公开(公告)号：US09962823B2

公开(公告)日：2018-05-08

申请号：US14554347

申请日：2014-11-26

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Machida

IPC: B25D17/24 ,  B25F5/02 ,  B25F5/00

CPC classification number: B25D17/24 ,  B25F5/006 ,  B25F5/02 ,  B25F5/026

Abstract: A hammer drill includes a main body which houses a driving motor having a brush and a brush holder unit which holds the brush and switches a position of the brush, and a main handle which is movable to the main body. Further, a coil spring which biases the handle is provided. In a state that the coil spring biases the handle, the handle is moved against the main body in a longitudinal direction of a hammer bit and vibration transmission from the main body to the handle is prevented. Further, interference of a lever of the brush holder unit and the handle is prevented by a part of an opening formed on the handle.

公开(公告)号：US20180117728A1

公开(公告)日：2018-05-03

申请号：US15785705

申请日：2017-10-17

Applicant: MAKITA CORPORATION

Inventor： Takahiro KAWAKAMI ,  Yoshinori SASAKI

IPC: B24B23/02 ,  B25F5/02 ,  B24B47/12

Abstract: A power tool, such as a grinder, includes a motor housing that houses a motor. A grip housing extends in a longitudinal direction of the power tool and has a first longitudinal end coupled to the motor housing, first and second battery-mount parts formed at a second longitudinal end, and a grip part disposed between the first and second longitudinal ends. First and second battery packs are respectively mountable on the first and second battery-mount parts, and the grip housing comprises an upper housing half joined to a lower housing half.

公开(公告)号：US20180114554A1

公开(公告)日：2018-04-26

申请号：US15792321

申请日：2017-10-24

Applicant: MAKITA CORPORATION

Inventor： Junichi KATAYAMA ,  Tomoo MURAMATSU

IPC: G11C7/10 ,  G11C5/14

CPC classification number: G11C7/1096 ,  G11C5/141 ,  H01M10/425 ,  H01M2010/4278 ,  H01M2220/30 ,  H02J7/00 ,  H02J7/0073 ,  H02J2007/0096 ,  H02J2007/0098

Abstract: A battery pack in one aspect of the present disclosure includes a rechargeable battery, a rewritable nonvolatile memory, a write request receiver, and a write controller. The rewritable nonvolatile memory includes storage areas including a write-inhibit area. The write request receiver receives a write request and data from a charger. The write request includes a first address assigned to a first storage area of the storage areas. The data includes a first data element. The write controller executes a write process for the received data. The write process includes avoiding writing the first data element to the first storage area in response to determining that the first storage area is the write-inhibit area.

公开(公告)号：US09950416B2

公开(公告)日：2018-04-24

申请号：US14784797

申请日：2014-04-16

Applicant: MAKITA CORPORATION

Inventor： Tomoyuki Kutsuna ,  Ryo Sunazuka ,  Yoshitaka Machida ,  Masahiro Ito

IPC: B25F5/00 ,  B25D17/04 ,  B25F5/02 ,  B25D17/24

CPC classification number: B25D17/043 ,  B25D17/24 ,  B25D2222/57 ,  B25F5/006 ,  B25F5/02 ,  B25F5/026

Abstract: To provide a handle that is effective at achieving both vibration resistance and usability. A handle attached to a tool body of a power tool has: a grip portion; a connecting portion that connects to the tool body; elastic element interposing regions that are formed between the grip portion and the connecting portion; elastic elements disposed in the elastic element interposing regions; a powder filling region formed between the grip portion and connecting portion; and a plurality of powder bodies that fill the powder filling region.

公开(公告)号：US20180099394A1

公开(公告)日：2018-04-12

申请号：US15724766

申请日：2017-10-04

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka ICHIKAWA ,  Hirokatsu YAMAMOTO ,  Ryo UMEMOTO ,  Kunihisa SHIMA

IPC: B25D16/00 ,  B25D17/24

CPC classification number: B25D16/006 ,  B25D17/043 ,  B25D17/24 ,  B25D2211/068 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2222/72 ,  B25D2250/121 ,  B25D2250/201 ,  B25D2250/221 ,  B25D2250/265

Abstract: An electric power tool according to one aspect of the present disclosure includes a main body, a motor, a tool holder configured to hold a tool bit, a hammer, a motion converter, a rotation transmitter, a first load detector, a second load detector, and a motor controller. The first load detector detects, based on information indicating a drive state of the motor, a load imposed from a work piece to the tool bit. The second load detector detects, based on information indicating a behavior of the main body, a load imposed from the work piece to the tool bit. The motor controller sets an upper limit of rotational speed of the motor to a predetermined no-load rotational speed in response to no-load on the tool bit being detected by both the first load detector and the second load detector.

公开(公告)号：US09941824B2

公开(公告)日：2018-04-10

申请号：US15413918

申请日：2017-01-24

Applicant: MAKITA CORPORATION

Inventor： Hitoshi Suzuki

IPC: H02P6/16 ,  H02P6/15 ,  H02P6/12 ,  A01D69/02

CPC classification number: H02P6/157 ,  A01D34/90 ,  A01D69/02 ,  H02P6/12 ,  H02P6/16 ,  H02P6/182

Abstract: An electric working machine according to one aspect of the present disclosure comprises a brushless motor, a rotational position sensor, a detector, and a calculator. The calculator detects, when the brushless motor is inertially rotated, a difference between a detection result obtained by the rotational position sensor and a detection result obtained by the detector and calculates a correction value, based on the difference, for correcting the detection result obtained by the rotational position sensor.

公开(公告)号：US09937638B2

公开(公告)日：2018-04-10

申请号：US15176468

申请日：2016-06-08

Applicant: MAKITA CORPORATION

Inventor： Fumitoshi Numata

IPC: B26D7/08 ,  B26D5/00 ,  B27B5/00 ,  B27B27/06 ,  B27B5/18 ,  B28D7/02 ,  B23D59/00 ,  B23D45/16 ,  B28D1/04

CPC classification number: B28D7/02 ,  B23D45/16 ,  B23D59/006 ,  B27B9/02 ,  B28D1/045

Abstract: A compression spring is retained in a spring retaining portion provided in a fixing cover. By a pressing portion formed in a main body cover, the compression spring can be pressed to generate a biasing force in an opening direction of the main body cover. The compression spring is retained in the spring retaining portion. Accordingly, the fixing cover and main body cover can be easily assembled.

公开(公告)号：US09937612B2

公开(公告)日：2018-04-10

申请号：US14842265

申请日：2015-09-01

Applicant: MAKITA CORPORATION

Inventor： Shinya Bito ,  Masanori Furusawa

IPC: B25D17/08 ,  B25D17/00 ,  B25D11/00 ,  B25D11/04 ,  B25D17/24 ,  B25D11/12

CPC classification number: B25D17/005 ,  B25D11/005 ,  B25D11/04 ,  B25D11/125 ,  B25D17/08 ,  B25D17/082 ,  B25D17/24 ,  B25D2211/068 ,  B25D2217/0088 ,  B25D2222/57 ,  B25D2250/345 ,  B25D2250/371

Abstract: It is an object of the invention to provide an impact tool having a rational mechanism in an idling state. According to the representative invention, in an idling state defined as a state in which a tool accessory 119 is not pressed against a workpiece and an impact bolt 145 transmits a striking force to the tool accessory 119, the tool accessory retainer 510 moves with respect to a tool accessory holder 117 by movement of the tool accessory 119 in the longitudinal direction, so that the striking force is cushioned.

公开(公告)号：US20180085908A1

公开(公告)日：2018-03-29

申请号：US15710294

申请日：2017-09-20

Applicant: MAKITA CORPORATION

Inventor： Masahiro WATANABE

IPC: B25F5/00

CPC classification number: B25F5/001 ,  B25B21/008 ,  B25B23/141 ,  B25B23/1427 ,  B25B23/147 ,  B25F5/00 ,  G08C17/02

Abstract: An electric power tool includes a motor and a controller. The controller is configured to control the motor. Specifically, the controller is configured to operate in at least two modes: a first mode and a second mode. The first mode includes a plurality of stages having different control conditions related to the motor. The second mode includes at least a common stage having control conditions same as those for a specific stage among the plurality of stages of the first mode. The common stage of the second mode starts more quickly than the specific stage of the first mode.

公开(公告)号：US20180076639A1

公开(公告)日：2018-03-15

申请号：US15689725

申请日：2017-08-29

Applicant: MAKITA CORPORATION

Inventor： Nobuyasu FURUI ,  Hitoshi Suzuki ,  Masaaki FUKUMOTO ,  Takuya UMEMURA ,  Kosuke ITO ,  Hitoshi Sengiku ,  Shuji Yoshikawa ,  Tatsuya Nagahama

IPC: H02J7/00 ,  G08C17/02 ,  B25F3/00 ,  B25F5/02 ,  B25F5/00 ,  G05B13/02

CPC classification number: H02J7/0042 ,  B25F3/00 ,  B25F5/00 ,  B25F5/02 ,  G05B13/024 ,  G08C17/02 ,  H02J7/0052

Abstract: A method for recharging a battery pack (40; 40′) includes attaching a portable charger (120) to a user, which portable charger comprises or is attached to a self-contained power supply (130, 140) and wherein a first charging port (132, 146) of the portable charger is disposed, e.g., on a belt (144) worn by the user, hanging the battery pack on the belt while the battery pack is physically engaged and in electrical communication with a power tool (10; 10′), and initiating a transfer of power from the charger to the battery pack when the first charging port is at least proximal to a second charging port (85, 148) that is in electrical communication with at least one battery cell (50) of the battery pack. A portable charging system capable of performing this method, as well as an adapter for use in performing this method, are also disclosed.