Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
David C. Shafer0
Fred J. Heinzmann0
Date of Patent
September 9, 2008
0Patent Application Number
114815390
Date Filed
July 6, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A power cutting tool having a movable blade, such as a table saw, comprising a radar sensing system for movement of an object in a region near the blade is disclosed. The radar sensing system emits a radio frequency wave and receives wave energy reflected by the object. The system measures the Doppler shift of the received wave energy to detect the presence of a fast moving object in a zone near the blade. When such a condition is detected, a reaction system can be activated to mitigate the condition.
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