公开(公告)号：US12059790B2

公开(公告)日：2024-08-13

申请号：US17684859

申请日：2022-03-02

Applicant: Makita Corporation

Inventor： Ryosuke Ito ,  Norihiro Ushio ,  Akira Ojima ,  Yoshiaki Kashino

IPC: B25F5/00 ,  H02K5/18 ,  H02K7/14 ,  H02K9/06 ,  H02K11/33

CPC classification number: B25F5/008 ,  H02K5/18 ,  H02K7/145 ,  H02K9/06 ,  H02K11/33 ,  H02K2211/03

Abstract: A working machine may include: a fan configured to generate an air flow inside a first space; a control unit disposed inside the first space; a partition wall separating the first space from a second space; a first aperture communicating the first space with the second space; and a rib extending from the partition wall and forming an air passage in which the air flow passes, wherein the air passage is positioned between the control unit and the rib. The control unit may include a case housing a circuit board. The control unit may include a first surface facing the rib. In a first direction perpendicular to the first surface, the rib and the first surface may at least partially overlap with each other. A distance between the rib and the first surface may be smaller than a thickness of the case in the first direction.

公开(公告)号：US09091239B2

公开(公告)日：2015-07-28

申请号：US13896688

申请日：2013-05-17

Applicant: MAKITA CORPORATION

Inventor： Takuya Sumi ,  Ryosuke Ito

IPC: F02M59/14 ,  F02M37/04 ,  F02M17/04 ,  F02M37/14 ,  F02M37/18 ,  F02M1/16 ,  F02M5/12 ,  F02M35/024

CPC classification number: F02M59/14 ,  F02M1/16 ,  F02M5/125 ,  F02M17/04 ,  F02M35/024 ,  F02M37/046 ,  F02M37/14 ,  F02M37/18

Abstract: An engine includes: a piston; a carburetor having a diaphragm fuel pump, the diaphragm fuel pump including a pump chamber configured to suck and discharge fuel and a diaphragm chamber to which a pressure to drive the pump chamber is applied; and a communicating passage configured to connect between the diaphragm chamber and a negative pressure part in which a negative pressure is created due to movement of the piston. A flowback prevention part is formed in the communicating passage to allow fluid to move only in on direction from the diaphragm chamber to the negative pressure part.

Abstract translation: 发动机包括：活塞; 具有隔膜燃料泵的化油器，所述隔膜燃料泵包括构造成吸入和排出燃料的泵室和施加驱动所述泵室的压力的隔膜室; 以及连通通道，其构造成在隔膜室和由于活塞的移动而产生负压的负压部分之间连接。 在连通通道中形成防回流部分，以使流体只能沿隔膜室向负压部分的方向移动。

公开(公告)号：USD959216S1

公开(公告)日：2022-08-02

申请号：US29725139

申请日：2020-02-21

Applicant: MAKITA CORPORATION

Designer： Kento Nakamura ,  Ryosuke Ito

公开(公告)号：US11723314B2

公开(公告)日：2023-08-15

申请号：US16932160

申请日：2020-07-17

Applicant: MAKITA CORPORATION

Inventor： Ryosuke Ito ,  Nami Ishikawa

IPC: A01G3/053 ,  A01D34/90 ,  A01G3/04

CPC classification number: A01G3/053 ,  A01D34/90 ,  A01G2003/0461

Abstract: An electric working machine may include a support rod, a head unit, a position fixing mechanism, and a resistance member. The support rod may extend in a front-rear direction and include an attachment portion located at a front end of the support rod. The head unit may include a front tool, a motor configured to drive the front tool, and a head housing supporting the front tool and coupled to the attachment portion rotatably about a rotation axis. The position fixing mechanism may be configured to fix a rotation position of the head unit with respect to the support rod. The resistance member may be interposed between the attachment portion and the head housing with respect to a direction perpendicular to the rotation axis. The resistance member may be configured to provide a resistance force against rotation of the head unit with respect to the support rod.