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:
May. 05, 2009
Filed:
Jul. 25, 2006
Takafumi Asada, Osaka, JP;
Hiroaki Saito, Ehime, JP;
Daisuke Ito, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A hydrodynamic bearing type rotary device which allows bubbles in a lubricating fluid to be surely discharged from a bearing portion is provided. A hydrodynamic bearing mechanismof the hydrodynamic bearing type rotary device is formed of a sleeve, a shaft, a flange, a thrust plate, a seal cap, and oil. A first fluid reservoir F is formed between the sleeve, the flange, and the thrust plate. A second fluid reservoir H is formed between the sleeveand the seal cap. In the sleeve, a communication hole G extending along an axial direction is formed. The first fluid reservoir F and the second fluid reservoir H communicate with each other through the communication hole G. The oilis filled between the members. A capillary pressure is higher in the first fluid reservoir F than in the second fluid reservoir H.