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:
Apr. 08, 2014
Filed:
Nov. 23, 2010
Akihiro Kimura, Kyoto, JP;
Kyoko Horise, Kyoto, JP;
Ryota Ogino, Kyoto, JP;
Kunio Sakurada, Kyoto, JP;
Teiichi Hirono, Kyoto, JP;
Akihiro Kimura, Kyoto, JP;
Kyoko Horise, Kyoto, JP;
Ryota Ogino, Kyoto, JP;
Kunio Sakurada, Kyoto, JP;
Teiichi Hirono, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A dynamic pressure bearing has a reduced axial dimension and is constructed to ensure smooth feeding of a lubricating oil. The dynamic pressure bearing includes a communicating hole and at least one tapered seal, and is constructed such that an opening angle of one of the at least one tapered seal through which oil feeding is possible is in a range of about 30 degrees inclusive to about 180 degrees exclusive, a tapered seal wall surface depth Wof the tapered seal is about 0.3 mm or more, and a sum of distances over which the lubricating oil travels from both sides of an end portion of the communicating hole in a cross-section beyond a wall surface of the communicating hole along a wall surface opposite the end portion of the communicating hole exceeds an inside diameter of the communicating hole.