US 12,241,465 B2
Pump and filling assembly
Roger Roy Pili, Cambridge, WI (US); and Michael Zimmer, Beaver Dam, WI (US)
Assigned to Enerpac Tool Group Corp., Menomonee Falls, WI (US)
Filed by Enerpac Tool Group Corp., Menomonee Falls, WI (US)
Filed on Nov. 16, 2023, as Appl. No. 18/510,935.
Claims priority of provisional application 63/386,260, filed on Dec. 6, 2022.
Prior Publication US 2024/0183350 A1, Jun. 6, 2024
Int. Cl. F04B 9/14 (2006.01); F04B 23/02 (2006.01)
CPC F04B 9/14 (2013.01) [F04B 23/025 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A pump comprising:
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.