公开(公告)号：US10919175B2

公开(公告)日：2021-02-16

申请号：US16245648

申请日：2019-01-11

Applicant: MAKITA CORPORATION

Inventor： Yoshinori Shibata ,  Daisuke Suzuki ,  Takuma Niiyama

IPC: B27B17/02 ,  B23D57/02

Abstract: A chain saw may include a saw chain, a guide bar to which the saw chain is attached, a sprocket configured to move the saw chain along a periphery of the guide bar, a prime mover configured to rotate the sprocket, a housing that houses the prime mover, a bolt protruding from the housing and penetrating a hole provided in the guide bar, and a nut screwed to the bolt to fix the guide bar to the housing. The nut may be exposed to outside. A heat insulating structure may be provided on a heat transfer path between the nut and the guide bar.

公开(公告)号：USD1074364S1

公开(公告)日：2025-05-13

申请号：US29869633

申请日：2023-01-05

Applicant: MAKITA CORPORATION

Designer： Tatsuya Kobayashi ,  Takuma Niiyama

公开(公告)号：US11559916B2

公开(公告)日：2023-01-24

申请号：US16777390

申请日：2020-01-30

Applicant: MAKITA CORPORATION

Inventor： Takuma Niiyama

IPC: H02K9/06 ,  H02K7/14 ,  H02K5/04 ,  B27B17/00 ,  B23D57/02 ,  B25F5/00

Abstract: An electric working machine may include: a support rod constituted of metal; a tool disposed at a front end of the support rod; a motor configured to drive the tool; a control unit disposed at a rear end of the support rod and configured to control the motor; and a heat transfer structure configured to transfer heat from the control unit to the support rod.

公开(公告)号：US11707829B2

公开(公告)日：2023-07-25

申请号：US17016591

申请日：2020-09-10

Applicant: Makita Corporation

Inventor： Takuma Niiyama

IPC: B25F5/00 ,  A01G3/053 ,  A01G3/08 ,  F16H1/14 ,  F16H1/08

CPC classification number: B25F5/006 ,  A01G3/053 ,  A01G3/085 ,  F16H1/08 ,  F16H1/14

Abstract: A working machine may include a pipe, a body unit, a tool unit, a shaft, and a speed increaser. The body unit may be disposed at a rear end of the pipe and include a prime mover. The tool unit may be disposed at a front end of the pipe and include a front tool. The shaft may be disposed inside the pipe and be configured to transmit power of the prime mover to the front tool. The speed increaser may be disposed between the shaft and the front tool. The speed increaser may be configured to make a rotational speed of the front tool higher than a rotational speed of the shaft.

公开(公告)号：US10814517B2

公开(公告)日：2020-10-27

申请号：US16157387

申请日：2018-10-11

Applicant: MAKITA CORPORATION

Inventor： Daisuke Suzuki ,  Takuma Niiyama

IPC: B27B17/12 ,  A01G3/08 ,  B27B17/02 ,  B27B17/00 ,  B27B17/08 ,  B27B17/14

Abstract: A chain saw disclosed herein may include a motor configured to rotate a saw chain about a guide bar, a control unit configured to control a voltage applied to the motor, a body housing that houses the motor and the control unit, a battery detachably attached to the body housing, and a top handle provided above the body housing. The control unit may be disposed above the battery. In a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit may not overlap. In a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit may overlap at least partially.