Patent ID: 8033729

Claim:
A movement guiding device for a vacuum environment, said movement guiding device comprising: a track member having a rolling-element rolling part and extending linearly; a moving member having a rolling-element circulation passage containing a loaded rolling-element rolling part facing the rolling-element rolling part and moving linearly relatively to the track member; a plurality of rolling elements arranged in the rolling-element circulation passage; and an end clearance seal arranged with an end of the moving member in moving directions thereof, formed to have an opening of which contour is consistent with a sectional form of the track member and preventing vaporized lubricant oil or grease from leaking outside the movement guiding device and into the vacuum environment, wherein the end clearance seal is located without coming in contact with the track member and a clearance formed between the end clearance seal and the track member is smaller than a clearance formed between the moving member and the track member, the end clearance seal has a surface facing the track member, which surface is formed to have a concavo-convex shape in a longitudinal direction of the track member, the end clearance seal comprises a plurality of first plates formed into thin plates and a plurality of second plates formed into thin plates, wherein the first and second plates are laminated on one another in a alternate order between the first and second plates; the first and second plates have an opening whose contour is made consistent with a shape of the track member; and a clearance formed between the second plates and the track member is made larger than a clearance formed between the first plates and the track member so that the surface of the end clearance seal, which surface faces the track member, is formed to have the concavo-convex shaped, provided the first and second plates are laminated on one another.