Resuscitator

Claim 1

A RESUSCITATOR FOR RENDERING ARTIFICIAL RESPIRATION TO A VICTIM AT THE NORMAL BREATHING RATE OF AN OPERATOR COMPRISING: A RESUSCITATOR CYLINDER HAVING A MAIN AIR EXCHANGE CHAMBER OF A VOLUME OF ONE TIDAL BREATH OR APPROXIMATELY 550 CC.; AN OPERATOR MOUTHPIECE OPENING INTO SAID MAIN AIR EXCHANGE CHAMBER ATTACHED TO ONE END OF SAID RESUSCITATOR CYLINDER; A FACE MASK ATTACHED TO THE OTHER END OF SAID RESUSCITATOR CYLINDER AND ADAPTED TO FIT A VICTIM; A VICTIM INHALATION PASSAGE IN SAID RESUSCITATOR CYLINDER INTERCONNECTING SAID MAIN AIR EXCHANGE CHAMBER AND SAID FACE MASK; A FRESH AIR INLET PASSAGE IN SAID RESUSCITATOR CYLINDER OPENING INTO SAID MAIN AIR EXCHANGE CHAMBER AND EXTERNALLY OF SAID RESUSCITATOR CYLINDER; A VICTIM EXHALATION PASSAGE EXTENDING THROUGH SAID RESUSCITATOR CYLINDER AND OPENING INTO SAID FACE MASK AND EXTERNALLY OF SAID RESUSCITATOR CYLINDER; A VALVE CHAMBER FORMED IN SAID RESUSCITATOR CYLINDER, SAID VALVE CHAMBER COMMUNICATING WITH SAID FRESH AIR PASSAGE AND SAID VICTIM INHALATION AND EXHALATION PASSAGES; AND A FREELY MOUNTED, RECIPROCABLE SLIDE VALVE POSITIONED IN SAID VALVE CHAMBER ADAPTED TO BE MOVED BY PRESSURE CHANGES IN SAID RESUSCITATOR CYLINDER OPERATING ON SAID SLIDE VALVE INDUCED BY AND AT THE NORMAL RATE OF SAID OPERATOR BREATHING INTO SAID MOUTHPIECE, WHEREBY UPON INHALATION OF SAID OPERATOR THE AIR PRESSURE IN SAID MAIN AIR EXCHANGE CHAMBER IS LOWERED, CAUSING SAID SLIDE VALVE TO MOVE AND OPEN SAID FRESH AIR AND VICTIM EXHALATION PASSAGES WHILE CLOSING SAID VICTIM INHALATION PASSAGE TO FILL SAID MAIN AIR EXCHANGE CHAMBER WITH FRESH AIR, SAID MOVEMENT OF SAID SLIDE VALVE UPON INHALATION OF SAID OPERATOR BEING ASSISTED BY THE ELASTICITY OF THE VICTIM''S LUNGS, AND UPON EXHALATION OF SAID OPERATOR SAID AIR PRESSURE IN SAID MAIN AIR EXCHANGE CHAMBER IS INCREASED TO MOVE SAID SLIDE VALVE AND CLOSE SAID FRESH AIR PASSAGE AND SAID VICTIM EXHALATION PASSAGE AND OPEN SAID VICTIM INHALATION PASSAGE, FORCING TIDAL BREATHS OF AIR FROM SAID MAIN AIR EXCHANGE CHAMBER THROUGH SAID VICTIM INHALATION PASSAGE INTO SAID MASK AT THE NORMAL BREATHING RATE OF SAID OPERATOR, AND STOP MEANS FOR LIMITING THE MOVEMENT OF SAID SLIDE VALVE.