US 12,138,766 B2
Impact power tool
Tyler Petrus, Baltimore, MD (US); and Robert J. Opsitos, Felton, PA (US)
Assigned to BLACK & DECKER INC., New Britain, CT (US)
Filed by BLACK & DECKER INC., New Britain, CT (US)
Filed on Dec. 7, 2023, as Appl. No. 18/533,034.
Application 18/533,034 is a continuation of application No. 17/811,337, filed on Jul. 8, 2022, granted, now 11,872,680.
Claims priority of provisional application 63/222,824, filed on Jul. 16, 2021.
Prior Publication US 2024/0109173 A1, Apr. 4, 2024
Int. Cl. B25D 17/00 (2006.01); B25B 21/02 (2006.01); B25D 17/06 (2006.01); B25F 5/00 (2006.01); B25F 5/02 (2006.01)
CPC B25D 17/06 (2013.01) [B25B 21/026 (2013.01); B25F 5/001 (2013.01); B25F 5/02 (2013.01); B25D 2211/064 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An impact power tool comprising:
a housing;
a motor received in the housing;
a transmission drivable by the motor;
an impact assembly including a rotatable cam shaft, a hammer coupled to the cam shaft for axial and rotational movement relative to the cam shaft, a rotatable anvil, and a spring biasing the hammer toward the anvil, the hammer configured to transmit continuous rotational torque to the anvil when an output torque is less than a first torque threshold and to apply rotational impacts to the anvil when the output torque is greater than or equal to the first torque threshold;
a coupler configured to releasably couple the cam shaft to the transmission to transmit torque from the transmission to the cam shaft, the coupler configured to decouple the cam shaft from the transmission when the hammer moves along the cam shaft away from the anvil by greater than a first distance, interrupting torque transmission from the transmission to the cam shaft.