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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
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.
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公开(公告)号：US11946484B2
公开(公告)日：2024-04-02
申请号：US17374689
申请日：2021-07-13
Applicant: MAKITA CORPORATION
Inventor： Akira Ojima , Fumitoshi Numata
CPC classification number: F04D29/30 , F04D25/0606 , F04D25/0673 , F04D25/086 , F04D29/281 , F04D29/4226
Abstract: A blower includes a motor, a plurality of fans coaxially arranged in multiple stages, a housing having an inlet opening and a discharge opening, and a battery mounting part to which a battery is removably mountable. A rotational speed of the motor is within a range of 50,000 rpm to 120,000 rpm. A diameter of each of the fans is within a range of 30 mm to 70 mm. An area of the discharge opening is within a range of not less than an area of a circle having a diameter of 2.5 mm and not more than an area of a circle having a diameter of 10 mm. A blowing force of air discharged through the discharge opening is within a range of 1 N to 3 N.
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