公开(公告)号：US12023748B2

公开(公告)日：2024-07-02

申请号：US17052459

申请日：2020-04-28

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Timothy R. Obermann ,  Patrick D. Gallagher ,  Jessie L Bernitt ,  Mitchell Carlson ,  Timothy J. Bartlett ,  Alex Huber ,  Travis J. Dubnicka ,  Daniel R. Ertl ,  Troy C. Thorson ,  Kevin Staszak ,  Austin Jin

IPC: B23D45/16 ,  B25F5/02 ,  B23D59/00 ,  B24B27/06 ,  H05F3/02

CPC classification number: B23D45/16 ,  B25F5/02 ,  B23D59/008 ,  B24B27/06 ,  H05F3/02

Abstract: A cut-off saw configured to remove material from a workpiece, the cut-off saw includes a motor, a blade, a drive assembly, a handle, and a coating. The blade is capable of removing material from the workpiece upon contact between the blade and the workpiece. The drive assembly is coupled to the motor and the blade and is configured to transmit torque from the motor to the blade. The handle is configured to be grasped by a user, and includes a surface and a first material having a first surface resistivity. The coating covers at least a portion of the handle. The coating is configured to distribute static electricity away from the surface. The coating is made of a second material having a second surface resistivity less than the first surface resistivity.

公开(公告)号：US20190255687A1

公开(公告)日：2019-08-22

申请号：US16278382

申请日：2019-02-18

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob P. Schneider ,  James A. Yaccarino ,  Daniel R. Ertl

IPC: B25B21/02 ,  B25D11/06 ,  B25D11/04

Abstract: An impact tool includes a housing, an electric motor supported in the housing, and a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece capable of developing at least 1,700 ft-lbs of fastening torque. The drive assembly includes an anvil rotatable about an axis and having a head adjacent a distal end of the anvil. The head has a minimum cross-sectional width of at least 1 inch in a plane oriented transverse to the axis. The drive assembly also includes a hammer that is both rotationally and axially movable relative to the anvil for imparting the consecutive rotational impacts upon the anvil, and a spring for biasing the hammer in an axial direction toward the anvil.

公开(公告)号：US20240334869A1

公开(公告)日：2024-10-10

申请号：US18293597

申请日：2022-08-10

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Daniel R. Ertl

IPC: A01D34/69 ,  A01D101/00 ,  B60L50/60

CPC classification number: A01D34/69 ,  A01D2101/00 ,  B60L50/60 ,  B60L2200/40

Abstract: A walk-behind lawnmower comprising one or more wheels, one or more cutting blades, a motor configured to rotate the one or more cutting blades, a sensor configured to sense an acceleration of the motor, and a controller coupled to the motor and the sensor. The controller is configured to receive, from the sensor, a signal indicative of the acceleration of the motor, determine, based on the signal, whether an amplitude of the acceleration of the motor is greater than or equal to an amplitude threshold, and increment, in response to the amplitude being greater than or equal to the amplitude threshold, a hopping counter. The controller is configured to determine whether the hopping counter is greater than or equal to a hopping threshold, and disable, in response to the hopping counter being greater than or equal to the hopping threshold, operation of the motor.

公开(公告)号：US20230049230A1

公开(公告)日：2023-02-16

申请号：US17884750

申请日：2022-08-10

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Tyler L. Graham ,  Joshua D. Widder ,  Daniel R. Ertl ,  Benjamin F. Shaske ,  Christopher Shawn Bullington ,  Anthony J. Buxton ,  John L. Whealon

IPC: A01D34/69 ,  A01D34/00 ,  A01D34/68 ,  A01D34/82

Abstract: A walk-behind lawnmower includes a mower deck, a plurality of wheels coupled to the mower deck, a drive motor configured to operate at a drive speed to drive at least one of the plurality of wheels, and a handle coupled to the mower deck. The handle includes a user interface having a variable speed control configured to be actuated an actuation percentage, and a maximum speed control including a setting corresponding to a maximum mower speed. The drive speed of the drive motor is determined using the actuation percentage of the variable speed control scaled by the setting of the maximum speed control.

公开(公告)号：US20220250216A1

公开(公告)日：2022-08-11

申请号：US17734691

申请日：2022-05-02

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob P. Schneider ,  James A. Yaccarino ,  Daniel R. Ertl

IPC: B25B21/02 ,  B25D11/06 ,  B25D11/04

Abstract: An impact tool includes a housing that includes a motor housing portion, a front housing portion coupled to the motor housing portion, and a D-shaped handle portion extending from the motor housing portion in a direction opposite the front housing portion. The impact tool includes an electric motor supported in the motor housing portion, a battery pack supported by the housing for providing power to the motor, and a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece capable of developing at least 1,700 ft-lbs of fastening torque.

公开(公告)号：US20190052149A1

公开(公告)日：2019-02-14

申请号：US16155488

申请日：2018-10-09

Applicant: Milwaukee Electric Tool Corporation

Inventor： Matthew J. Mergener ,  Daniel R. Ertl

IPC: H02K7/14 ,  H01L23/34 ,  H05K1/18 ,  H02K11/33

Abstract: A power tool and a printed circuit board assembly (“PCBA”) for the power tool. The PCBA includes, for example, a printed circuit board (“PCB”), a heat sink, a spacer between the PCB and the heat sink, and a gap pad. The PCB and the heat sink are fastened to one another via fasteners so the spacer absorbs excess forces torsional forces from torques applied to the fasteners. The gap pad is placed within an opening or recess of the spacer to contact one or more FETs on the PCB. In some embodiments, the PCBA includes a second heat sink or rigid member on the opposite side of the PCB than the spacer to further distribute excess torsional forces from torques applied to the fasteners.

公开(公告)号：US20250105643A1

公开(公告)日：2025-03-27

申请号：US18890987

申请日：2024-09-20

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Daniel R. Ertl ,  Patrick Gordon ,  Joel T. Townsan ,  Murray Ethan Hersh

IPC: H02J7/00

Abstract: A battery-pack-powered device includes an interface configured to receive a battery pack, a sensing circuit configured to detect a voltage of the battery pack, and an electronic controller. The electronic controller is configured to receive a first signal from the sensing circuit indicative of a no-load voltage of the battery pack, determine a threshold voltage based on the no-load voltage, generate a control signal to drive an electric motor at a first operating parameter in response to an activation of a trigger switch, receive a second signal from the sensing circuit, and update the control signal to drive the electric motor at a second operating parameter less than the first operating parameter in response to the second signal indicating that the output voltage is below the threshold voltage. The second signal is indicative of an output voltage of the battery pack during operation of the electric motor.

公开(公告)号：US20240364120A1

公开(公告)日：2024-10-31

申请号：US18691800

申请日：2022-09-23

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Peter J. Wawer ,  Donald J. Truettner ,  Daniel R. Ertl

IPC: H02J7/00 ,  B25F5/00

CPC classification number: H02J7/0013 ,  H02J7/0031 ,  H02J7/007 ,  B25F5/00 ,  H02J2207/20

Abstract: Embodiments described herein provide power management systems including a battery pack powered tool, one or more battery packs coupled to the battery pack powered tool, a first plurality of sub circuits including a switch and one or more first peripheral outputs, and a second plurality of sub circuits including a voltage regulator and one or more second peripheral outputs. The systems also include one or more control lines for enabling or disabling the first plurality of sub circuits and the second plurality of sub circuits.

公开(公告)号：US11695312B2

公开(公告)日：2023-07-04

申请号：US16121286

申请日：2018-09-04

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Daniel J. Brueck ,  Daniel R. Ertl

IPC: H02K11/40 ,  F04D25/08 ,  F04D25/06 ,  H02K7/14 ,  H02K9/06 ,  H02K7/08 ,  H02K7/00 ,  H05F3/02

CPC classification number: H02K11/40 ,  F04D25/0673 ,  F04D25/0693 ,  F04D25/08 ,  H02K7/145 ,  H02K9/06 ,  H02K7/003 ,  H02K7/086 ,  H05F3/02

Abstract: An electric tool, a blower and a method of discharging electrostatic charge in an electric tool. The tool may include a housing, a motor supported by the housing and powered by a power source, the motor including a rotor, a fan supported by the housing and driven by the motor to cause an air flow, and a wire electrically connected between the rotor and a terminal of the power source and operable to dissipate electrostatic discharge in the tool.

公开(公告)号：US10122315B2

公开(公告)日：2018-11-06

申请号：US15465902

申请日：2017-03-22

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Matthew J. Mergener ,  Daniel R. Ertl ,  Jay J. Rosenbecker

IPC: H02P29/024 ,  B25F5/00 ,  H02P6/17 ,  G01R19/165

Abstract: A power tool that includes a motor configured to drive a working element, a power supply that is coupled to the motor to provide power to the motor, a shunt circuit that is coupled to the power supply, and a controller. The shunt circuit includes a shunt switch and a shunt element and is configured to hold a voltage of the power supply below a high voltage threshold. The shunt switch is switchable between a conducting state, in which the shunt switch conducts current through the shunt element, and a non-conducting state, in which the shunt switch does not conduct current through the shunt element. The controller is coupled to the motor, the power supply, and the shunt circuit and is configured to determine the voltage of the power supply, and control the shunt switch based on the voltage from the power supply.