Pump for supplying liquid fuel
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTeruo Maruyama
Life of this patent
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Abstract
A pump for forcedly feeding kerosene or like fluid comprises a rotor, a housing rotatably accommodating the rotor, a stator for forming a rotary magnetic field to rotate the rotor, and a fluid feeding portion. When the rotor is a disk, spiral grooves providing the feeding portion are formed in the rotor and/or a housing wall opposed to the rotor. When the rotor is tubular, a helical groove or grooves are formed in the outer surface of a fixed shaft serving as part of the housing and/or in the inner peripheral surface of the rotor to provide the feeding portion. The pump properly feeds the fluid at widely varying flow rates including a very small rate free of any leak and without producing a loud noise. The pump, including a motor as a component, is compact, thin and simple in construction.
Claims10
A pump comprising housing means providing a rotor accomodating space and having an inlet channel and outlet channel arranged substantially on the axis of the rotor accomodating space in communication therewith for the passage of a fluid;
- a shaftless rotor completely and rotatably accomodated within the rotor accomodating space;
- a stator for magnetically rotating the rotor within the rotor accomodating space;
- and
- groove means formed on at least one of the surfaces of the rotor and the surfaces of the rotor housing means, whereby when the rotor is magnetically rotated by the stator, the fluid is forced forward by the groove means, the rotor being radially and axially supported in the rotor accomodating space solely by a fluid bearing provided by the fluid and the groove means.
Dependencies are inferred from the claim text.