Enerpac Tool Group Corp.

Roger Roy Pili

Nathan Adam Hughes

Michael Zimmer

A pump and a filling assembly for a pump. The pump may generally include a flexible bladder configured to contain oil, the bladder having a bladder inlet and a bladder outlet; a pump mechanism in fluid communication with the bladder outlet and configured to dispense oil from a pump port; and a plug including a body extending along an axis and having a flange, a first stem extending from one side of the flange, and a second stem extending from an opposite side of the flange, the first stem being configured to extend into the bladder inlet, the body defining an oil passage and a separate air passage configured to allow simultaneous flow of oil into the bladder and air out of the bladder.

Pump and filling assembly

A drive system for an industrial tool (e.g., a hydraulic torque wrench) includes a cylinder, a first piston, a first rod, a second piston, and a second rod. The cylinder includes a first end, a second end, and a longitudinal axis extending therebetween. The first piston is disposed within the cylinder and movable along the longitudinal axis. The first rod is coupled to the first piston and extends toward the first end of the cylinder. The second piston is disposed within the cylinder and movable along the longitudinal axis. The second rod is coupled to the second piston and extends toward the first end of the cylinder.

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Cambridge, WI, United States of America

Roger Roy Pili