公开(公告)号：US11063543B2

公开(公告)日：2021-07-13

申请号：US16531519

申请日：2019-08-05

Applicant: MAKITA CORPORATION

Inventor： Akihiro Nakamoto ,  Hitoshi Suzuki

IPC: A01G20/47 ,  H02P27/06 ,  H02J7/00

Abstract: A voltage supplier in one aspect of the present disclosure includes a first voltage generator, a second voltage generator, a first switcher, a second switcher, a first booster, and a second booster. The first booster boosts a voltage lower than a first switching drive voltage to thereby generate the first switching drive voltage, and supplies the first switching drive voltage to the first switcher on a first supply path. The second booster boosts a voltage lower than a second switching drive voltage to thereby generate the second switching drive voltage, and supplies the second switching drive voltage to the second switcher on a second supply path.

公开(公告)号：US20210197290A1

公开(公告)日：2021-07-01

申请号：US17122500

申请日：2020-12-15

Applicant: MAKITA CORPORATION

Inventor： Yonosuke AOKI

IPC: B23B31/103 ,  B23B31/18

Abstract: A power tool includes a housing (10), a spindle (4) supported in the housing to be pivotable or rotatable about a driving axis, a clamping shaft (60) that is selectively movable in the up-down direction relative to the spindle, a biasing member (70), a release member (71) and an actuating member (50). The release member is selectively movable in the up-down direction relative to the spindle and is configured to selectively interrupt transmission of upward biasing force from the biasing member to the clamping shaft. The release member is also configured to be locked to the spindle in a locked position while transmission of the biasing force is being interrupted. The actuating member is movable upward in the up-down direction relative to the spindle in response to being pressed upward by a clamping part (64) or by a tool accessory (91) to thereby unlock the release member from the spindle.

公开(公告)号：US20210178568A1

公开(公告)日：2021-06-17

申请号：US16770492

申请日：2018-12-12

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka MACHIDA ,  Masanori FURUSAWA

IPC: B25F5/02 ,  B23Q11/00

Abstract: In a dust collector for electric power tool, while a casing includes a tubular suction opening portion disposed to protrude forward, a dust collecting route is formed in the casing to ensure capturing a dust suctioned with an air by a filter disposed in a dust box. The suction opening portion is abutted on a surface to be processed and a tool bit of a hammer drill is passable through the suction opening portion. The dust collecting route suctions the air from the suction opening portion and guides the air into the dust box disposed to the casing. The dust box includes a dust removal device (rubber) configured to directly act to the filter from outside to remove the dust accumulated on the filter.

公开(公告)号：US11031770B2

公开(公告)日：2021-06-08

申请号：US16099219

申请日：2017-04-26

Applicant: MAKITA CORPORATION

Inventor： Yuta Izutsu ,  Katsuhito Fujinami ,  Akira Ito

IPC: H02H3/20 ,  B25F5/00 ,  H02P27/06 ,  H02H7/122 ,  B23B45/02 ,  H02P29/024

Abstract: An electric working machine in one aspect of the present disclosure includes a main current-path, a driving unit including a motor and at least one first semiconductor-switching-element, a controller, a bypass current-path, a second semiconductor-switching-element, and a switch driver. The main current-path is arranged between a positive electrode and a negative electrode of a battery. The driving unit is situated in the main current path. The bypass current-path is arranged in parallel with the driving unit. The second semiconductor-switching-element is situated in the bypass current-path. The switch driver causes the second semiconductor-switching-element to interrupt the bypass current-path in an event that a voltage value of a drive voltage applied to the driving unit is less than a threshold value, and causes the second semiconductor-switching-element to complete the bypass current-path in an event that the voltage value is equal to or greater than the threshold value.

公开(公告)号：US11027344B2

公开(公告)日：2021-06-08

申请号：US16346893

申请日：2017-11-30

Applicant: MAKITA CORPORATION

Inventor： Toshiyuki Kani ,  Yukinori Suzuki

IPC: B23D45/04 ,  B23D47/02 ,  B27B5/20 ,  B27B5/29

Abstract: A cutting device main body with a saw blade in a tabletop cutting device, supported so as to be swingable in an up-to-down direction with respect to a table on which material to be cut is placed, aims to improve operability for attaching and detaching the battery. A sliding direction for attaching and detaching the battery is set to be a tilting direction angled with respect to an up-to-down moving direction of the cutting device main body in a surface direction of a cutting blade. Because of this configuration, all of an operation force for attaching and detaching the battery is not applied to the up-to-down moving direction of the cutting device main body. As a result, the cutting main body is not moved in an easy manner and operability for attaching and detaching the battery is improved.

公开(公告)号：US11007565B2

公开(公告)日：2021-05-18

申请号：US16476249

申请日：2018-01-09

Applicant: MAKITA CORPORATION

Inventor： Michisada Yabuguchi ,  Toshihito Yabunaka

IPC: B21J15/26 ,  B21J15/10 ,  B21J15/28 ,  B21J15/04 ,  B21J15/02

Abstract: A fastening tool using a fastener of a type which is configured such that swaging is completed while an end region of a shaft part of a bolt remains integrated with the shaft part, and more particularly, a technique that may help provide a compact device structure while facilitating output management required for swaging, in the fastening tool. The fastening tool is configured to fasten a workpiece with a bolt and a collar without breaking a shaft part of the bolt, and a control part performs swaging operation while controlling the driving current of a motor to become a specified target current value and completes the swaging operation based on rotation speed of the motor.

公开(公告)号：US20210140614A1

公开(公告)日：2021-05-13

申请号：US17068896

申请日：2020-10-13

Applicant: MAKITA CORPORATION

Inventor： Masao MIWA

IPC: F21V21/14 ,  F21V21/26 ,  F21V21/40

Abstract: A user can replace a battery smoothly. A portable lighting apparatus includes a guide pipe, a pole supported on the guide pipe in a manner movable in a vertical direction parallel to a central axis of the guide pipe, at least one light emitter at an upper end of the pole, a collar surrounding the guide pipe, a plurality of legs pivotally connected to the collar, and a battery mount located in an upper part of the guide pipe.

公开(公告)号：US20210129242A1

公开(公告)日：2021-05-06

申请号：US17078497

申请日：2020-10-23

Applicant: MAKITA CORPORATION

Inventor： Kenta NIWA

IPC: B23D53/12 ,  B23D55/06 ,  B23D55/08

Abstract: A portable band saw has a substantially equally balanced weight in the lateral direction. The portable band saw includes a battery mount to which a battery is attachable, a motor driven with electric power from the battery, a band saw blade being endless and rotatable with power generated by the motor, a body supporting the motor and the band saw blade, and a handle including a support connected to the body and extending in a vertical direction, and a grip connected to the support and extending in a front-rear direction. The motor has a center on one side of a center of the handle, and the battery has a center on another side of the center of the handle in a lateral direction.

公开(公告)号：US20210114195A1

公开(公告)日：2021-04-22

申请号：US17072484

申请日：2020-10-16

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Yoshitaka MACHIDA ,  Hitoshi IIDA ,  Kazuki NAKAGAWA

IPC: B25D16/00 ,  B25D11/06 ,  B25D17/24 ,  B25D11/10

Abstract: A power tool, such as a rotary hammer, includes a housing, an output shaft for mounting a tool accessary and a motor having a motor shaft that generates a rotational output for rotating and linearly hammering the output shaft. The rotational output of the motor shaft is coupled to the output shaft via a driving mechanism that includes a hammer mechanism. An intervening member is axially movable relative to the motor shaft and is operably coupled between the motor shaft and the hammer mechanism. The hammer mechanism and the output shaft are supported by a movable support that is axially movable relative to the housing. Because the output shaft and the driving mechanism are movable relative to the motor and the housing, which preferably includes handle, via the intervening member and the movable support during hammering operations, vibration generated during hammering operations can be dampened before reaching the housing.

公开(公告)号：US20210109134A1

公开(公告)日：2021-04-15

申请号：US17064697

申请日：2020-10-07

Applicant: MAKITA CORPORATION

Inventor： Hitoshi SUZUKI

IPC: G01R19/165 ,  G01R31/327 ,  G01R31/52

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a drive current path, a resistor, a first current detector, a second current detector, and a fault determiner. The drive current path supplies the drive current to the motor. The resistor is disposed on the drive current path so as to receive the drive current. The first current detector detects a first detection value based on a first electromagnetic phenomenon with respect to the resistor. The second current detector detects a second detection value based on a second electromagnetic phenomenon with respect to the resistor. The fault determiner performs a faulty state determination based on the first detection value and the second detection value.