Patent ID: 7073639

Claim:
A rotational machine comprising: a shaft having a central axis; a rotary member mounted on the shaft in such a manner that the rotary member can rotate about the central axis of the shaft with a bearing fitted between the shaft and the rotary member; an oil seal for sealing the bearing to prevent leakage of lubricant from inside the bearing through an axial end thereof onto a surface of the rotary member; a brake which comes into sliding contact with a contact surface area formed on part of the surface of the rotary member for arresting rotation of the rotary member; a supporting member fixedly mounted on the shaft, face to face with the rotary member forming a gap between the rotary member and the supporting member, the gap serving as a fluid path through which the lubricant which has leaked over the oil seal is allowed to flow; and an oil stopper formed at a location in the gap between the oil seal and the contact surface area for impeding flow of the leaked lubricant.