POWER TOOL SENSING A MULTI-POLE MAGNET JUNCTION
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United States of America Patent
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Issued Date -
Jan 11, 2024
app pub date -
Jul 7, 2023
filing date -
Jul 8, 2022
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Abstract
A powered fastener driver having a motor, a biasing member configured to store a force for driving a fastener, a lifter configured to release the force, a piston configured to be urged by the force towards a bottom-dead-center position to drive the fastener into a workpiece, and a magnet coupled to the lifter for rotation therewith. The magnet is formed as a single piece including a first pair of poles having a first north pole face and a first south pole face, and a second pair of poles including a second north pole face and a second south pole face. The first north pole face is adjacent the second south pole face, and a pole junction is defined between the first and second pairs of poles. A sensor is configured to detect the pole junction. A controller is configured to control the motor based on detection of the pole junction.
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