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US 6,499,966 B1Granted
Motor driven pump
AssigneeAutomative Motion Technology, Ltd.
InventorsJohn Michael Werson, Robert William Beaven
Life of this patent
Estimating the term…
Abstract
A motor driven pump comprises a motor stator (30), a motor rotor (10) operable to rotate around the outside of the stator (30) and a pump mechanism (40, 50) driven by the motor rotor (10) and disposed at least partly inside the motor stator (30).
Claims10
A motor driven pump comprising:
- a motor stator;
- a motor rotor operable to rotate around the outside of the stator about a central shaft and a pump mechanism driven by the motor rotor and disposed about the central shaft at least partly inside the motor stator the motor rotor being sealed from fluid flowing through the pump mechanism, the pump mechanism including a plurality of pump rotors at least partly disposed inside the motor stator of which one is constituted by the central shaft, and a single bearing is provided for the central shaft which acts as a bearing for both the motor and pump.
A motor vehicle power steering system, the system comprising a hydraulically driven steering arrangement;
- and a motor driven pump for supplying hydraulic fluid to the steering arrangement the motor driven pump comprising a motor stator;
- a motor rotor operable to rotate around the outside of the stator about a central shaft and a pump mechanism driven by the motor rotor and disposed about the central shaft at least partly inside the motor stator the motor rotor being sealed from fluid flowing through the pump mechanism, the pump mechanism including a plurality of pump rotors at least partly disposed inside the motor stator of which one is constituted by the central shaft, and a single bearing is provided for the central shaft which acts as a bearing for both the motor and pump.
Dependencies are inferred from the claim text.