Dynamic pressure type fluid bearing device

摘要

PCT No. PCT/JP83/00292 Sec. 371 Date May 1, 1984 Sec. 102(e) Date May 1, 1984 PCT Filed Sep. 2, 1983 PCT Pub. No. WO84/01006 PCT Pub. Date Mar. 15, 1984.A dynamic pressure type fluid bearing device including a housing having a bearing hole, a shaft rotatably provided in this bearing hole, and a thrust bearing member attached to an end of the housing, wherein a groove is provided in either the shaft or the bearing hole, another groove is provided in the contacting surface between the thrust bearing member and the shaft, a ventilation flute to communicate with the atmosphere is provided in the contacting surface between the thrust bearing member and the housing, and a lubricant is charged around the groove, so that the lubricant is prevented from flowing out due to changes in the atmospheric pressure or environment.