Power tool anti-kickback system with rotational rate sensor

Details Power tool anti-kickback system with rotational rate sensor Power tool anti-kickback system with rotational rate sensor

2005-10-19

2008-08-12

Nash, Brian D. (Department: 3721)

Tool driving or impacting

Processes

C173S176000, C173S179000

Reexamination Certificate

active

07410006

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 control scheme employed by the power tool may initiate different protective operations for different tool conditions.

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