The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2006
Filed:
Jan. 04, 2005
Masakazu Kobayashi, Yokosuka, JP;
Tomiyuki Segawa, Yokosuka, JP;
Yuki Nakajima, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An electric motor structure includes a rotary shaft with a coolant passageway therein and a rotor with a cooling surface non-rotatably coupled to the rotary shaft. The coolant is supplied from the coolant passageway of the rotary shaft to the cooling surface of the rotor and flows along the cooling surface of the rotor as a liquid film. The electric motor structure is further provided with a coolant discharge restricting section configured and arranged to restrict discharging of the coolant from the cooling surface. The coolant discharge restricting section protrudes from the cooling surface in a direction substantially perpendicular to the cooling surface where the coolant flown along the cooling surface is discharged from the cooling surface. Thus, a high cooling performance is obtained even when the rotor rotates at high rotational speeds by maintaining a sufficient liquid film thickness.