POWER TOOL WITH TELESCOPIC OUTPUT SHAFT
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United States of America Patent
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Issued Date -
Dec 21, 2017
app pub date -
Aug 11, 2015
filing date -
Dec 10, 2014
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Abstract
A torque delivering power tool with a telescopically arranged output shaft includes a motor, a housing, an input shaft and an output shaft. A sensor is arranged to monitor an axial position of the output shaft with respect to the input shaft. The output shaft is telescopically arranged with respect to the input shaft between a fully extended position (PE) and a fully compressed position (PC). A resilient member having a known resilience in function of an extension is arranged to urge the output shaft towards the fully extended position (PE), such that the extension of the output shaft continuously reflects a compression force acting between the output shaft and the input shaft. An indication unit is arranged to indicate an axial compression force acting between the output shaft and the input shaft based on a level of extension between the shafts.
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