Patent ID: 11894751
Assignee: NIDEC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 1:
2. The drive device according to claim 1, further comprising:
a supply restricting member disposed in one axial end portion of the shaft tubular portion,
wherein the supply restricting member includes:
an annular portion that extends in a direction intersecting the rotation axis; and
a tubular restricting portion that extends from a radially inner end portion of the annular portion to the other axial direction,
the space surrounded by an inner peripheral surface of the restricting portion is a part of the fourth flow path, and
a minimum flow-path cross-sectional area in the restricting portion is smaller than a minimum flow-path cross-sectional area in the third flow path.