Patent ID: 8444397

Claim:
An attenuating apparatus for use with a positive displacement compressor, comprising: a bore formed in a housing of the compressor, the bore being positioned at an angle to a discharge chamber of the compressor and in fluid communication with the compressor discharge chamber; a plug positioned within the bore, the plug movable after installation within the bore to a preselected position, the plug having a first end in contact with a gas from the compressor discharge chamber and a second, opposite end being accessible from an exterior of the housing; a seal positioned between the plug and the bore to seal an interface between the plug and the bore to prevent leakage of the gas from the compressor discharge chamber along the interface; the plug being lockable within the bore at the preselected position; wherein the preselected position of the plug within the bore determines a bore length in fluid communication with the compressor discharge chamber, the preselected position of the plug determining the bore length that attenuates sound from gas pulsations resulting from discharge of compressed gas from the operation of the compressor.