WO2012110453A1 - Dispositif de transfert de couple sous forme de mandrin pour mèches - Google Patents

Dispositif de transfert de couple sous forme de mandrin pour mèches Download PDF

Info

Publication number
WO2012110453A1
WO2012110453A1 PCT/EP2012/052406 EP2012052406W WO2012110453A1 WO 2012110453 A1 WO2012110453 A1 WO 2012110453A1 EP 2012052406 W EP2012052406 W EP 2012052406W WO 2012110453 A1 WO2012110453 A1 WO 2012110453A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer sleeve
transmission device
torque transmission
stop
sleeve
Prior art date
Application number
PCT/EP2012/052406
Other languages
German (de)
English (en)
Inventor
Oliver Pistor
Original Assignee
Wera - Werk Hermann Werner Gmbh & Co. Kg
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 Wera - Werk Hermann Werner Gmbh & Co. Kg filed Critical Wera - Werk Hermann Werner Gmbh & Co. Kg
Publication of WO2012110453A1 publication Critical patent/WO2012110453A1/fr

Links

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
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means
    • 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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • 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
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • 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
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/1405—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers for impact wrenches or screwdrivers

Definitions

  • Torque transmission device in the form of a bit lining
  • the invention relates to a torque transmission device, in particular in the form of a quick change chuck for a screwdriver bit, with a insertable into a chuck of a rotary drive device drive shaft inserted in an inner sleeve having an insertion opening for receiving a screwdriver bit, which is formed so that the profiled working tip of the protruding into the insertion opening screwdriver bit beyond the edge of the insertion, and with an outer sleeve, the stop limited to the inner sleeve between a first stop position in which a first drive shaft side stop of the outer sleeve rests against a first counter-stop of the inner sleeve and a fixed to the outer sleeve Ring magnet is located at a distance from the edge of the insertion, and a second stop position, in which the ring magnet rests on the edge of the insertion, back and forth is displaceable.
  • the EP 1 260 319 Bl describes a generic torque transmitting device in the form of a quick change chuck for synchronenburnerbits, wherein in a inner sleeve, a hex shank is clamped, which protrudes from the inner sleeve section forms a clamping portion with which the shaft can be inserted into a chuck of a drive unit.
  • the inner sleeve is made of a non-ferromagnetic material and surrounded by a likewise made of a non-ferromagnetic material outer sleeve which carries on its side facing away from the drive portion side a ring magnet which can be brought by moving the outer sleeve against the surrounding a fferwerkmaschinegneeintrittsö réelle end face of a screw head, so as to fix the screw in alignment with the axis of rotation of the chuck.
  • DE 20 2009 015 665 U1 likewise describes a generic bit lining in which an inner sleeve has an insertion opening for a screwdriver bit and an opposite opening in which there is a drive shaft.
  • an outer sleeve On this inner sleeve, an outer sleeve is slidably mounted, the front edge carries a magnet.
  • a spring-loaded ball or a spring-loaded friction piece which is frictionally supported on the inner side of the outer sleeve, is inserted in a bore of the inner sleeve extending transversely to the direction of rotation.
  • the DE 20 2009 014 890 Ul describes a quick-change chuck with outer sleeve with ring magnet, which is held by a tensioned spring in a stop position.
  • a similarly designed adapter describes the DE 20 2008 011 143 Ul.
  • a bit holder In such a chuck, a bit holder can be inserted.
  • a screwdriver bit In the insertion of the bit holder, a screwdriver bit can be inserted, as described for example by WO 2010/054169 AI.
  • the periodically on the screwdriver Herbit generated angular momentum generate very high torque peaks depending on the pulse duration. Depending on the design of the rotary impact wrench, the torque peaks can reach up to 180 Nm or even more than 200 Nm. Depending on the design and / or operating mode, rotary impact wrenches work with 1500 or 2700 beats per minute.
  • the invention has for its object to further develop a generic torque transmitting device nutzsvorteilhaft and in particular for use on impact wrenches.
  • the outer sleeve is held by a magnetic attraction of the ring magnet in the second, that is retracted stop position. Unlike the prior art, this attraction must be overcome in order to displace the outer sleeve from this stop position in the direction of the first stop position or to separate the ring magnet from the opening edge of the insertion. If this attraction is overcome, then the ring magnet can be brought into an abutment position against the end face of the head of a screw in the fferwerkmaschinegneeingriffsö réelle the working tip of the screwdriver bit inserted. The inner magnet is then held on the screw head due to its magnetic attraction.
  • the torque transmission device according to the invention in the form of a quick-change feed can also be used in an operating position in which the outer sleeve is held by the magnetic attraction in a distance position to the screw head and the magnet in an abutment position at the opening edge. This operating position is retained even when the quick-change chuck is driven by a rotary impact driver.
  • an energy store is arranged between a drive section of the drive shaft, which can be inserted into the chuck of a rotary impact wrench, and an output section, which is formed by the insertion opening.
  • this energy store can rotate by a twist angle. The energy store charges up.
  • the energy store can also be dimensioned so that the introduced in the form of rotational shocks via the drive section in the energy storage rotational pulses are such temporally stretched or attenuated delivered via the output section that the torque peaks of the emitted energy pulses are below the static breaking torque of the respective ffertechnik Wegtechniksspitze. As a result, the life of both the chuck and the screwdriver bit increases.
  • a quick-change chuck formed with such a torsion zone is used on a rotary impact driver and the outer sleeve assumes its operating position, in which the ring magnet bears against the end face of a screw head in order to keep the screw in alignment with the axis of rotation, the impacts or vibrations cause it the outer sleeve vibrates in the direction of displacement, whereby the magnet releases from the contact position on the screw head.
  • the vibrations are damped by the torsion zone in such a way that the outer sleeve is always displaced back into the contact position of the magnet against the end face of the screw head, in particular by the force of the magnet.
  • the torsion zone and the strength of the ring magnet are coordinated so that the vibrations during screwing with a rotary impact driver only slight spacings of the ring magnet from the front side of the screw effect benkopfes.
  • the spacing of the ring magnet is never greater than the attraction region of the ring magnet, so that the magnetic attraction always leads to a shift back of the ring magnet in the contact position on the screw head.
  • the torsion zone is too small or does not exist at all, it can lead to a rapid breakage of the screw insert and cause the outer sleeve to jump off the screw head so far that the ring magnet strikes against the edge of the insertion opening, with the result that the outer sleeve remains fixed in this stop position.
  • the assembly of the torque transmitting device is simple, since the rear stop is formed by a sleeve inner stage of the outer sleeve and a counter-stop corresponding thereto from an outer ring stage of the inner sleeve.
  • the outer sleeve which is initially not yet provided with the ring magnet, is passed over the clamping section of the
  • the energy store formed by the torsion zone is arranged inside the inner sleeve.
  • the energy store is located between two hexagonal sections, with a shaft end side hexagonal section inserted in the inner sleeve in a rotationally and axially fixed manner.
  • the other hexagonal section extends through a hexagon opening of the inner sleeve with a stop-limited rotary motion clearance. It may be provided outside the inner sleeve, a second torsion zone.
  • the inner sleeve, but also the outer sleeve can be made of a ferromagnetic material see.
  • edge portion of the insertion consists of a ferromagnetic material or even magnetic, so that the ring magnet is held by magnetic attraction in its stop position at the opening edge.
  • This power of attraction can only be overcome by intentionally pulling on the outer sleeve. This tensile force is greater than the maximum inertial forces due to vibration when screwing with a rotary impact driver.
  • the invention further relates to the use of a torque transmitting device, as has been previously described with a
  • Rotary impact wrench as described in the introduction, which thus has a motor that operates a rotary blower, so that transferred to a coupled to the drive section feed at least 1000 strikes per minute, each rotary impact a peak torque of at least 60 Nm, preferably at least 75 Nm having.
  • a screwdriver bit with a non-circular output profile for entry into a ffertechnik Wegeintrittsö réelle a screw.
  • FIG. 1 is a side view of a torque transfer device in the form of a quick-change chuck for screwdriver bits.
  • Figure 2 is a section along the line II - II, wherein the ring magnet 13 abuts in an abutment position on the opening edge 12 of the insertion opening 3.
  • FIG. 4 is an exploded view of the torque transmitting device
  • Fig. 5 shows the use of the torque transmitting device with a percussion screwdriver, wherein the outer sleeve 11 assumes its inactive rearward position and
  • the torque transmission device 1 has a drive shaft 2, which forms a polygonal section 28 at one end, which press-fits into a reduced-diameter section of a cavity of an inner sleeve 10.
  • the end face 26 of this polygonal section 28 forms the bottom of a polygonal cross-section insertion opening 3 for receiving the hexagonal portion 14 of a screwdriver bit.
  • the polygonal section 28 is followed by a diameter-reduced torsion section 4, the length of which may be between 10 mm and 15 mm and whose diameter is less than 6 mm.
  • the material hardness of the torsion zone 4 is in the range between 44 HRC and 62 HRC.
  • the torsion section 4 is adjoined by a further polygonal section 18 which, with a slight rotational play, inserts into a polygonal polygonal opening 19 of the inner sleeve 10 with a larger diameter.
  • All aforementioned polygonal sections are hexagonal sections in the embodiment.
  • this stop position which is not shown in the figures, has a pressed-in an inlet opening 23 magnet 13 a maximum distance from the opening edge 12.
  • An end face 13 "of the magnet 13 forms an end face of the outer sleeve 11.
  • the inwardly facing end face 13 ' of the ring magnet 13 forms a stop surface which rests against the opening edge 12 in an inactive position of the outer sleeve 11.
  • the entire inner sleeve 10 is made of a ferromagnetic material.
  • the outer sleeve 11 is also preferably made of a ferromagnetic material and has on its outer side a wide diameter-reduced zone in which a labeling sleeve 30 is located.
  • a bit inserted in the insertion opening 3 has a profiled drive tip 15, which can be profiled for engagement in a cross-slot profile, in a Torx profile or the like.
  • This work tip 15 projects beyond not only the opening edge 12, but also the end face 13 "of the outer sleeve 11 when it is in the inactive position (see Figure 2).
  • the outer sleeve 11 can now be displaced in the direction of the working tip 15 in the axial direction of the torque transmission device 1 until the end face 13 "bears against the surface section of the end face of the screw head 21 surrounding the screwing tool inlet opening 22.
  • the direction of extension of the screw 20 thereby becomes tangential the extension direction of the torque transmission device 1 centered.
  • a hard screwing which occurs when a screw with metric thread is screwed into an internal thread, for example, a metallic workpiece as soon as the screw head touches the workpiece surface, occurs a high torque peak, as the rotational movement is abruptly decelerated.
  • This torque peak can be extended in time, since the torsion zone 4 is slightly twisted.
  • the maximum angle of rotation is limited to an axial shear angle of at most 2 °. This restriction can be dimensioned via a suitable choice of the play-loaded hexagonal handle 18, 19.
  • FIG. 5 shows a preferred mode of use of the torque transmission device 1 according to the invention in combination with a
  • Rotary impact wrench which has a drive unit 5, in which a drive motor 6 is located, which drives a rotary blower 7, which is over 1000 Turns per minute on a chuck 8 transmits. In the chuck 8, the drive portion of the drive shaft 2 is clamped.
  • the rotational strokes and the associated vibrations do not cause the outer sleeve 11 to shift.
  • the magnetic attraction of the magnet 13 at the opening edge 12 prevents the outer sleeve 11 from moving.
  • the lining is to be used in the operating position shown in FIG. 3, in which the end edge 13 "of the outer sleeve 11 rests against the screw head 21, then the torsion zone 4 causes such a temporal extension of the rotational shocks that the vibrations possibly lead to the outer sleeve 11 is slightly displaced away from the screw head 21.
  • the displacement distance is not greater than the attraction area of the ring magnet 13, so that the outer sleeve 11 remains in the spacing position only for a very short time before being returned to the screw head 21 from the ring magnet 13
  • the outer sleeve 11 also has a splinter protection function in combination with a rotary impact drive tool, with such a slight spacing being shown in FIG.
  • the outer sleeve 11 not only forms a centering aid to allow the one-handed screwing a screw.
  • the outer sleeve 11 forms a splinter contactor, in particular in the final phase of screwing in a wood screw.
  • the torque to be applied to the screw increases as the depth of engagement of the screw in the workpiece increases. Accordingly, high torque peaks are applied to the screwdriver bit 9, especially in the final phase of screwing. Although these torque peaks are damped by the two torsion zones 4 and 24. But it can happen that the Screwdriver bit 9 breaks. Because of the vibration-damping effect of the torsion zone 4, the outer sleeve 11 forms a nearly permanent splinter protection, so that in the case of a bit break the lateral throwing away of splinters is avoided.

Landscapes

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

Abstract

L'invention concerne un dispositif de transfert de couple (1), comprenant un arbre d'entraînement (2) insérable dans un mandrin (8) d'un dispositif d'entraînement en rotation, ledit arbre d'entraînement étant enfiché dans un manchon intérieur (10) qui présente une ouverture d'insertion (3) pour la réception d'un insert de tournevis (9), qui est configurée de façon que la pointe de travail profilée (15) de l'insert de tournevis (9) enfiché dans l'ouverture d'insertion (3) soit en saillie au-dessus du bord (12) de l'ouverture d'insertion (3), et un manchon extérieur (11) qui est déplaçable sur le manchon intérieur (10), suivant un mouvement de va-et-vient, limité par une butée, entre une première position de butée, dans laquelle une butée arrière (16) du manchon extérieur (11) vient à l'encontre d'une butée antagoniste arrière (17) du manchon intérieur (10), et un aimant annulaire (13) lié rigide avec le manchon extérieur (11), qui se trouve à distance, en avant du bord (12) de l'ouverture d'insertion (3), et une seconde position de butée dans laquelle l'aimant annulaire (13) se trouve au bord (12) de l'ouverture d'insertion (3). En vue d'obtenir un perfectionnement avantageux pour l'utilisation, en particulier pour l'application à des clés visseuses à percussion, l'invention est caractérisée en ce que le manchon extérieur (11) est maintenu en la seconde position de butée par une force d'attraction magnétique de l'aimant annulaire (13), ladite force d'attraction devant être surmontée, pour le déplacement du manchon extérieur (11) en direction de la première position de butée, par application d'une force de traction sur le manchon extérieur (11).
PCT/EP2012/052406 2011-02-14 2012-02-13 Dispositif de transfert de couple sous forme de mandrin pour mèches WO2012110453A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011000710.5 2011-02-14
DE201110000710 DE102011000710A1 (de) 2011-02-14 2011-02-14 Drehmomentübertragungseinrichtung in Form eines Bitfutters

Publications (1)

Publication Number Publication Date
WO2012110453A1 true WO2012110453A1 (fr) 2012-08-23

Family

ID=45592390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/052406 WO2012110453A1 (fr) 2011-02-14 2012-02-13 Dispositif de transfert de couple sous forme de mandrin pour mèches

Country Status (2)

Country Link
DE (1) DE102011000710A1 (fr)
WO (1) WO2012110453A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837468A3 (fr) * 2013-08-15 2015-11-04 Black & Decker Inc. Aimant flottant avec porte-embout à manchon
US9505108B2 (en) 2012-02-15 2016-11-29 Black & Decker Inc. Bit holder with floating magnet sleeve
USD789761S1 (en) 2015-11-02 2017-06-20 Black & Decker Inc. Torsion bit
US9943946B2 (en) 2012-02-15 2018-04-17 Black & Decker Inc. Tool bits with floating magnet sleeves
US10040179B2 (en) 2012-02-15 2018-08-07 Black & Decker Inc. Fastener tool assemblies
US10150205B2 (en) 2012-02-15 2018-12-11 Black & Decker Inc. Fastening tools with floating magnet sleeves
USD838566S1 (en) 2017-06-30 2019-01-22 Black & Decker Inc. Tool bit for driving threaded fasteners
USD877590S1 (en) 2018-07-20 2020-03-10 Milwaukee Electric Tool Corporation Tool accessory
US10792793B2 (en) 2017-06-30 2020-10-06 Black & Decker Inc. Tool bits with floating magnet sleeves
USD906081S1 (en) 2018-08-20 2020-12-29 Milwaukee Electric Tool Corporation Driver bit
US11342101B2 (en) 2018-07-20 2022-05-24 Milwaukee Electric Tool Corporation Magnetism booster assembly
US11413729B2 (en) 2018-08-20 2022-08-16 Milwaukee Electric Tool Corporation Tool bit

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TWI498196B (zh) * 2012-10-05 2015-09-01 China Pneumatic Corp 間接耦合之扭矩控制方法及其機構
AT521282A2 (de) * 2018-05-28 2019-12-15 Haxhaj Driton Mechanischer Bit-Halter
CN114227598B (zh) * 2021-12-27 2024-01-09 上海优拜机械股份有限公司 一种扭矩扳手磁吸锁紧机构

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DE20001865U1 (de) * 2000-02-03 2000-03-30 Hahn Willi Gmbh Spannfutter für Werkzeugeinsätze, insbesondere Schraubendreherbits
EP0988134B1 (fr) 1997-06-02 2002-01-09 WERA WERK HERMANN WERNER GMBH & CO. Mandrin de serrage pour embouts ou autres
DE202004004469U1 (de) * 2004-03-22 2004-05-27 Chang, Sheng-Ming, Daya Verbindungsstück für Schraubendreher
DE202006014850U1 (de) 2006-09-27 2006-11-23 Robert Bosch Gmbh Mechanisches Schlagwerk
DE102005048345A1 (de) 2005-10-10 2007-04-12 Robert Bosch Gmbh Handwerkzeugmaschinenzusatzeinheit
EP1260319B1 (fr) 2001-05-17 2007-12-19 Felo-Werkzeugfabrik Holland-Letz Gmbh Dispositif à visser pour des embouts de tournevis
DE202008011143U1 (de) 2008-08-21 2008-11-06 Liu, Tsai-Fa Adapter für motorbetriebene Schraubendrehereinsätze
EP2140978A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
EP2140976A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
EP2140977A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
DE202009015665U1 (de) 2009-11-27 2010-03-04 Liu, Paul, Da Li City Bit-Adapter mit Hilfsfesthalteeinrichtung
DE202009014890U1 (de) 2009-12-18 2010-04-01 Meng Rui Co., Ltd., Xianxi Township Schraubenanziehfähige Aufnahmevorrichtung für einen Schraubenzieher
WO2010054169A1 (fr) 2008-11-07 2010-05-14 Milwaukee Electric Tool Corporation Outil rapporté

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DE19804081B4 (de) * 1997-06-02 2014-01-02 Wera-Werk Hermann Werner Gmbh & Co. Kg Spannfutter für Bits oder dergleichen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0988134B1 (fr) 1997-06-02 2002-01-09 WERA WERK HERMANN WERNER GMBH & CO. Mandrin de serrage pour embouts ou autres
DE20001865U1 (de) * 2000-02-03 2000-03-30 Hahn Willi Gmbh Spannfutter für Werkzeugeinsätze, insbesondere Schraubendreherbits
EP1260319B1 (fr) 2001-05-17 2007-12-19 Felo-Werkzeugfabrik Holland-Letz Gmbh Dispositif à visser pour des embouts de tournevis
DE202004004469U1 (de) * 2004-03-22 2004-05-27 Chang, Sheng-Ming, Daya Verbindungsstück für Schraubendreher
DE102005048345A1 (de) 2005-10-10 2007-04-12 Robert Bosch Gmbh Handwerkzeugmaschinenzusatzeinheit
DE202006014850U1 (de) 2006-09-27 2006-11-23 Robert Bosch Gmbh Mechanisches Schlagwerk
EP2140977A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
EP2140978A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
EP2140976A1 (fr) 2008-07-01 2010-01-06 Metabowerke Gmbh Vis autotaraudeuse à frapper
DE202008011143U1 (de) 2008-08-21 2008-11-06 Liu, Tsai-Fa Adapter für motorbetriebene Schraubendrehereinsätze
WO2010054169A1 (fr) 2008-11-07 2010-05-14 Milwaukee Electric Tool Corporation Outil rapporté
DE202009015665U1 (de) 2009-11-27 2010-03-04 Liu, Paul, Da Li City Bit-Adapter mit Hilfsfesthalteeinrichtung
DE202009014890U1 (de) 2009-12-18 2010-04-01 Meng Rui Co., Ltd., Xianxi Township Schraubenanziehfähige Aufnahmevorrichtung für einen Schraubenzieher

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10556329B2 (en) 2012-02-15 2020-02-11 Black & Decker Inc. Tool bits with floating magnet sleeves
US9505108B2 (en) 2012-02-15 2016-11-29 Black & Decker Inc. Bit holder with floating magnet sleeve
US9943946B2 (en) 2012-02-15 2018-04-17 Black & Decker Inc. Tool bits with floating magnet sleeves
US10040179B2 (en) 2012-02-15 2018-08-07 Black & Decker Inc. Fastener tool assemblies
US10150205B2 (en) 2012-02-15 2018-12-11 Black & Decker Inc. Fastening tools with floating magnet sleeves
EP2837468A3 (fr) * 2013-08-15 2015-11-04 Black & Decker Inc. Aimant flottant avec porte-embout à manchon
USD789761S1 (en) 2015-11-02 2017-06-20 Black & Decker Inc. Torsion bit
USD841425S1 (en) 2015-11-02 2019-02-26 Black & Decker Inc. Torsion bit
USD838566S1 (en) 2017-06-30 2019-01-22 Black & Decker Inc. Tool bit for driving threaded fasteners
USD885155S1 (en) 2017-06-30 2020-05-26 Black & Decker Inc. Tool bit for driving threaded fasteners
US10792793B2 (en) 2017-06-30 2020-10-06 Black & Decker Inc. Tool bits with floating magnet sleeves
US11342101B2 (en) 2018-07-20 2022-05-24 Milwaukee Electric Tool Corporation Magnetism booster assembly
US11783977B2 (en) 2018-07-20 2023-10-10 Milwaukee Electric Tool Corporation Magnetism booster assembly
USD877590S1 (en) 2018-07-20 2020-03-10 Milwaukee Electric Tool Corporation Tool accessory
US11883931B2 (en) 2018-08-20 2024-01-30 Milwaukee Electric Tool Corporation Tool bit
USD906081S1 (en) 2018-08-20 2020-12-29 Milwaukee Electric Tool Corporation Driver bit
USD933443S1 (en) 2018-08-20 2021-10-19 Milwaukee Electric Tool Corporation Driver bit
US11413729B2 (en) 2018-08-20 2022-08-16 Milwaukee Electric Tool Corporation Tool bit

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