Patent ID: 7572059
Filing Date: 2009-08-11
Classification: F16C

Abstract:
1. A fluid circulating hydrodynamic pressure bearing, the bearing comprising: a driving member to drive recording media; a supporting member to rotatably support the driving member to define a hydrodynamic pressure generating space between the driving member and the supporting member, the supporting member being formed with a fluid outlet through which the fluid passes at a predetermined position; a plurality of recesses to generate hydrodynamic pressure, the recesses being formed on at least one of the driving member and the supporting member to be opened toward the hydrodynamic pressure generating space; and a fluid circulating member to circulate the fluid out-flowing from the fluid outlet to the hydrodynamic pressure generating space, the fluid circulating member being fixedly combined with the driving member to slidably support the supporting member, wherein the fluid circulating member has a fluid keeping space to keep the fluid out-flowing from the fluid outlet for a predetermined time, and a fluid sending hole to send the fluid kept in the fluid keeping space to the hydrodynamic pressure generating space.