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, wherein the movable scroll includes a boss that extends in the axial direction of the crank shaft,
• 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,
• a discharge port defined within the movable scroll and adapted to discharge compressed fluid to a side that is opposite of the stationary scroll,
• a high-pressure chamber surrounded by the boss and
• means for sealing a clearance defined between the bush and the boss to prevent the fluid from leaking from the high pressure chamber.

A scroll compressor comprising:

• a stationary scroll,
• a drive shaft,
• a drive shaft member including a crank shaft coupled to the drive shaft, wherein the central axis of the crank shaft is offset or displaced from the central axis of the drive shaft,
• a movable scroll coupled to the drive shaft member, wherein the movable scroll includes a boss that extends in the axial direction of the drive shaft member,
• a seal disposed between the drive shaft member and the boss,
• 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 provided within the movable scroll in order to discharge compressed fluid to the opposite side of the stationary scroll.