US 11,750,069 B2
Line conditioning accessory and protective circuit for power tool
Erik A. Ekstrom, York, PA (US); Shailesh P. Waikar, Perry Hall, MD (US); Joseph B. Narbut, Parkville, MD (US); Alexandros T. Theos, Bel Air, MD (US); Daniel F. Nace, Towson, MD (US); and Zachary S. Olmsted, Vienna, VA (US)
Assigned to Black & Decker Inc., New Britain, CT (US)
Filed by Black & Decker Inc., New Britain, CT (US)
Filed on Sep. 14, 2021, as Appl. No. 17/474,474.
Claims priority of provisional application 63/079,142, filed on Sep. 16, 2020.
Prior Publication US 2022/0085699 A1, Mar. 17, 2022
Int. Cl. H02K 11/27 (2016.01); H02K 5/04 (2006.01); H02K 7/14 (2006.01); H02K 11/04 (2016.01); H02P 27/06 (2006.01); H02M 1/36 (2007.01); H02M 7/06 (2006.01); H02M 5/458 (2006.01); H02M 1/32 (2007.01); H02M 1/42 (2007.01); H02M 7/00 (2006.01)
CPC H02K 11/27 (2016.01) [H02K 5/04 (2013.01); H02K 7/14 (2013.01); H02K 11/04 (2013.01); H02M 1/36 (2013.01); H02M 5/458 (2013.01); H02M 7/062 (2013.01); H02P 27/06 (2013.01); H02M 1/32 (2013.01); H02M 1/4266 (2013.01); H02M 7/003 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power adaptor comprising:
a housing defining a longitudinal axis formed between a first axial end and a second axial end, the housing receiving a first power cord couplable to a power source through the first axial end thereof and a second power cord couplable to a load through the second axial end thereof;
a circuit board mounted within the housing between the first axial end and the second axial end;
a protective capacitor mounted on the circuit board;
a resistor mounted on the circuit board and electrically coupled in parallel to the protective capacitor;
a first set of terminals mounted on a first side of the circuit board adjacent the protective capacitor and projecting towards the first axial end of the housing, the first set of terminals being configured to electrically couple line and neutral wires of the first power cord to the protective capacitor; and
a second set of terminals mounted on a second side of the circuit board adjacent the protective capacitor and projecting towards the second axial end of the housing, the second set of terminals being configured to electrically couple line and neutral wires of the second power cord to the protective capacitor,
wherein the protective capacitor is configured to discharge when current draw by the load exceeds a current threshold.