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:
Sep. 19, 2006
Filed:
Nov. 15, 2004
Yoshio Fujii, Kyoto, JP;
Hitoshi Urakami, Kyoto, JP;
Yoshio Fujii, Kyoto, JP;
Hitoshi Urakami, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
The present invention can make the motor life of a motor be longer under the high temperature environment. The motor has a sleeve which is formed by a porous material made of a metal powder and the sleeve is held in a cylindrical sleeve holding part. An annular concave gap is formed between the sleeve and the sleeve holding part. In this annular concave gap, a member which can keep an excess oil is inserted. A first upper inner peripheral part of the sleeve holding part has a first minute gap between an outer peripheral surface of the sleeve, and the first minute gap has an enough width for an adhering oil to be absorbed by the sleeve when the adhering oil adheres to the first minute gap.