IP Library › Granted Patent US 9,969,014
Granted Patent B2
US 9,969,014 · App. 15/357,928 · Granted May 15, 2018

Power equipment with detection and reaction systems

Inventor: Stephen F. Gass (West Linn, OR)
Assignee: SawStop Holding LLC
B23D47/025B23D47/08B23D59/001B26D7/24B27B5/38B27B13/14B27G19/00B27G19/02B27G19/06F16P3/12F16P3/14F16P3/148Y10S83/01Y10T83/04Y10T83/081Y10T83/088Y10T83/089Y10T83/091Y10T83/141Y10T83/162Y10T83/175Y10T83/178Y10T83/541Y10T83/613Y10T83/7693Y10T83/7697Y10T83/7726Y10T83/7734Y10T83/7788Y10T83/85Y10T83/8773
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Quick Facts
Patent No.
US 9,969,014
App. No.
15/357,928
Granted
May 15, 2018
Kind
B2
Abstract

Woodworking machines and safety methods for use with those machines are disclosed. The machines include a detection system adapted to detect one or more dangerous conditions and a reaction system associated with the detection system. The reaction system can include an explosive to trigger the system, and also can be configured to retract a cutting tool at least partially away from a cutting region upon detection of a dangerous condition by the detection system.

Claims (5)

1. A table saw comprising:

a circular blade configured to cut a workpiece;

a detection circuit connected to the blade, where the detection circuit includes an oscillator that generates an oscillating signal, where the oscillating signal is imparted on the blade, where the detection circuit includes a controller that detects a change in the oscillating signal on the blade indicative of contact between a person and the blade, and where the detection circuit generates a detection signal when the change in the oscillating signal on the blade is detected;

a firing circuit connected to the detection circuit to receive the detection signal, where the firing circuit includes a capacitor, and where the firing circuit discharges current from the capacitor upon receiving the detection signal; and

an explosive or fusible member connected to the firing circuit to receive the current discharged from the capacitor and cause a specified action to mitigate possible injury from the contact.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 20, 2017
From: GASS, STEPHEN F.
To: SAWSTOP HOLDING LLC
Reel/Frame 043977/0490 →
Continuity (169)
Continuation 12806829 · Aug 20, 2010
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Division 09929426 · Aug 13, 2001
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Division 12154675 · May 23, 2008
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Continuation In Part 09676190 · Sep 29, 2000
Continuation 12313162 · Nov 17, 2008
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Division 11702330 · Feb 5, 2007
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Continuation In Part 10197975 · Jul 18, 2002
Continuation In Part 09676190 · Sep 29, 2000
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Continuation In Part 10923290 · Aug 20, 2004
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Provisional Application 60667485 · Mar 31, 2005
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Provisional Application 60496568 · Aug 20, 2003
Provisional Application 60533598 · Dec 31, 2003
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Provisional Application 60312141 · Aug 13, 2001
Provisional Application 60308492 · Jul 27, 2001
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