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Detection system for power equipment

  • US 7,900,541 B2
  • Filed: 08/29/2008
  • Issued: 03/08/2011
  • Est. Priority Date: 11/13/2001
  • Status: Expired due to Fees
First Claim
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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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