Patent ID: 8146923

Claim:
A vacuum apparatus of rotary motion entry, comprising: a rotary shaft, for power transmission; a shaft sleeve, having a base with an extension formed extending from an end thereof for fixing the shaft sleeve on a cavity wall of a vacuum system; and a transmission set, connected to the rotary shaft at a section thereof extruding outside the shaft sleeve and away from the extension of the base to be used for driving the same to rotate; wherein, the rotary shaft is disposed passing through a hole formed on the base of the shaft sleeve while configured a first bearing, a second bearing, at least one sealing ring and a shaft seal separately inside the hole at positions spaced from each other and corresponding to the rotary shaft in a manner that the first bearing and the second bearing are used for carrying the rotary shaft without obstructing the same from rotating, and the shaft seal is disposed at a side away from the extension of the base; and the shaft seal, being configured with a flake-like lip flange formed at an end thereof away from the extension of the base while extending away the center of the hole, is enabled to warp around the circumference of the rotary shaft by the lip flange thereof as the lip flange is capable of being forced to extend in a direction away from the extension by the inserting of the rotary shaft into the hole.