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:
Nov. 20, 2012
Filed:
Mar. 28, 2011
Toshikazu Himeno, Kyoto, JP;
Shozo Tagata, Kyoto, JP;
Shinya Yano, Kyoto, JP;
Wataru Yamauchi, Kyoto, JP;
Akihiro Yudate, Kyoto, JP;
Toshikazu Himeno, Kyoto, JP;
Shozo Tagata, Kyoto, JP;
Shinya Yano, Kyoto, JP;
Wataru Yamauchi, Kyoto, JP;
Akihiro Yudate, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A spindle motor for use in a disk drive apparatus includes stationary and rotating portions. The stationary portion includes a shaft including a thrust plate. A sleeve portion includes an axial end surface arranged opposite the thrust plate. A first seal member is arranged opposite the thrust plate on an opposite side with respect to the sleeve portion. The thrust plate preferably includes a plate communicating hole arranged to connect first and second thrust gaps defined, respectively, between the thrust plate and the sleeve portion and between the thrust plate and the first seal member. The sleeve portion preferably includes a sleeve communicating hole arranged to connect the first thrust gap with an opposite axial side thereof. A lubricant is arranged to fill a communicating channel extending from a first to a second capillary seal portion through the plate communicating hole and the sleeve communicating hole.