Booster-type compressor

Abstract

A compressed gas is introduced into a casing. A piston pivotally connected to a reciprocating mechanism moves up and down in a cylinder. The compressed gas in the casing is sent to a space on the piston through a groove formed in the inner circumference of the cylinder and is further compressed in the space by the piston.

1 . A booster-type compressor comprising: 
 a cylinder;    a casing having a compressed-gas supply tube through which a compressed gas is introduced into the casing;    a piston moving up and down in the cylinder, a gas-guiding groove being formed in a lower part of an inner circumference of the cylinder to allow the compressed gas to move into a space from the casing on the piston via the gas-guiding groove between an outer circumference of the piston and the inner circumference of the cylinder when the piston moves down, the compressed gas being prevented from flowing into the space when the piston moves up to further compress the compressed gas; and    a reciprocating mechanism for moving the piston up and down.    
   
   
       2 . The booster-type compressor of  claim 1  wherein the reciprocating mechanism comprises a crank shaft pivotally mounted to a piston rod fixed to the piston; and a drive shaft integrally connected to the crank shaft and driven by a power source.  
   
   
       3 . The booster-type compressor of  claim 1  wherein a discharge check valve is provided in a wall of the cylinder to allow the compressed gas to go out of the space in the cylinder.  
   
   
       4 . The booster-type compressor of  claim 3  wherein the discharge check valve is opened only when the compressed gas is further compressed by the piston.  
   
   
       5 . The booster-type compressor of  claim 1  wherein the compressed gas comprises an inert gas.  
   
   
       6 . The booster-type compressor of  claim 5  wherein the inert gas comprises N 2 .