Multi-stage pump device
AssigneeAisin Seiki Kabushiki Kaisha
InventorsAtsuyuki Miura, Yoshihiro Naito, Noboru Ohtani, Koichi Nakayama
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Abstract
A multi-stage pump device includes a plurality of pump devices, each of the pump devices having a pump portion feeding working fluid under pressure, and a connecting portion provided between at least two of the pump devices, through which working fluid pumped by the respective pump devices passes. The connecting portion is expandable in a direction of the length thereof and is provided with a sealing structure to prevent a leakage of the working fluid. The connecting portion may be two telescopically arranged pipes or a bellows.
Claims16
A multi-stage pump device comprising;
- a plurality of pump devices, each of the pump devices having a pump portion feeding working fluid under pressure;
- and
- a connecting portion provided between at least two of the pump devices, through which working fluid pumped by the respective pump devices passes, wherein the connecting portion is expandable in a direction of the length thereof, and wherein the connecting portion is provided with a sealing structure to prevent a leakage of the working fluid.
A multi-stage pump device comprising;
- a plurality of pump devices, each of the pump devices having a pump portion feeding working fluid under pressure;
- and
- a bellows provided between at least two of the pump devices, through which working fluid pumped by the respective pump devices passes.
A multi-stage pump device comprising:
- at least two pump units;
- and
- working fluid guide means for establishing a fluid flow connection between said pump units, wherein said guide means is capable of being deformed relative to each pump unit.
A multi-stage pump device comprising;
- a plurality of pump devices, each of the pump devices having a pump portion feeding working fluid under pressure and a driving portion which is tightly connected with a supporting frame;
- and
- a connecting portion provided between at least two of the pump devices, through which working fluid pumped by the respective pump devices passes, wherein the connecting portion is expandable in a direction of the length thereof, and wherein the connecting portion is provided with a sealing structure to prevent a leakage of the working fluid.
A multi-stage pump device comprising;
- a plurality of pump devices, each of the pump devices having a pump portion feeding working fluid under pressure and a driving portion which is tightly connected with a supporting frame;
- and
- a bellows provided between at least two of the pump devices, through which working fluid pumped by the respective pump devices passes.
A multi-stage pump device comprising:
- at least two pump units;
- working fluid guide means for establishing a fluid flow connection between said pump units, wherein said guide means is capable of being deformed relative to each pump unit;
- at least two driving units;
- and
- each driving unit is tightly connected with a supporting frame.
Dependencies are inferred from the claim text.