Power tool anti-kickback system with rotational rate sensor
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United States of America Patent
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Sep 9, 2014
Grant Date -
N/A
app pub date -
Aug 31, 2012
filing date -
Oct 20, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A control system is provided for use in a power tool. The control system includes: a rotational rate sensor having a resonating mass and a controller electrically connected to the rotational rate sensor. The rotational rate sensor detects lateral displacement of the resonating mass and generates a signal indicative of the detected lateral displacement, such that the lateral displacement is directly proportional to a rotational speed at which the power tool rotates about an axis of the rotary shaft. Based on the generated signal, the controller initiates a protective operation to avoid further undesirable rotation of the power tool. The controller may opt to reduce the torque applied to shaft to a non-zero value that enables the operator to regain control of the tool.
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