Wrench equipped with a precise torque-measuring device
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United States of America Patent
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Feb 12, 2013
Grant Date -
Mar 1, 2012
app pub date -
Aug 29, 2010
filing date -
Aug 29, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A wrench includes a shank including a slot defined therein longitudinally, a handle attached to an end of the shank, a head, a torque assembly for connecting the head to another end of the shank, a torque-setting device and a torque-measuring device. The torque-setting device includes a knob inserted in the handle and a pin movable in and along the slot as the knob is spun. The torque-measuring device includes a measurement sleeve and a collar. The measurement sleeve is rotationally located around the shank and includes a helical groove defined in an internal side and a scale provided on an external side. A portion of the pin is movably inserted in the helical groove so that the measurement sleeve is spun as the pin is moved in and along the slot. The collar is located around the shank and includes a window through which the scale is observable.
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