US 12,246,421 B2
Powered fastener driver
David A. Bierdeman, New Berlin, WI (US); and Marcus Wechselberger, Milwaukee, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Feb. 6, 2023, as Appl. No. 18/164,680.
Application 18/164,680 is a continuation in part of application No. 17/214,002, filed on Mar. 26, 2021, granted, now 11,872,678.
Claims priority of provisional application 63/129,737, filed on Dec. 23, 2020.
Claims priority of provisional application 63/042,211, filed on Jun. 22, 2020.
Claims priority of provisional application 63/000,722, filed on Mar. 27, 2020.
Prior Publication US 2023/0182275 A1, Jun. 15, 2023
Int. Cl. B25C 1/04 (2006.01); B25C 1/00 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/008 (2013.01); B25C 1/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fastener driver comprising:
a cylinder;
a moveable piston positioned within the cylinder;
a driver blade attached to the piston and movable therewith between a top-dead-center (TDC) position and a driven or bottom-dead-center (BDC) position, the driver blade defining a driving axis;
a lifter operable to move the driver blade from the BDC position toward the TDC position;
a motor and a transmission operatively coupled to the motor for providing torque to the lifter, the transmission being a multi-stage planetary transmission having at least a first stage and a last stage, and an output shaft of the last stage extending to the lifter; and
a one-way clutch mechanism configured to permit a transfer of torque to the output shaft in a first rotational direction, and prevent the motor from being driven in a second rotational direction opposite the first rotational direction, the one-way clutch further configured to permit selective limited rotation of the output shaft in the second rotational direction;
wherein the one-way clutch mechanism includes a carrier of one of the stages of the multi-stage planetary transmission, and a plurality of ratchet members movably coupled to the carrier;
wherein the carrier is rotatable about a rotational axis; and
wherein each ratchet member includes a surface having inclined teeth complimentary to inclined teeth of a toothed interior peripheral portion of a ring gear of the one of the stages of the multi-stage planetary transmission.