Fluid compressor

Abstract

A fluid compressor includes a housing, a compression chamber, and a shaft including two vanes that each extend from the shaft to contact an inner surface of the compression chamber. The shaft, vanes, and inner surface of the compression chamber define at least two suction pockets and at least two discharge compression pockets arranged around a perimeter of the shaft. Each suction pocket is between two discharge pockets and each discharge pocket is between two suction pockets.

What is claimed is: 
     
         1 . A fluid compressor comprising:
 a housing;   a compression chamber; and   a shaft including two vanes that each extend from the shaft to contact an inner surface of the compression chamber, the shaft, vanes, and as surface of the compression chamber defining at least two suction pockets and at least two discharge compression pockets arranged around a perimeter of the shaft, each suction pocket being between two discharge pockets and each discharge pocket being between two suction pockets.   
     
     
         2 . The fluid compressor as set forth in  claim 1 , further comprising:
 discharge valves on a compression chamber cover plate.   
     
     
         3 . The fluid compressor as set forth in  claim 1 , further comprising:
 discharge valves on a bearing hub.   
     
     
         4 . The fluid compressor as set forth in  claim 1 , wherein the shaft rotates symmetrically around a shaft centerline. 
     
     
         5 . The fluid compressor as set forth in  claim 1 , wherein the motor is fixed directly to an inner surface of the housing. 
     
     
         6 . The fluid compressor as set forth in  claim 1 , wherein the shaft includes an off center oil passage that runs from a top to a bottom of the shaft. 
     
     
         7 . The fluid compressor as set forth in  claim 6 , wherein the bottom of the shaft extends into an oil sump within a lower bearing. 
     
     
         8 . The fluid compressor as set forth in  claim 1 , wherein the compressor includes exactly two discharge pockets and exactly two suction pockets.