ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,331, issued on Aug. 19, was assigned to Enerpac Tool Group Corp. (Milwaukee).
"Hydraulic pump with two-stage operation" was invented by Nathan Adam Hughes (Cottage Grove, Wis.) and Curtis L. Van Weelden (Waukesha, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pump may generally include a frame including a reservoir. The reservoir stores a hydraulic fluid. The pump may also include a motor assembly supported by the frame and a pump assembly operably driven by the motor assembly. The pump assembly is in fluid communication with the reservoir and configured to dispense the hydraulic fluid out of the frame. The pump assembly includes a first pis...