公开(公告)号：US20200282590A1

公开(公告)日：2020-09-10

申请号：US16880574

申请日：2020-05-21

Applicant: MAKITA CORPORATION

Inventor： Hideki KACHI ,  Koji Haneda ,  Tsunahisa Nakamura

IPC: B27G19/00 ,  F16P3/20 ,  B27B17/00 ,  B27B17/02

Abstract: A chainsaw includes a handle with a handgrip; an electric motor for endlessly moving a saw chain; a control unit for controlling rotation of the motor; and a main power switch switchable between an ON state and an OFF state. The handgrip is provided with a gripping detection device for detecting whether the handgrip is gripped by the worker, and the chainsaw is configured to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is gripped, maintain the main power switch in the ON state, and to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is not gripped, switch the main power switch to the OFF state.

公开(公告)号：US10981291B2

公开(公告)日：2021-04-20

申请号：US16522722

申请日：2019-07-26

Applicant: MAKITA CORPORATION

Inventor： Koji Haneda ,  Hideki Kachi ,  Yasuyuki Kawabata

IPC: B27B17/08 ,  B27B17/02 ,  B27B17/00

Abstract: To provide an easy-to-use electric chainsaw that uses, in place of a large battery pack with a high voltage rating that would have been used in conventional electric chainsaws, a battery power source composed of a set of small commonly used battery packs of the same rating. An electric chainsaw having a built-in electric motor that is powered by a rechargeable battery, wherein a set of commonly used battery packs of the same rating is used as the rechargeable battery. The set of battery packs is mounted at the back of the main housing so that the center of gravity (G) of the chainsaw is positioned within a range (R) of 1.5 time the width (W) of the grip section of a rear handle between the left and right sides of a center line that is centered in the horizontal direction.

公开(公告)号：US10406713B2

公开(公告)日：2019-09-10

申请号：US15328364

申请日：2015-07-08

Applicant: MAKITA CORPORATION

Inventor： Koji Haneda ,  Hideki Kachi ,  Yasuyuki Kawabata

IPC: B27B17/08 ,  B27B17/02 ,  B27B17/00

Abstract: To provide an easy-to-use electric chainsaw that uses, in place of a large battery pack with a high voltage rating that would have been used in conventional electric chainsaws, a battery power source composed of a set of small commonly used battery packs of the same rating. An electric chainsaw having a built-in electric motor that is powered by a rechargeable battery, wherein a set of commonly used battery packs of the same rating is used as the rechargeable battery. The set of battery packs is mounted at the back of the main housing so that the center of gravity (G) of the chainsaw is positioned within a range (R) of 1.5 time the width (W) of the grip section of a rear handle between the left and right sides of a center line that is centered in the horizontal direction.

公开(公告)号：US09713880B2

公开(公告)日：2017-07-25

申请号：US14765141

申请日：2014-01-31

Applicant: MAKITA CORPORATION

Inventor： Koji Haneda ,  Jiro Oda ,  Hideaki Sugiura ,  Daisuke Suzuki

IPC: H02J7/00 ,  B27B17/02 ,  B27B17/00 ,  B25F5/02

CPC classification number: B27B17/02 ,  B25F5/02 ,  B27B17/00 ,  B27B17/0008

Abstract: A chainsaw includes a body housing, an elongated guide bar projecting forward from the body housing, a saw-chain mounted on the periphery of the guide bar for rotation, an electric motor mounted within the body housing for rotating, and a top handle provided on an upper portion of the body housing above the guide bar and extending in a fore-and-aft direction. A plurality of rechargeable battery packs is mounted on the body housing as a source of power supply for the electric motor. The battery packs are mounted to the body housing in such a manner that a center of gravity of the chainsaw observed from the back side is positioned in a two times extent of lateral width of a gripe portion of the top handle at both sides of a vertical centerline of the gripe portion.

公开(公告)号：US11446841B2

公开(公告)日：2022-09-20

申请号：US16880574

申请日：2020-05-21

Applicant: MAKITA CORPORATION

Inventor： Hideki Kachi ,  Koji Haneda ,  Tsunahisa Nakamura

IPC: B27G19/00 ,  F16P3/20 ,  B27B17/00 ,  B27B17/02

Abstract: A chainsaw includes a handle with a handgrip; an electric motor for endlessly moving a saw chain; a control unit for controlling rotation of the motor; and a main power switch switchable between an ON state and an OFF state. The handgrip is provided with a gripping detection device for detecting whether the handgrip is gripped by the worker, and the chainsaw is configured to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is gripped, maintain the main power switch in the ON state, and to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is not gripped, switch the main power switch to the OFF state.

公开(公告)号：US11154943B2

公开(公告)日：2021-10-26

申请号：US15450091

申请日：2017-03-06

Applicant: MAKITA CORPORATION

Inventor： Hideki Kachi ,  Koji Haneda ,  Masaki Sakuragi

IPC: B23D57/02 ,  B27B17/00

Abstract: Disclosed is a chainsaw capable of making it less likely that vibrations due to driving of an electric motor and a endless movement of a saw chain are transmitted to a worker, thereby enabling the worker to become less likely to be fatigued even in work using the chainsaw. The chainsaw includes an electric motor provided inside a body casing; a guide bar provided in a front portion of the body casing in such a manner as to protrude forwardly; a saw chain provided around an outer periphery of the guide bar in an endlessly movable manner, and configured to be endlessly moved along the outer periphery of the guide bar under driving of the electric motor; a handle section provided with respect to the body casing, and configured to be gripped by a worker; and an anti-vibration member interposed between the body casing and the handle section.

公开(公告)号：US10695943B2

公开(公告)日：2020-06-30

申请号：US15742565

申请日：2016-07-07

Applicant: MAKITA CORPORATION

Inventor： Hideki Kachi ,  Koji Haneda ,  Tsunahisa Nakamura

IPC: B27G19/00 ,  B27B17/02 ,  B27B17/00 ,  F16P3/20

Abstract: A chainsaw includes a handle with a handgrip; an electric motor for endlessly moving a saw chain; a control unit for controlling rotation of the motor; and a main power switch switchable between an ON state and an OFF state. The handgrip is provided with a gripping detection device for detecting whether the handgrip is gripped by the worker, and the chainsaw is configured to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is gripped, maintain the main power switch in the ON state, and to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is not gripped, switch the main power switch to the OFF state.

公开(公告)号：US10328600B2

公开(公告)日：2019-06-25

申请号：US15513656

申请日：2015-10-01

Applicant: MAKITA CORPORATION

Inventor： Hideki Kachi ,  Yasuyuki Kawabata ,  Koji Haneda

IPC: B27B17/00 ,  B23D57/02 ,  B27B17/08 ,  B27B17/02 ,  B25F5/02 ,  B23D59/00

Abstract: An electric chainsaw includes a first handle having a grip portion that is provided with a trigger switch for activating an electric motor. The electric chainsaw includes a second handle having a laterally extending grip portion provided forward of the grip portion of the first handle. The electric chainsaw includes an indicator lamp for indicating a remaining charge amount of a battery pack, and a push-button type indicator switch for causing the indicator lamp to indicate the remaining charge amount. The indicator switch is provided at a position where the worker can operate the indicator switch by a finger of the other hand gripping the grip portion of the second handle.

公开(公告)号：US10322518B2

公开(公告)日：2019-06-18

申请号：US15450180

申请日：2017-03-06

Applicant: MAKITA CORPORATION

Inventor： Hideki Kachi ,  Koji Haneda

IPC: B27B17/02 ,  B25F5/00 ,  B27B17/00 ,  B25F5/02

Abstract: Disclosed is a chainsaw capable of introducing outside air into a body casing by rotation of a cooling fan to adequately cool a control unit provided inside the body casing. The chainsaw is configured to cool a control unit provided inside a body casing by a cooling fan being rotated under driving of an electric motor, wherein a handle comprises a base portion through which the handle (30) is attached to the body casing, and a grip formed to extend from the base portion in such a manner as to be grippable by a worker; and an air inlet is formed in a counter wall of the body casing opposed to the base portion of the handle, and wherein the base portion is attached to the counter wall of the body casing to cover the air inlet in an air introduceable state.