US 11,940,095 B2
Detection systems for power tools with active injury mitigation technology
Stephen F. Gass, West Linn, OR (US); John P. Nenadic, Camas, WA (US); and Louis R. Slamka, Vancouver, WA (US)
Assigned to SawStop Holding LLC, Tualatin, OR (US)
Filed by SawStop Holding LLC, Tualatin, OR (US)
Filed on Aug. 20, 2021, as Appl. No. 17/407,433.
Application 17/407,433 is a continuation of application No. 16/304,539, granted, now 11,098,849, previously published as PCT/US2017/034566, filed on May 25, 2017.
Claims priority of provisional application 62/343,451, filed on May 31, 2016.
Prior Publication US 2022/0042648 A1, Feb. 10, 2022
Int. Cl. F16P 3/14 (2006.01); B26D 7/22 (2006.01); B32B 9/00 (2006.01); H01R 39/64 (2006.01); B23D 47/12 (2006.01); B27G 19/00 (2006.01); H01R 39/20 (2006.01)
CPC F16P 3/148 (2013.01) [B26D 7/22 (2013.01); B32B 9/00 (2013.01); H01R 39/64 (2013.01); B23D 47/12 (2013.01); B27G 19/00 (2013.01); H01R 39/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A power tool comprising:
a rotatable arbor;
a blade mounted on the arbor;
a motor to spin the arbor and blade, where the motor has a motor shaft;
a detection system to detect when a person contacts the spinning blade;
a reaction system triggerable to perform an action to mitigate injury upon detection of the contact;
a first conductive coupling establishing an electrical connection between the detection system and the blade; and
a second conductive coupling establishing an electrical connection between the motor shaft and an electrical ground.