Scroll compressors

A scroll compressor comprising:

• a stationary scroll;
• a drive shaft;
• a crank shaft coupled to the drive shaft;
• a bush coupled to the outer surface of the crank shaft;
• a movable scroll coupled to the crank shaft, the movable scroll disposed adjacent to the stationary scroll;
• a compression chamber defined by a space between the stationary scroll and the movable scroll, wherein fluid is compressed in the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll;
• a discharge port defined within the movable scroll and adapted to release the compressed fluid to a side that is opposite the stationary scroll;
• and
• means for sealing the clearance between the bush and the crank shaft in the radial direction of the crank shaft, wherein the sealing means prevents the high-pressure fluid compressed in the compression chamber from leaking to a lower pressure space within the scroll compressor via a clearance between the bush and the crank shaft.

A scroll compressor comprising:

• a stationary scroll;
• a drive shaft;
• a crank shaft coupled to the drive shaft;
• a bush coupled to the outer surface of the crank shaft;
• a seal disposed within a seal receiving space between the bush and the crank shaft, wherein the seal is elastically deformable in the radial direction of the crank shaft and the height of the seal receiving space measured in the radial direction of the crank shaft is greater than the height of the clearance between the bush and the crank shaft;
• a movable scroll coupled to the crank shaft, the movable scroll disposed adjacent to the stationary scroll;
• a compression chamber defined by a space between the stationary scroll and the movable scroll, wherein fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll;
• and
• a discharge port defined within the movable scroll and adapted to release the compressed fluid to a side that is opposite of the stationary scroll.