US20120244788A1 - Power tool - Google Patents
Power tool Download PDFInfo
- Publication number
- US20120244788A1 US20120244788A1 US13/401,308 US201213401308A US2012244788A1 US 20120244788 A1 US20120244788 A1 US 20120244788A1 US 201213401308 A US201213401308 A US 201213401308A US 2012244788 A1 US2012244788 A1 US 2012244788A1
- Authority
- US
- United States
- Prior art keywords
- spindle
- inner member
- disc
- pair
- 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.)
- Abandoned
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Classifications
-
- 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
- B24B23/028—Angle tools
-
- 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
- B24B45/00—Means for securing grinding wheels on rotary arbors
Definitions
- a disc-like tool penetrated through a tip of a spindle is held between a nut member tightened on the tip of the spindle, and an inner member provided in a main body of the grinder and configured to prevent the nut member from rotating in a direction to loosen during operation of the brake device.
- This grinder includes the inner member having one wedge member, and the spindle having the other wedge member.
- the inner member slidingly contacts the other wedge member on the spindle, the inner member is pressed toward the disc-like tool, and then the nut member is pressed via the disc-like tool. Consequently, the nut member can be prevented from rotating in a direction to loosen.
- the disc-like tool is integrated with a spindle by being held between an inner member such as an inner flange and a nut member.
- an inner member such as an inner flange and a nut member.
- a user attaches the inner member configured to prevent the nut member from loosening to the spindle as disclosed in European Patent No. 1,663,574, he may misunderstand the inner member as a member configured only to prevent the nut member from loosening, and additionally attach a member configured to hold the disc-like tool.
- the pair of flange portions 16 A and 16 B are shaped to protrude in a radial direction of the spindle 16 at positions symmetrical with respect to the axis of the spindle 16 , and are provided integrally with the spindle 16 .
- the lower surfaces of the pair of flange portions 16 A and 16 B are tilted surfaces 19 A and 19 B that form a predetermined angle with respect to a plane perpendicular to the axis of the spindle 16 .
- the flange portions 16 A and 16 B are an example of the pressing portion of the present invention.
- the tilted surfaces 19 A and 19 B are an example of the pressing surface of the first inner member of the present invention, and the tilted surfaces 24 A and 24 B are an example of the pressed surface of the present invention.
Abstract
In a grinder, a spindle protruding from a main body including a brake device is provided with an inner member. The inner member contacts a pressing portion provided integrally with the spindle and is pressed toward a tip end of the spindle when the spindle is braked by the brake device. A nut member can be screwed on the tip end of the spindle so that a disc-like tool though which the spindle extends perpendicularly can be held between the inner member and the nut member. The inner member comprises a locking member that contacts the pressing portion and is pressed toward the disc-like tool when the brake device is operated, and an inner flange which is detachably attached to the locking member so as to be rotatable together with the locking member.
Description
- This application claims the entire benefit of Japanese Patent Application Number 2011-064688 filed on Mar. 23, 2011, the entirety of which is incorporated by reference.
- The present invention relates to power tools in which a disc-shaped tool is attached to a tip end of a spindle by a nut member.
- A grinder as an example of power tools typically includes a disc-like tool attached via a nut member to a tip end of a spindle protruding from a main body, and a brake device configured to brake the spindle. However, in the grinder including the brake device, the nut member may become loose during operation of the brake device. In order to prevent the nut member from loosening, European Patent No. 1,663,574 discloses a grinder which has a brake device and is configured to prevent a nut member from loosening. In this grinder, a disc-like tool penetrated through a tip of a spindle is held between a nut member tightened on the tip of the spindle, and an inner member provided in a main body of the grinder and configured to prevent the nut member from rotating in a direction to loosen during operation of the brake device.
- This grinder includes the inner member having one wedge member, and the spindle having the other wedge member. When the wedge member in the inner member slidingly contacts the other wedge member on the spindle, the inner member is pressed toward the disc-like tool, and then the nut member is pressed via the disc-like tool. Consequently, the nut member can be prevented from rotating in a direction to loosen.
- In common methods for attaching a disc-like tool to a spindle, the disc-like tool is integrated with a spindle by being held between an inner member such as an inner flange and a nut member. However, even when a user attaches the inner member configured to prevent the nut member from loosening to the spindle as disclosed in European Patent No. 1,663,574, he may misunderstand the inner member as a member configured only to prevent the nut member from loosening, and additionally attach a member configured to hold the disc-like tool.
- If the member to hold the disc-like tool is attached by mistake between the disc-like tool and the inner member to prevent the nut member from loosening, the inner member to prevent the nut member from loosening may be prevented from moving toward the disc-like tool during operation of the brake device. In this case, the nut member cannot be prevented from loosening.
- The present invention is proposed in view of the above problems, and it is an object of the present invention to provide a power tool which is configured to prevent a nut member screwed on the spindle from loosening during operation of a brake device, wherein the power tool includes an inner member comprising a member to prevent the nut member from loosening and a member to hold a tool.
- According to a first aspect of the present invention, a power tool includes a main body, a brake device provided in the main body, a spindle protruding from the main body, an inner member provided on the spindle, a pressing portion provided integrally with the spindle, a nut member that can be screwed on a tip end of the spindle and a disc-like tool though which the spindle extends perpendicularly so that the disc-like tool can be held between the inner member and the nut member. In the power tool, the inner member comprises a first inner member and a second inner member. The first inner member contacts the pressing portion and is pressed toward the disc-like tool when the brake device is operated. The second inner member through which the spindle extends is detachably attached to the first inner member and rotatable together with the first inner member. Further, the disc-like tool can be held between the second inner member and the nut member when the second inner member is attached to the first inner member.
- According to a second aspect of the present invention, in the first aspect, a width-across-flat portion parallel to a direction perpendicular to an axis of the spindle is provided on an outer periphery of the first inner member.
- According to a third aspect of the present invention, in the first aspect, the pressing portion is a pair of flange portions that are provided to protrude in a radial direction of the spindle at positions symmetrical with respect to an axis of the spindle. Further, the pair of flange portions has a pressing surface facing the first inner member, while the first inner member has a fitting recess as a pressed surface in which the pair of flange portions is fitted with play so that the pressing surface of the pair of flange portions contacts a bottom of the fitting recess.
- According to the power tool of the first aspect of the present invention, the first inner member to prevent the nut member from loosening and the second inner member to attach the disc-like tool to the spindle by holding the tool with the nut member are provided as separate members. Accordingly, it becomes easier for users to recognize the member to prevent the nut member form loosening and the member to hold the disc-like tool. Therefore, another member to hold the disc-like tool is prevented from being additionally attached by mistake, which allows the first inner member to reliably prevent the nut member from loosening when the spindle is braked by the brake device. Therefore, the nut member can be prevented from loosening.
- According to the second aspect of the present invention, rotation of the spindle can be stopped by engaging a tool such as a spanner on the width-across-flat portion of the first inner member that contacts the spindle. Therefore, the nut member is easily attached to or detached from the spindle whose rotation has been stopped. Accordingly, easy assembly can improve both the efficiency of the operation of holding the disc-like tool between the second inner member and the nut member to attach the disc-like tool to the spindle, and the efficiency of the operation of removing the disc-like tool together with the nut member from the
spindle 16. - According to the third aspect of the present invention, rotation of the spindle can be transmitted to the first inner member with the pair of flange portions being fitted in the fitting recess of the first inner member, and an inertial force of the disc-like tool can be received by the entire flange portions fitted in the fitting recess. Therefore, concentration of the inertial force on a part of the flange portions can be suppressed, and damage to the flange portions can be prevented.
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FIG. 1 is a longitudinal cross-sectional view of a main part of a grinder according to an embodiment of the present invention. -
FIG. 2 is an exploded perspective view of a spindle, a locking member, and an inner flange. -
FIG. 3 is a general view of the spindle. -
FIG. 4 is an enlarged view of a portion A inFIG. 3 . -
FIG. 5 is a plan view of the locking member. -
FIG. 6 is a cross-sectional view taken along line B-B inFIG. 5 . - An embodiment of the present invention will be described with reference to
FIGS. 1 to 6 . As shown inFIG. 1 , a grinder 1 includes ahousing 10, alocking member 20, aninner flange 30, alock nut 40, and abrake device 50. It should be noted that the grinder 1 is an example of the power tool of the present invention. - The
housing 10 comprises acylindrical motor housing 11 and agear housing 15. A motor M is accommodated in themotor housing 11, and arotation shaft 12 of the motor M is rotatably supported in themotor housing 11 via abearing 13. Afirst bevel gear 14 is provided on a tip end of therotation shaft 12. - The
gear housing 15 is attached in front of themotor housing 11, and therotation shaft 12 protrudes from themotor housing 11 into thegear housing 15. In addition, aspindle 16 is rotatably supported in thegear housing 15 via abearing 17 so as to extend perpendicularly to therotation shaft 12. Asecond bevel gear 18 is fitted on an upper part of thespindle 16. Thefirst bevel gear 14 meshes with thesecond bevel gear 18, whereby rotation of therotation shaft 12 is transmitted to thespindle 16. A lower end of thespindle 16 protrudes below thegear housing 15. A pair offlange portions portion 16C are formed on a part of thespindle 16 which protrudes from thegear housing 15. It should be noted that thehousing 10 is an example of the main body of the present invention. - As shown in
FIGS. 2 and 3 , the pair offlange portions spindle 16 at positions symmetrical with respect to the axis of thespindle 16, and are provided integrally with thespindle 16. As shown inFIGS. 3 and 4 , the lower surfaces of the pair offlange portions surfaces spindle 16. - The
locking member 20 is a disc-like member, and as shown inFIGS. 2 , 5, and 6, includes width-across-flat portions 21 and afitting recess 22. The width-across-flat portions 21 are formed on the outer periphery of thelocking member 20, and extend parallel with each other on both sides of thespindle 16 in a direction perpendicular to the axis of thespindle 16. Thefitting recess 22 opens in an upper surface of thelocking member 20, and theflange portions fitting recess 22 with play in a rotation direction. Aninsertion hole 23 through which the lower end of thespindle 16 is inserted is formed in the center of a bottom surface of thefitting recess 22. - Tilted
surfaces fitting recess 22. Thetilted surfaces tilted surfaces flange portions fitting recess 22. Thetilted surfaces flange portions tilted surfaces flange portions fitting recess 22. Aprotrusion 25 that protrudes downward is formed on the lower surface of the lockingmember 20. Theinsertion hole 23 extends through theprotrusion 25. - As shown in
FIG. 2 , theinner flange 30 is a disc-like member having a larger diameter than the lockingmember 20, and includes arecess groove 31 and a throughhole 32. Therecess groove 31 extends in a direction perpendicular to the axis of thespindle 16. Theinner flange 30 can be attached to or detached from the lockingmember 20 by engaging or disengaging theprotrusion 25 of the lockingmember 20 with or from therecess groove 31. With theinner flange 30 being attached to the lockingmember 20, thespindle 16 inserted through theinsertion hole 23 is inserted through the throughhole 32 as well, and thus extends through theinner flange 30. - As shown in
FIG. 1 , thelock nut 40 can be attached to a tip end of thespindle 16 by screwing the externally threadedportion 16C into a screw hole (not shown). Thespindle 16 extends through a disc-like grinding stone 45 provided perpendicularly to thespindle 16. The grindingstone 45 is held between theinner flange 30 attached to the lockingmember 20 and thelock nut 40 attached to the tip end of thespindle 16, and thus is fixed to thespindle 16. A rear part of the grindingstone 45 is covered by asafety cover 46 mounted below thegear housing 15. In the present embodiment, theinner flange 30 need not necessarily be attached to the lockingmember 20, and the grindingstone 45 may be fixed to thespindle 16 by holding the grindingstone 45 between the lockingmember 20 and thelock nut 40. The grindingstone 45 is an example of the disc-like tool of the present invention, and thelock nut 40 is an example of the nut member of the present invention. The lockingmember 20 is an example of the first inner member of the present invention, and theinner flange 30 is an example of the second inner member of the present invention. - The
brake device 50 is provided to stop rotation of thespindle 16 by braking therotation shaft 12 of the motor M, and is accommodated in a front part of themotor housing 11. As shown inFIG. 1 , thebrake device 50 includes abrake plate 51, abrake member 52, and a coiled spring B. - The
brake plate 51 is a cylindrical member having a disc-like flange portion provided on the periphery thereof, and is mounted on therotation shaft 12. Thebrake member 52 is placed in front of thebrake plate 51 in an axial direction of therotation shaft 12. Abrake shoe 53 is fixed to a rear surface of thebrake member 52 that faces thebrake plate 51. The coiled spring B is fitted in themotor housing 11, and biases thebrake member 52 in a direction to bring thebrake member 52 into contact with thebrake plate 51. Thebrake member 52 is separated from thebrake plate 51 in response to the operation of turning on a drive switch (not shown) of the motor M, and thebrake shoe 53 is pressed hard against thebrake plate 51 by a biasing force of the coiled spring B in response to the operation of turning off the drive switch so that rotation of therotation shaft 12 and thespindle 16 can be stopped in this manner. - Operation of the grinder 1 will be described below. When the grinding
stone 45 is fixed to thespindle 16, thespindle 16 is first inserted through theinsertion hole 23 of the lockingmember 20. Theflange portions fitting recess 22 of the lockingmember 20 so that the tiltedsurfaces surfaces member 20 is attached to thespindle 16 via a C ring so as to be retained on thespindle 16. Then, after thespindle 16 is inserted through the throughhole 32 of theinner flange 30, theprotrusion 25 of the lockingmember 20 is engaged with therecess groove 31 of theinner flange 30 to attach theinner flange 30 to the lockingmember 20. Moreover, thelock nut 40 is screwed onto thespindle 16 extending through the grindingstone 45, so that the grindingstone 45 is held between theinner flange 30 and thelock nut 40. - If the motor M is driven and rotation of the
rotation shaft 12 is transmitted to thespindle 16 in the above state, thespindle 16 rotates in a direction to tighten thelock nut 40. At this time, since theflange portions fitting recess 22, the side surfaces of theflange portions inner surface 22A (seeFIG. 5 ) of thefitting recess 22. Therefore, rotation of thespindle 16 is transmitted to the lockingmember 20. As a result, theinner flange 30 having the lockingmember 20 attached thereto rotates together with the lockingmember 20. - On the other hand, when driving of the motor M is stopped, the
brake shoe 53 of thebrake device 50 is pressed against thebrake plate 51, and rotation of therotation shaft 12 is stopped by the torque in a direction opposite to the rotation direction of therotation shaft 12. At this time, thelock nut 40 is subjected to a force in a direction to loosen thelock nut 40, by the friction with the grindingstone 45 that tends to keep rotating due to inertia. - However, as described below, the locking
member 20 is configured to prevent thelock nut 40 from loosening in the direction to loosen the lock nut 40 (a locking mechanism). That is, if rotation of therotation shaft 12 is stopped, the tiltedsurfaces flange portions surfaces member 20. Therefore, the tiltedsurfaces surfaces stone 45, and then theinner flange 30 attached to the lockingmember 20 is pressed toward the grindingstone 45. Therefore, thelock nut 40 is pressed via the grindingstone 45 so as to prevent thelock nut 40 from rotating in the direction to loosen thelock nut 40. Theflange portions surfaces - Rotation of the
spindle 16 can be prevented by engaging, e.g., a spanner on the width-across-flat portions 21 of the lockingmember 20 attached to thespindle 16. Thus, for example, when replacing the worn grindingstone 45, thelock nut 40 can be easily attached to or detached from thespindle 16 whose rotation has been stopped. Accordingly, the grindingstone 45 can be easily replaced with a new one. - In the grinder 1 of the present embodiment, the locking
member 20 to prevent thelock nut 40 from loosening and theinner flange 30 to fix the grindingstone 45 to thespindle 16 are provided as separate members. Accordingly, it becomes easier for users to recognize the member to prevent thelock nut 40 from loosening and the member to fix the grindingstone 45. Therefore, in order to fix the grindingstone 45, a member except theinner flange 30 can be prevented from being additionally attached to thespindle 16, which allows the lockingmember 20 to reliably prevent thelock nut 40 from loosening when rotation of thespindle 16 is stopped by thebrake device 50. Therefore, thelock nut 40 can be prevented from loosening. - Rotation of the
spindle 16 can be stopped by engaging a spanner on the width-across-flat portions 21 of the lockingmember 20 having theflange portions spindle 16 fitted therein. Therefore, it becomes easier for users to attach or detach thelock nut 40 to or from thespindle 16 whose rotation has been stopped. Consequently, easy assembly can improve both the efficiency of the operation of holding the grindingstone 45 between theinner flange 30 and thelock nut 40 to fix the grindingstone 45 to thespindle 16, and the efficiency of the operation of removing the grindingstone 45 together with thelock nut 40 from thespindle 16. - Since rotation of the
spindle 16 is transmitted to the lockingmember 20 with theflange portions fitting recess 22 of the lockingmember 20, an inertial force of the grindingstone 45 can be received by theentire flange portions fitting recess 22. Therefore, concentration of the inertial force on a part of theflange portions flange portions - The present invention is not limited to the above embodiment, and a part of the configuration can be modified as appropriate without departing from the scope and spirit of the invention. For example, a recess may be provided in the
inner flange 30 instead of therecess groove 31, and theinner flange 30 can be attached to or detached from the lockingmember 20 by fitting theprotrusion 25 of the lockingmember 20 in the recess. Unlike the above embodiment, theinner flange 30 may have a protrusion protruding upward, and the lockingmember 20 may have a recess groove with and from which the protrusion is engaged or disengaged, so that theinner flange 30 can be attached to or detached from the lockingmember 20. - The locking
member 20 may not have the width-across-flat portions 21, and thebrake device 50 may be an electric brake that brakes the motor M. Although the above embodiment is described with respect to an example in which the present invention is applied to a grinder, the present invention is not limited to this, and may be applied to power tools such as a sander. - It is explicitly stated that all features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original disclosure as well as for the purpose of restricting the claimed invention independent of the composition of the features in the embodiments and/or the claims. It is explicitly stated that all value ranges or indications of groups of entities disclose every possible intermediate value or intermediate entity for the purpose of original disclosure as well as for the purpose of restricting the claimed invention, in particular as limits of value ranges.
Claims (5)
1. A power tool, comprising:
a main body;
a brake device provided in the main body;
a spindle protruding from the main body;
an inner member provided on the spindle;
a pressing portion provided integrally with the spindle;
a nut member that can be screwed on a tip end of the spindle; and
a disc-like tool though which the spindle extends perpendicularly so that the disc-like tool can be held between the inner member and the nut member, wherein
the inner member comprises a first inner member that contacts the pressing portion and is pressed toward the disc-like tool when the brake device is operated, and a second inner member through which the spindle extends is detachably attached to the first inner member and rotatable together with the first inner member, wherein the disc-like tool can be held between the second inner member and the nut member when the second inner member is attached to the first inner member.
2. The power tool according to claim 1 , wherein
a width-across-flat portion parallel to a direction perpendicular to an axis of the spindle is provided on an outer periphery of the first inner member.
3. The power tool according to claim 1 , wherein
the pressing portion is a pair of flange portions that are provided to protrude in a radial direction of the spindle at positions symmetrical with respect to an axis of the spindle, and the pair of flange portions has a pressing surface facing the first inner member,
while the first inner member has a fitting recess as a pressed surface in which the pair of flange portions is fitted with play so that the pressing surface of the pair of flange portions contacts a bottom of the fitting recess.
4. The power tool according to claim 3 , wherein
the pressing surface is a pair of first tilted surfaces that form a predetermined angle with respect to a plane perpendicular to the axis, and
the pressed surface is a pair of second tilted surfaces that can contact the pair of first tilted surfaces with the pair of flange portions being fitted in the fitting recess.
5. The power tool according to claim 1 , wherein
one of the first inner member and the second inner member has a protrusion that protrudes toward the other inner member, and the other inner member has a recess groove with and from which the protrusion can be engaged and disengaged, and
the first inner member can be attached to the second inner member by engaging the protrusion with the recess groove.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011064688A JP2012200794A (en) | 2011-03-23 | 2011-03-23 | Electric tool |
JP2011-064688 | 2011-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120244788A1 true US20120244788A1 (en) | 2012-09-27 |
Family
ID=45656500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/401,308 Abandoned US20120244788A1 (en) | 2011-03-23 | 2012-02-21 | Power tool |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120244788A1 (en) |
EP (1) | EP2502704A1 (en) |
JP (1) | JP2012200794A (en) |
CN (1) | CN102689293A (en) |
RU (1) | RU2012111083A (en) |
Cited By (9)
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---|---|---|---|---|
US20120012429A1 (en) * | 2010-07-16 | 2012-01-19 | Makita Corporation | Installment structure for braking mechanism in power tool |
US20130284551A1 (en) * | 2010-10-29 | 2013-10-31 | Robert Bosch Gmbh | Power Tool Braking Device |
US8913967B2 (en) | 2010-04-20 | 2014-12-16 | Rf Micro Devices, Inc. | Feedback based buck timing of a direct current (DC)-DC converter |
US8942650B2 (en) | 2010-04-20 | 2015-01-27 | Rf Micro Devices, Inc. | RF PA linearity requirements based converter operating mode selection |
US8958763B2 (en) | 2010-04-20 | 2015-02-17 | Rf Micro Devices, Inc. | PA bias power supply undershoot compensation |
US8983407B2 (en) | 2010-04-20 | 2015-03-17 | Rf Micro Devices, Inc. | Selectable PA bias temperature compensation circuitry |
US9030256B2 (en) | 2010-04-20 | 2015-05-12 | Rf Micro Devices, Inc. | Overlay class F choke |
US11396078B2 (en) * | 2019-06-10 | 2022-07-26 | Makita Corporation | Grinder |
US11426838B2 (en) | 2017-07-14 | 2022-08-30 | Makita Corporation | Rotating tool |
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CN107471044A (en) * | 2016-06-08 | 2017-12-15 | 南京德朔实业有限公司 | Hand held electric tool |
CN110177659B (en) * | 2017-01-13 | 2022-10-18 | 株式会社牧田 | Electric tool |
US11806857B2 (en) | 2020-08-28 | 2023-11-07 | Black & Decker, Inc. | Airflow intake configuration in power tool |
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-
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- 2012-02-21 US US13/401,308 patent/US20120244788A1/en not_active Abandoned
- 2012-02-23 EP EP12156650A patent/EP2502704A1/en not_active Withdrawn
- 2012-03-22 RU RU2012111083/02A patent/RU2012111083A/en unknown
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Cited By (11)
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US8942650B2 (en) | 2010-04-20 | 2015-01-27 | Rf Micro Devices, Inc. | RF PA linearity requirements based converter operating mode selection |
US8958763B2 (en) | 2010-04-20 | 2015-02-17 | Rf Micro Devices, Inc. | PA bias power supply undershoot compensation |
US8983407B2 (en) | 2010-04-20 | 2015-03-17 | Rf Micro Devices, Inc. | Selectable PA bias temperature compensation circuitry |
US9030256B2 (en) | 2010-04-20 | 2015-05-12 | Rf Micro Devices, Inc. | Overlay class F choke |
US20120012429A1 (en) * | 2010-07-16 | 2012-01-19 | Makita Corporation | Installment structure for braking mechanism in power tool |
US8596427B2 (en) * | 2010-07-16 | 2013-12-03 | Makita Corporation | Installment structure for braking mechanism in power tool |
US20130284551A1 (en) * | 2010-10-29 | 2013-10-31 | Robert Bosch Gmbh | Power Tool Braking Device |
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US11426838B2 (en) | 2017-07-14 | 2022-08-30 | Makita Corporation | Rotating tool |
US11396078B2 (en) * | 2019-06-10 | 2022-07-26 | Makita Corporation | Grinder |
Also Published As
Publication number | Publication date |
---|---|
JP2012200794A (en) | 2012-10-22 |
RU2012111083A (en) | 2013-09-27 |
CN102689293A (en) | 2012-09-26 |
EP2502704A1 (en) | 2012-09-26 |
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Owner name: MAKITA CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NUMATA, FUMITOSHI;REEL/FRAME:027759/0922 Effective date: 20120210 |
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