公开(公告)号：US11672396B2

公开(公告)日：2023-06-13

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 ,  A47L9/32

CPC classification number: A47L9/22 ,  A47L5/365 ,  A47L9/0081 ,  A47L9/2857 ,  A47L9/2884 ,  A47L9/327

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：US11841033B2

公开(公告)日：2023-12-12

申请号：US17583354

申请日：2022-01-25

Applicant: MAKITA CORPORATION

Inventor： Hideaki Takano

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

CPC classification number: F04D29/661 ,  A47L5/365 ,  A47L9/102 ,  F04D25/06 ,  G10K11/1785 ,  G10K2210/3028

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：US11491433B2

公开(公告)日：2022-11-08

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：US20140147252A1

公开(公告)日：2014-05-29

申请号：US14131276

申请日：2012-06-19

Applicant: MAKITA CORPORATION

Inventor： Hideaki Takano

IPC: F04D29/28 ,  F04D29/66

CPC classification number: F04D29/668 ,  B25F5/008 ,  F04D17/165 ,  F04D25/0673 ,  F04D29/2216 ,  F04D29/281 ,  F04D29/30 ,  F04D29/4253 ,  F04D29/444 ,  F04D29/666

Abstract: A power tool having a built-in fan, the fan including a plurality of blades at uneven pitches. The fan includes a centrifugal fan which blows out air in all radial directions. The fan is provided with means for correcting unstable outflow which may be caused by the uneven pitches between the blades. The blades have unevenly configured inducers for correcting unstable outflow.

Abstract translation: 一种具有内置风扇的电动工具，所述风扇包括多个不均匀间距的叶片。 风扇包括在所有径向吹出空气的离心式风扇。 该风扇设置有用于校正可能由叶片之间的不均匀间距引起的不稳定流出的装置。 叶片具有不均匀配置的诱导器，用于校正不稳定的流出。

公开(公告)号：US09101094B2

公开(公告)日：2015-08-11

申请号：US13899837

申请日：2013-05-22

Applicant: MAKITA CORPORATION

Inventor： Kazuya Kato ,  Hideaki Takano ,  Yuki Koide

IPC: A01G3/053 ,  A01G3/06 ,  A01G3/04

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。