07077039 is referenced by 194 patents and cites 386 patents.

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.

Title
Detection system for power equipment
Application Number
10/292607
Publication Number
7077039 (B2)
Application Date
November 12, 2002
Publication Date
July 18, 2006
Inventor
J David Fulmer
Tualatin
OR, US
Stephen F Gass
Wilsonville
OR, US
Assignee
SD3
OR, US
IPC
B26D 5/00
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