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Detection system for power equipment

  • US 20030090224A1
  • Filed: 11/12/2002
  • Published: 05/15/2003
  • Est. Priority Date: 11/13/2001
  • Status: Active Grant
First Claim
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1. A machine having an operative structure configured to perform a task, where the operative structure includes a cutting tool, the machine comprising:

  • a detection subsystem adapted to detect contact between a person and a specified portion of the operative structure, and to distinguish that contact from contact between at least one other material and the specified portion of the operative structure, where the detection subsystem imparts an electrical signal to the specified portion, and where the detection subsystem distinguishes contact between the person and the specified portion from contact between the other material and the specified portion 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 specified portion.

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