Detection system for power equipment
First Claim
Patent Images
1. A woodworking machine having a cutting tool, the machine comprising:
- a detection subsystem adapted to detect contact between a person and the cutting tool, and to distinguish that contact from contact between at least one other material and the cutting tool, where the detection subsystem imparts an electrical signal to the cutting tool, and where the detection subsystem distinguishes the contact between the person and the cutting tool from the contact between the other material and the cutting tool based on a predetermined frequency response of the electrical signal; and
a reaction subsystem adapted to cause a predetermined action to take place upon detection of the contact between the person and the cutting tool.
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Abstract
A machine is disclosed having a detection subsystem adapted to detect contact between a person and a specified portion of the machine, and to distinguish that contact from contact with other materials. The detection subsystem imparts an electrical signal to a specified portion of the machine, and distinguishes that contact based on a predetermined frequency response of the electrical signal. A reaction subsystem then causes a predetermined action to take place. The machine may be a power saw designed to minimize injury in the event a person accidentally contacts the blade.
66 Citations
20 Claims
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1. A woodworking machine having a cutting tool, the machine comprising:
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a detection subsystem adapted to detect contact between a person and the cutting tool, and to distinguish that contact from contact between at least one other material and the cutting tool, where the detection subsystem imparts an electrical signal to the cutting tool, and where the detection subsystem distinguishes the contact between the person and the cutting tool from the contact between the other material and the cutting tool based on a predetermined frequency response of the electrical signal; and a reaction subsystem adapted to cause a predetermined action to take place upon detection of the contact between the person and the cutting tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A woodworking machine having a cutting tool, the machine comprising:
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a detection subsystem adapted to detect an unsafe condition between a person and the cutting tool, where the detection subsystem includes electronics to generate an electrical signal and to monitor the electrical signal for a predetermined frequency response; and a reaction subsystem adapted to cause a predetermined action to take place upon detection of the unsafe condition. - View Dependent Claims (19)
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20. A woodworking machine having a cutting tool, the machine comprising:
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detection means for detecting an unsafe condition between a person and the cutting tool based on a frequency response of an electrical signal; and reaction means for mitigating the unsafe condition upon detection of the unsafe condition.
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Specification