	US 12,311,519 B2
	Hydraulic pump
James G. Ballard, Waukesha, WI (US); Timothy Radtke, New Berlin, WI (US); Daniel Garces, Waukesha, WI (US); and Ian C. Zimmerman, Milwaukee, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed on Apr. 16, 2024, as Appl. No. 18/637,113.
Application 18/637,113 is a division of application No. 16/565,381, filed on Sep. 9, 2019, granted, now 11,958,177.
Claims priority of provisional application 62/728,157, filed on Sep. 7, 2018.
Prior Publication US 2024/0261953 A1, Aug. 8, 2024
Int. Cl. B25F 5/00 (2006.01); F04B 1/34 (2006.01); F04B 7/00 (2006.01); F04B 7/02 (2006.01); F04B 9/04 (2006.01); F04B 17/03 (2006.01); F04B 23/06 (2006.01); F04B 49/03 (2006.01); F04B 49/06 (2006.01); F04B 49/08 (2006.01); F04B 49/22 (2006.01); H04W 36/30 (2009.01)

CPC B25F 5/005 (2013.01) [F04B 1/34 (2013.01); F04B 7/0038 (2013.01); F04B 7/02 (2013.01); F04B 9/042 (2013.01); F04B 17/03 (2013.01); F04B 23/06 (2013.01); F04B 49/03 (2013.01); F04B 49/06 (2013.01); F04B 49/08 (2013.01); F04B 49/22 (2013.01); H04W 36/305 (2018.08); F04B 2201/06 (2013.01); F04B 2205/16 (2013.01)]

9 Claims

1. A hydraulic pump to provide fluid to a hydraulic tool to perform an operation on a workpiece, the hydraulic pump comprising:

a work port that supplies fluid to the hydraulic tool;

a high-flow piston that supplies fluid along a first flow path to the work port;

a plurality of high-pressure pistons that supply fluid along a second flow path to the work port;

an unloading valve positioned along the first flow path, the unloading valve actuating from an open state to a closed state when a pressure level of fluid in the second flow path exceeds a first threshold pressure; and

a controller to allow a user to select a mode of operation, the controller setting a second threshold pressure of the hydraulic pump based on the mode of operation, the second threshold pressure corresponding to an end operation of the hydraulic tool.