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公开(公告)号：US12023748B2
公开(公告)日：2024-07-02
申请号：US17052459
申请日：2020-04-28
发明人： 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
CPC分类号： B23D45/16 , B25F5/02 , B23D59/008 , B24B27/06 , H05F3/02
摘要： 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.
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公开(公告)号：US20190255687A1
公开(公告)日：2019-08-22
申请号：US16278382
申请日：2019-02-18
摘要： 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.
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公开(公告)号：US20240334869A1
公开(公告)日：2024-10-10
申请号：US18293597
申请日：2022-08-10
发明人： Daniel R. Ertl
IPC分类号： A01D34/69 , A01D101/00 , B60L50/60
CPC分类号： A01D34/69 , A01D2101/00 , B60L50/60 , B60L2200/40
摘要： 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.
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公开(公告)号：US20230049230A1
公开(公告)日：2023-02-16
申请号：US17884750
申请日：2022-08-10
发明人： Tyler L. Graham , Joshua D. Widder , Daniel R. Ertl , Benjamin F. Shaske , Christopher Shawn Bullington , Anthony J. Buxton , John L. Whealon
摘要： 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.
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公开(公告)号：US20220250216A1
公开(公告)日：2022-08-11
申请号：US17734691
申请日：2022-05-02
摘要： 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.
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公开(公告)号：US20190052149A1
公开(公告)日：2019-02-14
申请号：US16155488
申请日：2018-10-09
摘要： 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.
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公开(公告)号：US20240364120A1
公开(公告)日：2024-10-31
申请号：US18691800
申请日：2022-09-23
CPC分类号： H02J7/0013 , H02J7/0031 , H02J7/007 , B25F5/00 , H02J2207/20
摘要： 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.
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公开(公告)号：US11695312B2
公开(公告)日：2023-07-04
申请号：US16121286
申请日：2018-09-04
发明人： Daniel J. Brueck , Daniel R. Ertl
CPC分类号： H02K11/40 , F04D25/0673 , F04D25/0693 , F04D25/08 , H02K7/145 , H02K9/06 , H02K7/003 , H02K7/086 , H05F3/02
摘要： 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.
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公开(公告)号：US10122315B2
公开(公告)日：2018-11-06
申请号：US15465902
申请日：2017-03-22
IPC分类号： H02P29/024 , B25F5/00 , H02P6/17 , G01R19/165
摘要： 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.
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公开(公告)号：US20170013740A1
公开(公告)日：2017-01-12
申请号：US15203895
申请日：2016-07-07
CPC分类号： H02K7/145 , H01L23/34 , H02K9/22 , H02K11/33 , H05K1/0203 , H05K1/0271 , H05K1/181 , H05K2201/09 , H05K2201/10166 , H05K2201/2036
摘要： 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.
摘要翻译： 用于电动工具的电动工具和印刷电路板组件（“PCBA”）。 PCBA包括例如印刷电路板（“PCB”），散热器，PCB和散热器之间的间隔物，以及间隙垫。 PCB和散热器通过紧固件彼此紧固，因此间隔件吸收过多的扭矩，从扭矩施加到紧固件上。 间隙垫放置在间隔件的开口或凹槽内以接触PCB上的一个或多个FET。 在一些实施例中，PCBA在PCB的相对侧上包括第二散热器或刚性构件，而不是间隔件，以进一步将过量的扭转力分配给施加到紧固件上的扭矩。
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