Patent ID: 8051813

Claim:
A scroll compressor for compressible fluids, comprising: a fixed housing having a spiral-shaped feed chamber which contains a working fluid; a driveshaft supported in the housing and having an eccentric disk; a displacement member interacting with the spiral-shaped feed chamber and including, a carrier disk, and spiral blades extending out from both sides of the carrier disk; a bearing supporting the carrier disk of the displacement member on the eccentric disk of the driveshaft; a lubricant supply system having a lubricant chamber which contains lubricant and feeding lubricant to the bearing via the driveshaft and the eccentric disk; a seal assembly sealing the lubricant chamber against the spiral-shaped feed chamber; and a pressure regulating valve constructed to substantially maintain during operation a differential between a pressure in the spiral-shaped feed chamber acting on one side of the seal assembly and a pressure in the lubricant chamber acting on another side of the seal assembly, with the pressure regulating valve being acted upon by the pressure in the spiral-shaped feed chamber and by the pressure in the lubricant chamber.