Blower

Claim 1

A ROOTS BLOWER WHICH COMPRISES: A PISTON CHAMBER HAVING INLET MEANS AND OUTLET MEANS, ROTARY PISTONS ROTATABLY MOUNTED IN SAID PISTON CHAMBER AND OPERABLE PERIODICALLY AND SUCCESSIVELY TO DRAW THE MEDIUM TO BE COMPRESSED THROUGH SAID INLET MEANS INTO CONVEYING CHAMBERS CONFINED BY WALL PORTIONS OF SAID PISTONS AN THE RESPECTIVE ADJACENT WALL PORTIONS OF SAID PISTON CHAMBER AND TO COMPRESS BETWEEN SAID PISTONS THE MEDIUM CONVEYED THEREBETWEEN BY SAID PISTONS AND TO DISCHARGE THE THUS COMPRESSED MEDIUM THROUGH SAID OUTLET MEANS, AUXILIARY RESONANCE CHAMBER MEANS, A SOURCE OF PRESSURE MEDIUM OF THE SAME TYPE AS IS TO BE DELIVERED BY SAID BLOWER AND AT A PRESSURE ABOUT THE SAME AS IS DEVELOPED BY THE BLOWER, PIPE MEANS CONNECTING SAID SOURCE WITH SAID AUXILIARY RESONANCE CHAMBER MEANS, SAID PIPE MEANS BEING SO DIMENSIONED AND ARRANGED AS TO BE OSCILLATION FREE, AND CONDUIT MEANS RESPECTIVELY LEADING FROM SAID AUXILIARY CHAMBER MEANS INTO SAID PISTON CHAMBER AND SO LOCATED AS TO COMMUNICATE WITH THE RESPECTIVE CONVEYING CHAMBER ONLY AFTER THE CONVEYING CHAMBER IS SHUT OFF BY THE RESPECTIVE PISTON FROM SAID INLET MEANS AND WHILE THE CONVEYING CHAMBER IS STILL SEPARATED FROM SAID OUTLET MEANS BY THE RESPECTIVE PISTON WHEREBY PRESSURE MEDIUM FROM SAID AUXILIARY CHAMBER PASSES INTO SAID CONVEYING CHAMBER AND INCREASES THE PRESSURE IN THE CONVEYING CHAMBER TO REDUCE PULSATIONS IN THE MEDIUM DISCHARGED FROM THE BLOWER.