Safety mechanisms for power tools
First Claim
Patent Images
1. A table saw comprising:
- a cutting surface;
a motor-driven, rotatable blade for cutting a workpiece on the cutting surface, wherein a portion of the blade is extendable above the cutting surface;
detection means for detecting a dangerous condition relative to the blade;
reaction means in communication with the detection means for taking a reaction in response to detection of the dangerous condition by the detection system; and
a blade-spin detection system, different from the detection means and the reaction means, for detecting whether the blade is rotating based on energy from the blade, wherein the blade-spin detection system is in communication with the reaction means and provides an output to arm the reaction means when the blade-spin detection system detects that the blade is spinning so that the reaction means is armed to take the response when triggered by the detection means.
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Abstract
Various safety systems for power tools, and in particular table saws, include detection systems for detecting a dangerous condition relative to a blade of the power tool, and reaction systems for taking mitigation action in response to detection of a dangerous condition. The safety system may detect, prevent, and/or mitigate a dangerous condition associated with the power tool.
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Citations
30 Claims
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1. A table saw comprising:
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a cutting surface; a motor-driven, rotatable blade for cutting a workpiece on the cutting surface, wherein a portion of the blade is extendable above the cutting surface; detection means for detecting a dangerous condition relative to the blade; reaction means in communication with the detection means for taking a reaction in response to detection of the dangerous condition by the detection system; and a blade-spin detection system, different from the detection means and the reaction means, for detecting whether the blade is rotating based on energy from the blade, wherein the blade-spin detection system is in communication with the reaction means and provides an output to arm the reaction means when the blade-spin detection system detects that the blade is spinning so that the reaction means is armed to take the response when triggered by the detection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification