US 12,251,801 B2
Torque stick for a rotary impact tool
Jonathan E. Abbott, Wilmington, DE (US); Jacob P. Schneider, Cedarburg, WI (US); Peter Malak, Waukesha, WI (US); and Christopher S. Hoppe, Milwaukee, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Apr. 11, 2024, as Appl. No. 18/632,535.
Application 18/632,535 is a continuation of application No. 17/497,753, filed on Oct. 8, 2021, granted, now 11,986,932.
Claims priority of provisional application 63/089,856, filed on Oct. 9, 2020.
Prior Publication US 2024/0253193 A1, Aug. 1, 2024
Int. Cl. B25B 23/00 (2006.01); B25B 21/02 (2006.01); B25B 23/147 (2006.01)
CPC B25B 23/1475 (2013.01) [B25B 21/026 (2013.01); B25B 23/0021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a rotary impact tool, the method comprising:
activating a motor to provide torque to a drive assembly, causing the drive assembly to rotate;
in response to a reaction torque on the drive assembly exceeding a threshold value, providing rotational impacts to a torque stick coupled to an anvil of the drive assembly;
sensing a position of the anvil with a position sensor, the position sensor transmitting a first signal indicative of the anvil rotating in a first direction and a second signal indicative of the anvil rotating in a second direction opposite the first direction, the second direction is a rebound angle of the anvil;
calculating torque transferred from the torque stick to a workpiece by multiplying the rebound angle by a torsional stiffness value of the torque stick; and
deactivating the motor in response to the torque exerted on the workpiece being substantially equal to a torque limit.