 40 formed therein.
  • the coil spring 30 biases the push button 24 away from the output shaft openings 40 so that the protrusion 38 does not interfere with normal operation.
  • the button 24 is pushed at its external surface 42, the shaft 34 is forced radially inwardly against the spring bias until the protrusion 38 contacts the outer surface of the shaft 6.
  • the output shaft 6 may be rotated by grasping and rotating the collet nut 22, until the protrusion 38 is aligned with one of the openings 40 in the shaft 6.
  • the inward pressure on the button 24 causes the protrusion 38 to enter the opening 40, thereby securing the output shaft 6 against rotation. Further rotation of the nut 22 while the output shaft 6 is held stationary allows the nut 22 to be loosened and removed.
  • the on/off function is controlled by an internal on/off push-button switch 44 disposed near the rear of the housing 2.
  • a sliding switch 46 is disposed within and extends longitudinally along the housing 2 and includes a radially inward rear flange 48 which is disposed adjacent the internal button 44.
  • the sliding switch 44 includes a cover portion 50 which is disposed through a housing slot 52 adjacent and behind the shaft lock push button 24.
  • the cover portion 50 is hollow and includes a forward opening 54 which surrounds the rear portion of the push button 24.
  • the rear flange 48 With the slide switch 46 in the rear position, the rear flange 48 is out of contact with the internal on/off push button switch 44 and the cover portion 50 is disposed rearwardly of the external shaft lock push button 24. Accordingly, the tool is switched off, and the user has access to the shaft lock push button 24. Thus, the shaft lock can be actuated to change the tool and/or collet.
  • the slide switch cover portion 50 When the slide switch cover portion 50 is slided forwardly, the rear flange 48 contacts the internal on/off push button 44 to switch the tool on. Furthermore, the cover portion 50 is slided completely over the shaft lock push button 24 so as to prevent the shaft lock button 24 from being pushed. Accordingly, inadvertent actuation of the shaft lock when the tool is switched on is prevented.
  • the fan 8 is disposed between the tool output shaft 6 and motor output shaft 56.
  • the fan 8 is secured upon the motor output shaft 56, and the tool output shaft 6 is really a driven shaft disposed within an opening in the fan 8.
  • the fan 8 is non-conductive to isolate the motor 4 electrically from the metallic tool output shaft 6 and thus the working tool.

Abstract

A rotary tool (10) of the type which comprises an electric motor (4), which is connected to an output shaft (6) for mounting a variety of interchangeable working tools, is provided with an on/off switch 44 for controlling the supply of electrical energy to the motor (4), and a shaft lock (38) for securing an output shaft (6) against rotation. The on/off switch 44 is provided with means (46,50) for preventing activation of the shaft lock (38) while the on/off switch (44) is in the on position.

Description

The present invention relates to a rotary tool, in particular a rotary tool which is designed to drive a rotary working tool such as a rotating disc, screwdriver head, or engraving disc. The invention relates in particular to a rotary tool which is designed to drive a variety of interchangeable rotary working tools.
The present invention further relates to an on/off switch for a power tool.
In a rotary tool which is designed to drive a variety of interchangeable rotary working tools, the tool comprises a housing in which an electric motor is provided which motor drives a tool output shaft either directly or through intermediate elements. The output shaft terminates at its free end remote from the motor in a mount for releasably retaining one of a plurality of rotary working tools.
Known retaining elements include a collet structure (disclosed in US Patent No. 2,218,168) in which the output shaft is hollow and receives a collet in the forward end. Both the output shaft and the collet extend externally of the housing of the tool. A variety of working tools, each of which is provided with a shank, may be mounted on the output shaft by means of the collet.
In order to remove the working tool from the output shaft, the shaft must be secured against rotation. US Patent No. 3,873,863 discloses a shaft lock which is activated by a push button which extends through an opening in the housing.
Known rotary tools further comprise an on/off switch for controlling the supply of electrical energy to the motor. The tool may be cordless, comprising a battery, or may be provided with a cord for connection to a source of supply of electricity.
Known rotary tools of this type have the disadvantage that the on/off switch for the supply of energy to the motor is independent of the shaft lock. This could lead to the motor being switched on while the shaft lock was engaged which could cause damage to the tool.
It is an object of the present invention to provide a rotary tool in which the above disadvantages are reduced or substantially obviated.
It is a further object of the invention to provide an improved on/off switch for a rotary tool of the type described above.
The present invention provides a rotary tool of the type which comprises an electric motor, which motor is connected to an output shaft for mounting a variety of interchangeable working tools, and is provided with an on/off switch for controlling the supply of electrical energy to the motor, and a shaft lock for securing the output shaft against rotation, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
The present invention further provides an on/off switch for a rotary tool of the type which comprises an output shaft for mounting a variety of interchangeable working tools and is provided with a shaft lock to secure the shaft against rotation during removal and subsequent fitting of a working tool, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
A preferred embodiment of a rotary tool will now be described with reference to the accompanying drawings in which:
  • Figure 1 is a perspective view of a rotary tool;
  • Figure 2 is a view of a rotary tool, with the housing partially broken away, showing the on/off switch in the off position;
  • Figure 3 is a similar view to Figure 2, showing the on/off switch in the on position; and
  • Figure 4 is a partial view, to a larger scale, of the output shaft and shaft lock of a rotary tool.
    • A rotary tool, shown generally at 10, comprises a housing 2, in which is located an electric motor 4. A tool output shaft 6 is driven by the motor 4 through intermediate elements, including a fan 8.
    The output shaft 6 is hollow, and receives a collet 12 in the end 20 remote from the motor 4.
    The output shaft 6 and collet 12 extend externally of the housing 2.
    The collet 12 has a cylindrical base and a tapered head and is split such that the head includes several forward end portions 18 which are generally biased slightly radially outwardly. The forward end 20 of the output shaft 6 is screw-threaded, and receives an internally screw-threaded collet nut 22 which is also hollow, and which is disposed about the collet head 16. Forward of the screw-threading, the collet nut 22 has a smooth tapered interior surface.
    A variety of working tools may be used with the rotary tool 10 for example, a rotating disc, screwdriver head, engraving disc, etc. Each working tool includes a shank.
    In order to mount a working tool on the rotary tool 10 the collet nut 22 is loosened by unscrewing. As the nut 22 moves forwardly, the split forward end portions 18 of the collet head move away from each other due to their bias. The shank of the working tool is inserted through the open end of the nut 22 and between the forward ends 18 of the collet head. The nut 22 is tightened, forcing the forward ends 18 of the collet 12 together to hold the working tool shank securely within the output shaft 6. Rotation of the output shaft 6 causes rotation of the collet 12, and thus the working tool, due to the frictional contact between each element. In addition, the squeezing of the collet forward end portions 18 against the working tool shank by the nut 22 serves to retain the collet 12 and working tool within the output shaft 6, as well as to increase the frictional grip of the collet 12 on the working tool shaft.
    The rotary tool 10 includes a push button 24 which extends through an opening 26 in the housing 10. The button 24 includes an integrally formed downwardly extending pin 28.
    A coil spring 30 is disposed about the pin 28 and extends between the internal surface 32 of the button 24 and an inner ledge 34 formed in the housing 2 so as to bias the push button 24 radially outwardly away from the tool output shaft 6.
    The rotary tool includes a push button 24 which extends through an opening in the housing. The button 24 further includes a downwardly extending shaft 34 having a cylindrical main section 36 having a lower protrusion 38 of reduced diameter.
    The output shaft 6 includes two openings 40 formed therein. The coil spring 30 biases the push button 24 away from the output shaft openings 40 so that the protrusion 38 does not interfere with normal operation. However, when the button 24 is pushed at its external surface 42, the shaft 34 is forced radially inwardly against the spring bias until the protrusion 38 contacts the outer surface of the shaft 6. With the button 24 held down, the output shaft 6 may be rotated by grasping and rotating the collet nut 22, until the protrusion 38 is aligned with one of the openings 40 in the shaft 6. The inward pressure on the button 24 causes the protrusion 38 to enter the opening 40, thereby securing the output shaft 6 against rotation. Further rotation of the nut 22 while the output shaft 6 is held stationary allows the nut 22 to be loosened and removed.
    As can be seen in Figures 2 and 3, the on/off function is controlled by an internal on/off push-button switch 44 disposed near the rear of the housing 2. A sliding switch 46 is disposed within and extends longitudinally along the housing 2 and includes a radially inward rear flange 48 which is disposed adjacent the internal button 44. At the forward end, the sliding switch 44 includes a cover portion 50 which is disposed through a housing slot 52 adjacent and behind the shaft lock push button 24. The cover portion 50 is hollow and includes a forward opening 54 which surrounds the rear portion of the push button 24.
    With the slide switch 46 in the rear position, the rear flange 48 is out of contact with the internal on/off push button switch 44 and the cover portion 50 is disposed rearwardly of the external shaft lock push button 24. Accordingly, the tool is switched off, and the user has access to the shaft lock push button 24. Thus, the shaft lock can be actuated to change the tool and/or collet. When the slide switch cover portion 50 is slided forwardly, the rear flange 48 contacts the internal on/off push button 44 to switch the tool on. Furthermore, the cover portion 50 is slided completely over the shaft lock push button 24 so as to prevent the shaft lock button 24 from being pushed. Accordingly, inadvertent actuation of the shaft lock when the tool is switched on is prevented.
    With further reference to Figures 2 and 3, the fan 8 is disposed between the tool output shaft 6 and motor output shaft 56. The fan 8 is secured upon the motor output shaft 56, and the tool output shaft 6 is really a driven shaft disposed within an opening in the fan 8. In addition, the fan 8 is non-conductive to isolate the motor 4 electrically from the metallic tool output shaft 6 and thus the working tool.

    Claims (8)

    1. A rotary tool (10) of the type which comprises an electric motor (4), which motor (4) is connected to an output shaft (6) for mounting a variety of interchangeable working tools, and is provided with an on/off switch 44 for controlling the supply of electrical energy to the motor (4), and a shaft lock (38) for securing an output shaft (6) against rotation, characterised in that the on/off switch 44 is provided with means (46,50) for preventing activation of the shaft lock (38) while the on/off switch (44) is in the on position.
    2. A rotary tool according to claim 1 characterised in that the on/off switch (44) is located internally of a housing (2) for the tool (10).
    3. A rotary tool according to claim 1 or claim 2 characterised in that the tool output shaft (6) is provided with a collet assembly (12) for securing a working tool.
    4. A rotary tool according to any of claims 1 to 3 characterised in that the shaft lock (38) comprises a protrusion (38) for engagement in an opening (40) provided in the shaft (6).
    5. A rotary tool according to any of claims 1 to 4 characterised in that the shaft lock (38) is activated by a push button (24) which projects through an opening (26) in the housing (2) and is biased radially outward by means of a coil spring (30).
    6. A rotary tool according to any of claims 1 to 5 characterised in that the means for preventing activation of the shaft lock (38) while the on/off switch (44) is in the on position comprises a slide switch (46) which terminates at one end in a cover portion (30) and at the other end in a flange (48).
    7. A rotary tool substantially as herein described with reference to the accompanying drawings.
    8. An on/off switch (44) for a rotary tool (10) of the type which comprises an output shaft for mounting a variety of interchangeable working tools and is provided with a shaft lock 38 to secure (9) the shaft (6) against rotation during removal and subsequent fitting of a working tool, characterised in that the on/off switch (44) is provided with means (46,50) for preventing activation of the shaft lock (38) while the on/off switch (44) is in the on position.
    EP98304909A 1997-07-08 1998-06-23 Shaft lock and on/off switch arrangement for a rotary power tool Withdrawn EP0890420A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    GB9714258A GB2327054A (en) 1997-07-08 1997-07-08 Shaft locking
    GB9714258 1997-07-08

    Publications (1)

    Publication Number Publication Date
    EP0890420A1 true EP0890420A1 (en) 1999-01-13

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    ID=10815456

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98304909A Withdrawn EP0890420A1 (en) 1997-07-08 1998-06-23 Shaft lock and on/off switch arrangement for a rotary power tool

    Country Status (3)

    Country Link
    EP (1) EP0890420A1 (en)
    CN (1) CN1071176C (en)
    GB (1) GB2327054A (en)

    Cited By (9)

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    Publication number Priority date Publication date Assignee Title
    DE19908300C1 (en) * 1999-02-26 2000-11-09 Fein C & E Strap holder for a hand tool
    EP1166973A1 (en) * 2000-06-23 2002-01-02 Black & Decker Inc. Gear and lever spindle lock
    WO2004026535A1 (en) * 2002-09-13 2004-04-01 Robert Bosch Gmbh Hand machine tool, in particular an angle grinder
    WO2005070626A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Rotating shaft locking mechanism
    NL1033187C2 (en) * 2007-01-08 2008-07-09 Bosch Gmbh Robert Electric tools, such as an angle grinder.
    EP2018250A1 (en) * 2006-05-09 2009-01-28 Atlas Copco Tools Ab Portable power tool with drive shaft lock means
    CN104084869A (en) * 2014-06-13 2014-10-08 常州旗德电器有限公司 Polishing head and split type polisher comprising same
    JP2019098465A (en) * 2017-12-01 2019-06-24 株式会社マキタ Power tool
    US11858106B2 (en) 2019-08-08 2024-01-02 Black & Decker Inc. Power tools and power tools platform

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    DE19803454B4 (en) * 1998-01-30 2018-11-29 Scintilla Ag Hand-operated percussion drill with a locking device
    DE10029898A1 (en) 2000-06-17 2001-12-20 Bosch Gmbh Robert Hand tool; has tool chuck rotated by driven motor and driven shaft and having clamp device and has stop device arranged on driven shaft to secure or release clamp device against casing part
    NL1025144C2 (en) * 2003-12-30 2005-07-04 Bosch Gmbh Robert Power tool with double-control switch.
    US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
    US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
    US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
    US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
    US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
    US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
    US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
    DE102010029267A1 (en) * 2010-05-25 2011-12-01 Robert Bosch Gmbh Power tool, in particular drill driver
    EP2621680A4 (en) * 2010-09-27 2018-03-28 Bosch Power Tools (China) Co., Ltd. Power tool with interlock system
    GB2535981A (en) * 2015-02-13 2016-09-07 3D 2 0 Ltd Finishing system for 3D prints
    EP3106266A1 (en) * 2015-06-17 2016-12-21 HILTI Aktiengesellschaft Control method for an electric machine tool
    CN106393007B (en) * 2015-07-31 2019-06-14 南京德朔实业有限公司 Torque exports tool and its accessories apparatus

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    US3872951A (en) * 1973-11-06 1975-03-25 Black & Decker Mfg Co Spindle locking mechanism for rotary power device
    DE2926469A1 (en) * 1979-06-30 1981-01-22 Licentia Gmbh Arresting device for drive spindle in power tool - has magnetic coil releasing bolt that locks gearing
    DE3001907A1 (en) * 1980-01-19 1981-07-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Spindle locking mechanism for hand held grinder - has peg blocking gearwheel on spindle, operated by sliding power supply switch
    US4754669A (en) * 1985-10-24 1988-07-05 Black & Decker Inc. Motor driven screwdriver with spindle lock
    US5191968A (en) * 1991-09-23 1993-03-09 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
    EP0612588A1 (en) * 1993-02-26 1994-08-31 Kress-elektrik GmbH + Co. Elektromotorenfabrik Control device for electric tools
    US5601483A (en) * 1993-10-27 1997-02-11 C. & E. Fein Gmbh & Co. Power tool
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    Cited By (14)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19908300C1 (en) * 1999-02-26 2000-11-09 Fein C & E Strap holder for a hand tool
    EP1166973A1 (en) * 2000-06-23 2002-01-02 Black & Decker Inc. Gear and lever spindle lock
    US8096857B2 (en) 2002-09-13 2012-01-17 Robert Bosch Gmbh Power tool, in particular angle grinder
    WO2004026535A1 (en) * 2002-09-13 2004-04-01 Robert Bosch Gmbh Hand machine tool, in particular an angle grinder
    WO2005070626A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Rotating shaft locking mechanism
    US7980325B2 (en) 2004-01-16 2011-07-19 Credo Technology Corporation Rotating shaft locking mechanism
    EP2018250A1 (en) * 2006-05-09 2009-01-28 Atlas Copco Tools Ab Portable power tool with drive shaft lock means
    EP2018250A4 (en) * 2006-05-09 2010-10-20 Atlas Copco Tools Ab Portable power tool with drive shaft lock means
    WO2008085029A1 (en) * 2007-01-08 2008-07-17 Robert Bosch Gmbh Electrical machine tool, such as an angle grinder, with spindle blocking device
    NL1033187C2 (en) * 2007-01-08 2008-07-09 Bosch Gmbh Robert Electric tools, such as an angle grinder.
    CN104084869A (en) * 2014-06-13 2014-10-08 常州旗德电器有限公司 Polishing head and split type polisher comprising same
    JP2019098465A (en) * 2017-12-01 2019-06-24 株式会社マキタ Power tool
    US11858106B2 (en) 2019-08-08 2024-01-02 Black & Decker Inc. Power tools and power tools platform
    US11951604B2 (en) 2019-08-08 2024-04-09 Black & Decker Inc. Power tools and power tools platform

    Also Published As

    Publication number Publication date
    CN1071176C (en) 2001-09-19
    GB9714258D0 (en) 1997-09-10
    CN1204567A (en) 1999-01-13
    GB2327054A (en) 1999-01-13

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