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. 11, 2008
Filed:
Oct. 31, 2005
Hiromi Kita, Nara, JP;
Shigeo Obata, Hyogo, JP;
Kenichi Miyamori, Hyogo, JP;
Hiromitsu Noda, Osaka, JP;
Hiromi Kita, Nara, JP;
Shigeo Obata, Hyogo, JP;
Kenichi Miyamori, Hyogo, JP;
Hiromitsu Noda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A thrust dynamic pressure bearing with high inclination-resistant rigidity against axis runout and additionally low bearing loss torque is implemented. Herringbone grooves () having intermediate bends () are provided on rotating-side bearing surface () provided on the rotating-side bearing member. When rotating-side bearing surface () rotates in direction A (clockwise), lubricating oil generates dynamic pressure in an area centering on intermediate bend () along radially outer part () and radially inner part () of herringbone groove (). As a result that groove width (G) of a dynamic pressure generating groove and width (L) of a land adjacent to the dynamic pressure generating groove holds G>L at an arbitrary radius () position, a thrust dynamic pressure bearing with high inclination-resistant rigidity and additionally low bearing loss torque is provided.