Black Decker Inc.

Eric Louis Kunz

Brian E Friedman

Wing Lin

Tyler Petrus

BhanuPrakash Villuri

Peter Hague Wadeson

Erik A Ekstrom

Sefa Hazir

An electronic module for a powered apparatus includes a circuit board comprising conductive pads coupled to a power source and a sense portion including a first output pad and a second output pad; and a variable-speed actuator assembly including an actuator and a conductive wiper moveable in sliding contact with the circuit board. The wiper includes a first leg arranged to slidably engage the sense portion and a second leg arranged to slidably engage at least one of the conductive pads. The first output pad and the second output pad are longitudinally aligned with the conductive pads. The first output pad outputs a first voltage signal indicative of an ON state of the powered apparatus and the second output pad and the second output pad outputs a second voltage signal indicative of a desired operational speed of the powered apparatus.

Variable-speed switch module having a discrete on/off detection pad

An impact power tool includes a housing, a motor, a controller, an impact mechanism configured to be driven by the motor, and an output spindle configured to receive rotational impacts from the impact mechanism to rotate the output spindle. The controller is configured to detect a first impact of the rotational impacts or to detect when the motor speed drops below a speed threshold value. The controller is configured to control the motor to have a first non-zero target rotational speed using closed loop control for a predetermined time period after the first impact is detected or when the motor speed dropping below the speed threshold value is detected. The controller is configured to control the motor to have a second non-zero target rotational speed using the closed loop control after the predetermined time period. The first non-zero target rotational speed is less than the second non-zero target rotational speed.

Impact tools and control modes

A power tool includes a housing, a brushless motor received in the housing, a power switch coupled to the housing and actuatable by a user, a controller configured to control power delivery to the motor in response to actuation of the power switch, and an output spindle configured to rotate when the motor is energized. The controller is configured to maintain an amount of current delivered to the motor to be less than or equal to a current limit by turning off or reducing power to the motor for a time period if the current exceeds the current limit and then restarting power delivery to the motor. The time period is greater than the duration of one full current cycle.

An impact power tool includes a housing, a motor, a controller, an output member configured to be rotated when the motor is energized, and an impact mechanism configured to rotationally drive the output member. The impact mechanism is configured to selectively apply rotational impacts to the output member when a torque on the output member exceeds a torque threshold. The controller is configured to control the motor during a first phase of operation with open loop control and a baseline conduction band and advance angle setting when a sensed tool operation parameter is one of above or below a threshold value. The controller is configured to control the motor during a second phase of operation with closed speed loop control and an increased conduction band and advance angle setting when the sensed tool operation parameter is the other of above or below the threshold value.

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Shrewsbury, PA, United States of America

Eric Louis Kunz