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US 2026/0055760 A1Published application
Rotor stator pump
AssigneeGraco Minnesota Inc.
InventorsMark D. Shultz, Joshua D. Roden
Life of this patent
Estimating the term…
Abstract
A rotor stator pump includes a rotating helical component and a static helical component. An electric motor is connected to the rotating helical component to drive rotation of the rotating helical component. The rotating helical component and the static helical component are disposed radially inward of the motor rotor of the electric motor.
Claims20
A pump comprising:
- a pump body having a pump housing, a first end plate connected to a first end of the pump housing and a second end plate connected to a second end of the pump housing;
- an electric motor disposed within the pump body, the electric motor including a motor rotor configured to rotate on an axis and a motor stator configured to electromagnetically drive rotation of the motor rotor;
- a pump channel extending through the pump body and the electric motor to define a flowpath for material to flow between a pump inlet and a pump outlet;
- a pump stator disposed radially inward of the electric motor;
- a pump rotor configured to rotate relative to the pump stator to form a series of progressing cavities to pump the material;
- an outer drive configured to be rotated on the axis by the electric motor;
- and
- an inner drive connected to the outer drive to be rotated by the outer drive, the inner drive connected to the pump rotor to drive rotation of the pump rotor;
- a first bearing rotatably supporting the outer drive on the pump body;
- and
- a second bearing rotatably supporting the outer drive on the pump body;
- wherein the outer drive radially overlaps with the inner drive.
9 more elements
A pump comprising:
- a pump body;
- an electric motor disposed within the pump body, the electric motor including a motor rotor configured to rotate on an axis and a motor stator configured to electromagnetically drive rotation of the motor rotor;
- a pump channel extending through the pump body to define a flowpath for material to flow between the electric motor and between a pump inlet and a pump outlet;
- an end adaptor connected to the motor rotor to be rotated by the motor rotor;
- a pump stator;
- a pump rotor, the pump rotor configured to rotate relative to the pump stator to form a series of progressing cavities to pump the material;
- and
- a first bearing disposed between an exterior surface of the end adaptor and the pump body to support the end adaptor relative to the pump body;
- wherein the pump channel extends through the end adaptor such that the material flows within the end adaptor.
6 more elements
Dependencies are inferred from the claim text.