US 11,865,631 B2
Actuators for power tool safety systems
Stephen F Gass, West Linn, OR (US)
Assigned to SawStop Holding LLC, Tualatin, OR (US)
Filed by SawStop Holding LLC, Tualatin, OR (US)
Filed on Apr. 12, 2021, as Appl. No. 17/228,008.
Application 17/228,008 is a continuation of application No. 16/544,608, filed on Aug. 19, 2019, granted, now 10,981,238.
Application 16/544,608 is a continuation of application No. 13/393,919, filed on Mar. 2, 2012, granted, now 10,384,281, issued on Aug. 20, 2019.
Application 13/393,919 is a continuation of application No. PCT/US2010/002634, filed on Sep. 29, 2010.
Claims priority of provisional application 61/464,940, filed on Mar. 11, 2011.
Claims priority of provisional application 61/278,111, filed on Oct. 2, 2009.
Prior Publication US 2021/0229197 A1, Jul. 29, 2021
Int. Cl. B23D 47/10 (2006.01); B23D 59/00 (2006.01); B27G 19/02 (2006.01); B27B 5/38 (2006.01); F15B 15/19 (2006.01)
CPC B23D 47/10 (2013.01) [B23D 59/001 (2013.01); B27G 19/02 (2013.01); F15B 15/19 (2013.01); B27B 5/38 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A power tool comprising:
a blade for cutting workpieces;
a motor configured to drive the blade;
a structure supporting the blade and configured to allow the blade to retract; and
at least one electromagnet to trigger a retraction of the blade, and
a circuit that controls the at least one electromagnet, where the circuit is configured to supply current to the at least one electromagnet in a first direction to create a magnetic field and in a second direction to reverse the magnetic field.