US 12,172,274 B2
Lifter assembly for a powered fastener driver
Marcus Wechselberger, Milwaukee, WI (US); Troy C. Thorson, Cedarburg, WI (US); and David A. Bierdeman, New Berlin, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Jun. 22, 2023, as Appl. No. 18/339,278.
Application 17/962,037 is a division of application No. 16/696,818, filed on Nov. 26, 2019, granted, now 11,498,194, issued on Nov. 15, 2022.
Application 18/339,278 is a continuation of application No. 17/962,037, filed on Oct. 7, 2022, granted, now 11,724,376.
Claims priority of provisional application 62/807,875, filed on Feb. 20, 2019.
Claims priority of provisional application 62/773,300, filed on Nov. 30, 2018.
Claims priority of provisional application 62/771,743, filed on Nov. 27, 2018.
Prior Publication US 2023/0330823 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B25C 1/04 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A powered fastener driver comprising:
a driver blade movable from a top-dead-center (TDC) position toward a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece;
a gas spring mechanism for driving the driver blade toward the BDC position;
a lifter assembly having a rotary lifter for returning the driver blade from the BDC position toward the TDC position;
a motor that provides torque to the rotary lifter to return the driver blade from the BDC position toward the TDC position; and
a cam which, during rotation of the rotary lifter, causes the rotary lifter to axially move along a rotational axis defined by the rotary lifter between a first position, in which the rotary lifter is engageable with the driver blade, and a second position, in which the rotary lifter is not engageable with the driver blade.