Apparatus and method for detecting dangerous conditions in power equipment
First Claim
Patent Images
1. A woodworking machine comprising:
- a motor;
an electrically isolated arbor configured to be driven by the motor;
a cutting tool coupled to the arbor;
an excitation system adapted to generate an electrical signal;
a capacitive coupling adapted to capacitively couple the excitation system to the arbor to transfer at least a portion of the electrical signal to the cutting tool, where the capacitive coupling includes a conductive plate substantially encircling the arbor; and
an insulator substantially encircling the conductive plate.
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Accused Products
Abstract
Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. The machines also include a reaction system configured to cause one or more predetermined actions to take place upon detection of contact between a person and the cutting tool by the contact detection system.
39 Citations
9 Claims
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1. A woodworking machine comprising:
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a motor; an electrically isolated arbor configured to be driven by the motor; a cutting tool coupled to the arbor; an excitation system adapted to generate an electrical signal; a capacitive coupling adapted to capacitively couple the excitation system to the arbor to transfer at least a portion of the electrical signal to the cutting tool, where the capacitive coupling includes a conductive plate substantially encircling the arbor; and an insulator substantially encircling the conductive plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification