Patent ID: 8136802

Claim:
A level compensator comprising: a fixing tube which is fastened to a structure; a hollow slider which is disposed inside the fixing tube so as to perform up-and-down movement; and a spring which is disposed between the fixing tube and the slider so as to elastically support the movement of the slider, wherein a vacuum pump which includes an inflow port formed in one end thereof, an outflow port formed in the other end thereof, and an inhalation hole formed on a side wall thereof is mounted in a space inside the slider, and wherein when compressed air guided to an upper opening port of the slider passes between the inflow port and the outflow port of the vacuum pump and is discharged through a discharging port formed on a side wall of the slider, air communicating with the lower portion of the slider is induced to the space inside the slider and passes through the inhalation hole of the vacuum pump to be discharged along with the compressed air.