Method for creating an air pressure

Abstract

This invention provides a method of creating air pressure by generating a source of air pressure greater than atmosphere air pressure from a first rotary screw compressor. The first rotary screw compressor has a first displacement and is driven by a first power source. The generated source of air pressure from the first rotary screw compressor is directed to a second rotary screw compressor having a second displacement which is less than the first displacement and which is driven by a second power source which is independent of the first power source. The generated air pressure from the second rotary screw compressor driven by the second power source is greater than 200 psi.

I claim:  
     
         1 . A method for creating an air pressure comprising: 
 (a) generating a source of air pressure greater than atmosphere air pressure from a first rotary screw compressor having a first displacement and which is driven by a first power source;    (b) directing the generated source of air pressure greater than atmosphere air pressure to a second rotary screw compressor having a second displacement which is less than the first displacement and which is driven by a second power source which is independent of the first power source; and    (c) generating an air pressure greater than 200 psi from the second compressor driven by the second power source.    
     
     
         2 . The method as recited in  claim 1  further comprising cooling and removing water from the source of air pressure greater than atmosphere before it is directed to the second rotary screw compressor.  
     
     
         3  The method as recited in  claim 2  further comprising passing the source of air pressure greater than atmosphere through a separation system prior to cooling and removing water from the source of air pressure greater than atmosphere.  
     
     
         4 . A method for creating an air pressure comprising: 
 (a) generating a plurality of sources of air pressure each greater than atmosphere air pressure from a plurality of first rotary screw compressors in which together all of the first rotary screw compressors combined have a total first displacement and in which each first compressor is driven by its own first power source;    (b) directing the generated sources of air pressure greater than atmosphere air pressure to a second rotary screw compressor having a second displacement which is less than the total first displacement and which is driven by a second power source which is independent of the first power source; and    (c) generating an air pressure greater than 200 psi from the second compressor driven by the second power source.    
     
     
         5 . The method as recited in  claim 4  further comprising cooling and removing water from the sources of air pressure greater than atmosphere before it is directed to the second rotary screw compressor.  
     
     
         6 . The method as recited in  claim 5  further comprising passing the source of air pressure greater than atmosphere through a separation system prior to cooling and removing water from the source of air pressure greater than atmosphere.  
     
     
         7 . A method for creating an air pressure of at least 500 psi comprising: 
 (a) generating a first air pressure of at least 167 psi;    (b) cooling the first air pressure of at least 167 psi to remove moisture and to cool the first air pressure;    (c) providing a rotary screw compressor with a 3:1 or less discharge to suction compression ratio having its own lubrication system and a power source; and    (d) using the rotary screw compressor to increase the cooled first air pressure to at least 500 psi.    
     
     
         8 . A method as recited in  claim 7  wherein the power source is an engine of a carrier.