The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Sep. 11, 2020
Power Packer North America, Inc., Westfield, WI (US);
Marcel Gerardus Maria Nieuwenhuis, Oldenzaal, NL;
Johnny Antonius Jacobus Wiggemans, Oldenzaal, NL;
Power Packer North America, Inc., Westfield, WI (US);
Abstract
Pump unit () comprising an electrically driven hydraulic pump () for pressurising a hydraulic actuating system. The pump unit () comprises a hydraulic pump () in pump chamber () of a pump housing (). The pump () is driven by an electric motor () which includes a motor rotor body () and an assembly of field coils () and magnets (). A clearance (C) is provided around the motor rotor body () which is diverging in the axial direction from a small to a large diameter, such that a rotation of the motor rotor body () forces hydraulic fluid to flow towards the larger diameter. The fluid outlet () at the larger diameter of the clearance allows an exit of the hydraulic fluid, such that a fluid flow is generated which reduces hydraulic friction inside the pump unit to render an increase in pump capacity.