Power Packer North America, Inc.

Actuant Corporation

Marcel Gerardus Maria Nieuwenhuis

Johnny Antonius Jacobus Wiggemans

Dennis Haarbrink

Robertus Justinus Stegeman

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.

Pump unit with conical motor chamber

A hydraulic motor pump unit for pressurising a hydraulic fluid in a hydraulic circuit. The motor pump unit includes a motor having a motor stator holding a circular array of coils and a motor rotor having a motor rotor body having an outer circumferential rotor surface holding a circular array of magnets. The motor rotor body is positioned within the motor stator holding the magnets opposite the coils. A pump is drivable connected to the motor rotor. A housing body provided with a pump chamber for housing the pump and a cylindrically shaped coil support for supporting the circular array of coils. The housing comprises at least one housing end cap which is connected to the coil support which housing end cap is provided with a fin pattern for an air cooling of the housing to an environment.

High voltage motor-pump unit

An automotive hydraulic actuating system for actuating a movable vehicle part, like a roof part or a wheel suspension. The actuating system comprises a pump unit. The pump unit comprises a piston pump which has a pump rotor and an electric motor which has a motor rotor. The pump rotor and motor rotor are incorporated into a single common rotor. The rotor is a one piece item. The rotor is positioned inside a pump chamber around a pump stator of the piston pump. The pump stator provides a full support to the common rotor. Advantageously, without a separate motor stator, the pump unit has a more compact configuration. Additionally, the pump unit has an improved dynamic performance which contributes to a silent and reliable operation at a high rotational speed.

Growing community of inventors

Enschede, Netherlands

Marcel Gerardus Maria Nieuwenhuis