Patent ID: 7168463

Claim:
For a dynamic-pressure bearing device having a rotary component and a stationary component supporting the rotary component, letting the rotary component rotate relative to the stationary component, a bearing gap maintained in between the rotary component and the stationary component, and at least one open portion formed in one end of the bearing gap, the open portion surrounding the rotary component and fronting the surrounding external air, a method of charging the dynamic-pressure bearing device with lubricating fluid, by using a nozzle directed on, to deliver the lubricating fluid to, the open portion of the bearing device, the method comprising: a degassing step of reducing the concentration of gas present dissolved in the lubricating fluid to a first concentration being the concentration at which the dissolved gas is approximately at equilibrium with respect to a gaseous atmosphere of a predetermined first pressure; a pressure-adjusting step of putting the atmosphere at the bearing-device open portion at a second pressure higher than the first pressure and lower than atmospheric pressure; and under the atmosphere having been realized by said pressure-adjusting step, a fluid-dispensing step of streaming lubricating fluid having been through said degassing step, into the bearing-device open portion using the nozzle.