US 12,134,173 B2
Powered fastener driver
Logan M. Hietpas, Glendale, WI (US); James Wekwert, Wauwatosa, WI (US); Matthew N. Thurin, Wausatosa, WI (US); John S. Scott, Brookfield, WI (US); and Caroline Fox, Milwaukee, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Appl. No. 17/046,166
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
PCT Filed Apr. 14, 2020, PCT No. PCT/US2020/028065
§ 371(c)(1), (2) Date Oct. 8, 2020,
PCT Pub. No. WO2020/214558, PCT Pub. Date Oct. 22, 2020.
Claims priority of provisional application 62/835,243, filed on Apr. 17, 2019.
Prior Publication US 2023/0150101 A1, May 18, 2023
Int. Cl. B25C 1/04 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A gas spring-powered fastener driver comprising:
a first cylinder defining a first chamber;
a movable piston positioned within the first chamber;
a driver blade attached to the piston and movable therewith between a ready position and a driven position;
a second cylinder surrounding the first cylinder;
a second chamber defined between the first cylinder and the second cylinder and containing pressurized gas, the second chamber being in fluid communication with the first chamber via a flow passage;
a lifter mechanism configured to move the driver blade and the movable piston from the driven position to the ready position to compress the pressurized gas; and
a throttle mechanism configured to throttle flow of the pressurized gas through the flow passage, the throttle mechanism including a baffle configured to selectively adjust an area of the flow passage;
wherein the first cylinder defines an open end that communicates with the second chamber, and the flow passage is defined between the open end of the first cylinder and an end portion of the second cylinder; and
wherein the baffle is configured as a sliding sleeve that surrounds the open end of the first cylinder and the baffle slides along the first cylinder.