Patent ID: 8556509

Claim:
An active compensating hydrostatic bearing disposed between a first structure and a second structure to allow relative movement between the first structure and the second structure, the active compensating hydrostatic bearing comprising: a body, which has a first top surface and a first bottom surface disposed opposite the first top surface, wherein the first top surface is fixed to and in direct contact with the first structure, and the first bottom surface is separated from the second structure by a first gap, wherein the body further has a chamber and an input passage and an output passage both communicating with the chamber, and a compensator, which is disposed in the chamber, and has a top surface directly contacting with the body and a bottom surface disposed opposite the top surface, wherein a compensating passage is formed between the body and the bottom surface of the compensator, the compensating passage communicates with the input passage and the output passage, a pressurized fluid flows from the input passage to the output passage through the compensating passage, and the pressurized fluid in the output passage flows to the first gap to maintain stability and rigidity for the relative movement between the first and second structures.