公开(公告)号：US20250129794A1

公开(公告)日：2025-04-24

申请号：US18910083

申请日：2024-10-09

Applicant: Milwaukee Electric Tool Corporation

Inventor： Adam F. Czerwonka ,  Sourav Sen ,  Nathaniel A. Herrera

IPC: F04D29/66 ,  F04D19/00 ,  F04D29/52

Abstract: Blower/vacuum tools having reduced fan blade noise are provided. A blower/vacuum tool includes a main body extending between a first end and a second end defining an airflow conduit therethrough; and a fan assembly. The fan assembly includes an axial fan having a number of fan blades (nb), and a motor rotatably connected to the fan. In some embodiments, when ng is in a range from 17-45, the axial fan has a Blade Solidity in a range from 0.0464nb≤Blade Solidity≤0.089nb calculated by the equation Blade Solidity=c/s where c is the length of the chord line of the fan blades, s=2πrm/nb, and rm is the mean radius of the fan blades. In some embodiments, when the motor operates at a speed of between 21000-38000 rotations per minute (RPM), blade pass frequency (BPF) of the fan assembly as defined by the equation B ⁢ P ⁢ F = ( R ⁢ P ⁢ M 6 ⁢ 0 ) * ( # ⁢ of ⁢ blades )  is greater than 6 KHz.

公开(公告)号：US20240308053A1

公开(公告)日：2024-09-19

申请号：US18681200

申请日：2022-08-17

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Ryan E. McKernan ,  Casey D. Garces ,  Adam F. Czerwonka ,  Nathaniel A. Herrera ,  Shane McCue ,  Shu Rui Liao ,  Wei Xiao ,  Zhong Xiang Lin

IPC: B25G3/04 ,  A01B1/06 ,  A01G3/053

CPC classification number: B25G3/04 ,  A01B1/065 ,  A01G3/053

Abstract: A cultivator tool includes a power head having a handle and a user interface. A motor is positioned within the power head and is configured to rotate a drive shaft about a drive axis. The cultivator further includes an attachment stem removably coupled to the power head at a first end and removably supporting a tool attachment unit at an opposite second end. A cover is receivable on the attachment stem between the tool attachment unit and the power head to cover a cutter rotatably supported on the tool attachment unit. The cover includes an aperture configured to receive a projection extending from the stem to limit rotation and sliding of the cover relative the tool attachment unit.

公开(公告)号：US20240280110A1

公开(公告)日：2024-08-22

申请号：US18572095

申请日：2022-10-10

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Nathaniel A. Herrera ,  Beth E. Cholst ,  Shannon C. Bartlett ,  John L. Whealon

IPC: F04D25/08 ,  F04D29/32 ,  F04D29/34 ,  F04D29/38

CPC classification number: F04D25/08 ,  F04D29/32 ,  F04D29/34 ,  F04D29/38

Abstract: A fan includes a hub and a plurality of blades extending radially outwardly from the hub and spaced circumferentially about the hub. The plurality of blades includes a reference blade, a first blade, and a second blade. The reference blade is disposed after the first blade in a circumferential direction about the hub. The second blade is disposed after the reference blade in the circumferential direction. The first blade is circumferentially spaced a first distance from the reference blade. The second blade is circumferentially spaced a second distance from the reference blade. The first distance is greater than the second distance.

公开(公告)号：US20230296102A1

公开(公告)日：2023-09-21

申请号：US18186455

申请日：2023-03-20

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Nathaniel A. Herrera ,  Adam F. Czerwonka ,  Marcus T. Jenkins ,  Shannon C. Bartlett ,  John L. Whealon ,  Drake J. Schlosser

IPC: F04D25/06 ,  F04D19/00 ,  F04D29/70

CPC classification number: F04D25/0673 ,  F04D19/002 ,  F04D29/703 ,  F04D29/441

Abstract: An axial blower includes a fan, housing, and intake grate. The fan has a rotational axis. The housing surrounds the fan. The housing includes an inlet, fluid intake volume, outlet, and battery interface. The inlet is disposed at a position along the rotational axis upstream of the fan. The fluid intake volume is upstream of the inlet. The outlet is disposed at a position along the rotational axis downstream of the fan. The distal projection extends away from the inlet in an upstream direction. The battery interface is coupled to the distal projection, upstream of the inlet, and suspends a battery pack in the fluid intake volume. The intake grate is positioned between the fluid intake volume and the inlet. The intake grate permits fluid flow between the fluid intake volume and the inlet. The fluid intake volume is unobstructed between the battery interface and the intake grate.