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|1. (WO2018159474) PUMP DEVICE|
|Applicants:||NIDEC TOSOK CORPORATION
This pump device 10 comprises a motor unit 20 which rotates the shaft 41, a pump unit 30 which is driven by the shaft 41 and which sucks in and delivers oil to the motor unit 20. The pump device 10 comprises: a first flow path through which, by negative pressure in the pump unit 30, oil is sucked through a suction port 32c provided in a pump cover 32 into the pump unit 30; a second flow path through which, by pressurization in the pump unit 30, oil is delivered from an delivery port 31c provided in the pump body 31 into the motor unit 20; a third flow path which is provided between the stator 50 and the rotor 40; a fourth flow path 4 which is provided between the stator 50 and the housing 12; and a fifth flow path through which the oil inside of the motor unit 20 is discharged from a discharge port 12b provided in the housing 12.