公开(公告)号：US20240032748A1

公开(公告)日：2024-02-01

申请号：US18346418

申请日：2023-07-03

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: A47L9/02 ,  A47L5/24

CPC classification number: A47L9/02 ,  A47L5/24

Abstract: A nozzle includes: a main body having a lower surface that faces a cleaning target surface; a groove provided on the lower surface and recessed upward from the lower surface; and a suction port provided inside the groove and facing the cleaning target surface. The groove includes: a first groove; and a second groove at least a part of which is provided in the rear of the first groove. A depth H1 of the first groove is deeper than a depth H2 of the second groove.

公开(公告)号：US20220235798A1

公开(公告)日：2022-07-28

申请号：US17583354

申请日：2022-01-25

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: F04D29/66 ,  G10K11/178 ,  F04D25/06 ,  A47L9/10 ,  A47L5/36

Abstract: An electric powered work machine according to one aspect of the present disclosure includes a first and a second digital filters, a control sound source, an error sensor, and a characteristics adjustor. The first digital filter includes a series of taps and generates a control signal. The control sound source produces an artificial noise in accordance with the control signal. The error sensor converts a synthesized sound of the artificial noise and a target noise at a canceling location to an error signal. The second digital filter includes N taps and generates a filtered reference signal. The characteristics adjustor uses the error signal and the filtered reference signal to adjust a coefficient of each tap of M taps in the series of taps. Each of M and N is a positive integer satisfying M

公开(公告)号：US20230114011A1

公开(公告)日：2023-04-13

申请号：US17950207

申请日：2022-09-22

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: A47L9/00 ,  G10K11/178

Abstract: The work machine includes a path leading into a housing from an opening. The path is provided to control an airflow generated by motion of a machine. The work machine includes a microphone. The microphone is configured to collect sound in the housing, including operating noise generated in the housing by the motion of the machine. The work machine further includes a structure that defines a receiving space for the microphone along the path through which the operating noise propagates outside the housing. The structure includes an open structure that connects the receiving space with the path and faces downstream in the path. The structure surrounds the receiving space upstream of the open structure in the path.

公开(公告)号：US20130318799A1

公开(公告)日：2013-12-05

申请号：US13899837

申请日：2013-05-22

Applicant: MAKITA CORPORATION

Inventor： Kazuya KATO ,  Hideaki TAKANO ,  Yuki KOIDE

IPC: A01G3/053

CPC classification number: A01G3/053 ,  A01G3/067 ,  A01G2003/0461

Abstract: An electrically powered garden tool includes an electric motor mounted upright within an outer shell housing, a pair of relatively reciprocating shear blades assembled to be driven by operation of the motor through a crank mechanism provided within a lower portion of the outer shell housing, and a cooling fan assembled to be driven by operation of the motor for introducing outside air into an upper portion of the outer shell housing to exhaust the introduced air from a lower portion of the outer shell housing. In the garden tool, a downward exhaust opening is formed within a lower end peripheral wall of the outer shell housing enclosing the crank mechanism such that the air spouted by rotation of the cooling fan blows out downward from the downward exhaust opening to restrain the occurrence of blowing noise of the air.

Abstract translation: 电动花园工具包括直立安装在外壳壳体内的电动马达，一对相对往复运动的剪切叶片，其组装成通过设置在外壳壳体的下部内的曲柄机构操作马达而驱动， 冷却风扇组装成通过马达的操作来驱动，以将外部空气引入外壳壳体的上部，以从外壳壳体的下部排出引入的空气。 在花园工具中，在包围曲柄机构的外壳壳体的下端周壁形成向下的排气口，使得通过冷却风扇的旋转而喷出的空气从向下的排气口向下吹出，从而抑制 吹空气的声音。

公开(公告)号：US20210121031A1

公开(公告)日：2021-04-29

申请号：US17022668

申请日：2020-09-16

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: A47L9/22 ,  A47L5/36 ,  A47L9/28 ,  A47L9/00

Abstract: A dust extractor (1) includes a motor (30) and a blower fan (40), which is disposed downward of the motor and is connected to the motor. The dust extractor further includes a flexible (pliable) support member (50; 500), which has a lower-end portion (52) connected to the motor and suspends the motor.

公开(公告)号：US20230137143A1

公开(公告)日：2023-05-04

申请号：US17969219

申请日：2022-10-19

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO ,  Hirofumi MIYAZATO

IPC: A47L9/00 ,  G10K11/178

Abstract: A work machine includes a housing. The housing at least partly houses a machine. The housing has an opening. The work machine includes a path leading into the housing from the opening. The work machine includes a controller and a speaker. The controller is configured to cause a speaker to output a control sound for reducing operating noise. The operating noise is generated in the housing by motion of the machine and propagates in the path from a source of the operating noise to the opening. The speaker is arranged so that the control sound propagates in the path with its wavefront parallel to a wavefront of the operating noise that propagates in the path.

公开(公告)号：US20230121653A1

公开(公告)日：2023-04-20

申请号：US17956080

申请日：2022-09-29

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: A47L9/00 ,  G10K11/178

Abstract: A work machine includes microphones inside the housing. The microphones are configured to collect sound inside the housing, and output sound signals that are electrical signals corresponding to the collected sound. The sound includes an operating noise generated inside the housing due to motion of a machine. The microphones are arranged at different locations inside the housing. The work machine is configured to execute a process related to the operating noise based on the sound signals from the microphones.

公开(公告)号：US20200282353A1

公开(公告)日：2020-09-10

申请号：US16806153

申请日：2020-03-02

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO ,  Makoto HOTTA ,  Takayuki TAHARA

IPC: B01D46/42 ,  B01D46/02

Abstract: A backpack dust collector includes a housing, a slit portion, and a noise-absorbing member. The housing includes a suction port, a dust collecting chamber, a motor chamber, and an exhaust port. The dust collecting chamber is connected to the suction port and configured to accommodate a dust collecting bag. The motor chamber is connected to the dust collecting chamber and accommodates a fan and a motor. Through the exhaust port, air from the motor chamber is discharged. The slit portion is disposed in a flow path between the motor chamber and the exhaust port and includes at least one slit-shaped vent through which air from the motor chamber passes. The noise-absorbing member is disposed in at least part of a flow path between the vent and the exhaust port.

公开(公告)号：US20190226498A1

公开(公告)日：2019-07-25

申请号：US16253571

申请日：2019-01-22

Applicant: MAKITA CORPORATION

Inventor： Hideaki TAKANO

IPC: F04D29/66

Abstract: A blower machine may include a blower unit configured to blow air; and an air passage pipe connected to an air duct of the blower unit. The air passage pipe may include an elbow pipe arranged on a proximal end side of the air passage pipe which is connected to the air duct; and a straight pipe extending straight and arranged on a distal end side of the air passage pipe than the elbow pipe. A first silencer pipe portion may be arranged at a proximal end portion of the straight pipe which is arranged on the distal end side of the air passage pipe than the elbow pipe, and the first silencer pipe portion may be provided with a sound absorbing material on an inner surface of the first silencer pipe.

公开(公告)号：US20150377253A1

公开(公告)日：2015-12-31

申请号：US14753270

申请日：2015-06-29

Applicant: MAKITA CORPORATION

Inventor： Yoshinori SHIBATA ,  Hideaki TAKANO

IPC: F04D29/58 ,  F04D29/66 ,  F04D29/28 ,  F04D29/42 ,  F04D17/10 ,  F04D25/02

Abstract: A power-operated air blowing work apparatus comprises: a volute casing including a centrifugal fan installed therein and having a front wall formed with an air intake aperture for sucking air from an atmosphere into the volute casing by the centrifugal fan; an engine mounted to the volute casing in a rear side of the volute casing and connected to the centrifugal fan for rotating the centrifugal fan; an engine casing covering the engine from behind the engine in the rear side of the volute casing, and an air suction passage communicating from inside the engine casing toward inside the front wall of the volute casing for drawing air in the engine casing toward inside the front wall of the volute casing.

Abstract translation: 一种动力式吹风加工装置，其特征在于，包括：蜗壳，其具有安装在其中的离心风扇，具有前壁，所述前壁形成有用于通过所述离心式风扇从大气吸入所述蜗壳的空气进气口; 发动机安装在涡壳壳体的蜗壳的后侧，并与离心风扇连接，用于旋转离心式风扇; 在涡壳壳体的后侧从发动机后方覆盖发动机的发动机壳体，以及从发动机壳体内部朝向涡壳壳体的前壁内侧的空气吸入通路，用于将发动机壳体内的空气向内侧吸引 蜗壳的墙壁。