US 11,938,598 B2
Power tool component position sensing
Jacob P. Schneider, Cedarburg, WI (US); John S. Dey, IV, New York, NY (US); and Timothy R. Obermann, Waukesha, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Sep. 28, 2022, as Appl. No. 17/954,461.
Application 17/954,461 is a continuation of application No. 16/708,582, filed on Dec. 10, 2019, granted, now 11,465,264.
Claims priority of provisional application 62/777,963, filed on Dec. 11, 2018.
Prior Publication US 2023/0015954 A1, Jan. 19, 2023
Int. Cl. B25B 23/00 (2006.01); B25B 21/02 (2006.01); B25B 23/147 (2006.01); B25D 11/06 (2006.01); B25F 5/00 (2006.01)
CPC B25B 23/1475 (2013.01) [B25B 21/023 (2013.01); B25D 11/068 (2013.01); B25F 5/00 (2013.01); B25D 2250/221 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power tool comprising:
a motor;
an impact mechanism coupled to the motor, the impact mechanism including:
a hammer driven by the motor, the hammer including a first sensible feature and a second sensible feature,
an anvil configured to receive an impact from the hammer, and
a spring configured to axially bias the hammer to engage the anvil;
an impact case housing the anvil, the hammer, and the spring;
a sensor configured to generate an output signal indicative of a compression of the spring; and
a processing unit connected to the sensor and to the motor, the processing unit configured to control the motor based on the output signal from sensor.