Compressors

Abstract

A compressor includes a suction chamber, a crank chamber, and a drive shaft extending through the crank chamber. The drive shaft includes a passage formed therein, and a hole formed therein. For example, the hole may be formed through the drive shaft. The compressor also includes a path communicating between the crank chamber and the suction chamber. Specifically, the path includes the passage and the hole.

What is claimed is:  
     
         1 . A compressor comprising: 
 a suction chamber;    a crank chamber;    a drive shaft extending through the crank chamber, wherein the drive shaft comprises: 
 a passage formed in the drive shaft; and  
 a hole formed in the drive shaft; and  
   a path communicating between the crank chamber and the suction chamber, wherein the path comprises the passage and the hole.    
     
     
         2 . The compressor of  claim 1 , further comprising: 
 a swash plate rotatably mounted on the drive shaft; and    a rotor fixedly mounted on the drive shaft, wherein the rotor is operationally connected to the swash plate.    
     
     
         3 . The compressor of  claim 1 , wherein the rotor comprises: 
 a front rotor wall; and    a rear rotor wall, wherein the front rotor wall is a first predetermined distance from the swash plate, the rear rotor wall is a second predetermined distance from the swash plate, and the first predetermined distance is greater than the second predetermined distance.    
     
     
         4 . The compressor of  claim 3 , wherein a center of the hole is a third predetermined distance from the front rotor wall, the center of the hole is a fourth predetermined distance from the rear rotor wall, and the third predetermined distance is greater than the fourth predetermined distance.  
     
     
         5 . The compressor of  claim 2 , wherein the rotor comprises: 
 a front rotor wall; and    a rear rotor wall, wherein the swash plate comprises: 
 a front plate wall; and  
 a rear plate wall, wherein: 
 the font rotor wall is a first distance from the front plate wall;  
 the front rotor wall is a second distance from the rear plate wall;  
 the rear rotor wall is a third distance from the front plate wall  
 the rear rotor wall is a fourth distance from the rear plate wall;  
 the first distance is greater than the third distance; and  
 the second distance is greater than the fourth distance.  
 
   
     
     
         6 . The compressor of  claim 5 , wherein when an inclination angle of the swash plate is equal to a maximum inclination angle, the hole is positioned between the rear rotor wall and the front plate wall.  
     
     
         7 . The compressor of  claim 6 , wherein the hole is substantially cylindrical shaped.  
     
     
         8 . The compressor of  claim 6 , wherein the hole is substantially conical shaped.  
     
     
         9 . The compressor of  claim 6 , wherein the hole is perpendicular to the passage.  
     
     
         10 . The compressor of  claim 6 , wherein the hole is slanted relative to the passage.  
     
     
         11 . The compressor of  claim 6 , further comprising a extension pipe, wherein a first portion of the extension pipe is positioned within the bole, and a second portion of the extension pipe is positioned outside the hole.  
     
     
         12 . The compressor of  claim 11 , wherein the first portion is substantially cylindrical shaped.  
     
     
         13 . The compressor of  claim 11 , wherein the first portion is perpendicular to the passage.  
     
     
         14 . The compressor of  claim 11 , wherein the first portion is slanted relative to the passage.  
     
     
         15 . The compressor of  claim 11 , wherein the second portion is substantially cylindrical shaped.  
     
     
         16 . The compressor of  claim 11 , wherein the second portion is substantially conical shaped.  
     
     
         17 . The compressor of  claim 11 , wherein the second portion is perpendicular to the passage.  
     
     
         18 . The compressor of  claim 11 , wherein the second portion is slanted relative to the passage  
     
     
         19 . The compressor of  claim 1 , wherein the hole is formed through the drive shaft.  
     
     
         20 . The compressor of  claim 1 , wherein a center of the hole comprises an opening of the passage.