POWER TOOL WITH EXCHANGEABLE REDUCTION GEARING UNIT
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United States of America Patent
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N/A
Issued Date -
Feb 11, 2010
app pub date -
Nov 8, 2007
filing date -
Nov 8, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A power tool includes a power unit with a rotation motor, and a reduction gearing, wherein the reduction gearing includes a set of interchangeable gearing units attachable one at a time to the power unit and having different operational characteristics including different total gear ratio and torque capacity. Each gearing unit has an electronic identification device programmed with data specific for each gearing unit, such as total gear ratio, torque range, and relating to compatibility of the gearing unit with a certain power unit. The power unit includes an electronic operation control unit programmed with a number of different operation parameter sets each intended for a specific one of the gearing units, and a circuit for communicating with a gearing unit attached to the power unit to determine whether there is compatibility and which parameter set is applicable.
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