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US 5,407,331 AGranted
Motor-driven pump
AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorMasahiro Atsumi
Life of this patent
Estimating the term…
Abstract
An integrated motor-driven pump includes an electromagnet disposed in the pump casing opposite a magnet mounted to an impeller of the pump. The impeller is rotatably supported within the casing, and is rotated by inducing a repulsion force in the magnet. In addition, a bearing rotatably supporting the impeller is provided in a portion of the casing formed with a flow passageway which leads working fluid handled by the pump flow to both sides of the bearing so that the bearing can be lubricated and cooled by the working fluid.
Claims14
A motor-driven pump comprising:
- a casing defining an inlet of the pump, an outlet of the pump, and a main passageway communicating with both the inlet and the outlet;
- an impeller disposed within said casing in said main passageway;
- a rotary bearing rotatably supporting said impeller, said bearing including a series of rolling members;
- a permanent magnet fixed to said impeller;
- an electromagnet fixed to said casing;
- and a flow passageway open in the pump to said main passageway and to opposite sides of said series of rolling members such that fluid from said main passageway will freely pass through said flow passageway and over the rotary bearing at both sides of the series of rolling members thereof.
3 more elements
A motor-driven pump comprising:
- a casing defining an inlet of the pump, an outlet of the pump, and a main passageway communicating with both the inlet and the outlet;
- an impeller disposed within said casing in said main passageway;
- a rotary bearing rotatably supporting said impeller, said bearing including a series of rolling members;
- an induction coil fixed to said impeller;
- an electromagnet fixed to said casing;
- and a flow passageway open in the pump to said main passageway and to opposite sides of said series of rolling members such that fluid from said main passageway will freely pass through said flow passageway and over the rotary bearing at both sides of the series of rolling members thereof.
3 more elements
Dependencies are inferred from the claim text.