Portable artificial respirator

Claim 1

A PROTABLE ARTIFICAL RESPIRTOR CONSTITUTING ONE SINGLE UNIT TO BE MANIPULATED BY HAND BY ONE SINGLE PERSON AND ADAPTED TO BE DIRECTLY TIED TO THE FACE OF THE PERSON BEING RESUSCITATED, COMPRISING TWO TUBULAR BELLOWS HAVING CORRUGATED WALLS OF ELEASTIC MATERIAL BOTH CLOSED AT THEIR ENDS BY A SINGLE UPPER AND SINGLE LOWER PLATE, A FIRST FREE PICTH VALVE AND A FIRST GRADUATED VALVE IN SAID UPPER AND LOWER PLATES RESPECTIVELY FOR ADMITTING FRESH AIR TO AND FROM ONE BELLOWS, A SECOND FREE-PITCH VALVE AND A SECOND GRADUATED VALVE IN SAID UPPER AND LOWER PLATES RESPECTIVELY FOR ADMITTING FOUL AIR TO AND FROM SAID OTHER BELLOWS, SAID FIRST AND SECOND GRADUATED VALVES SERVING TO LIMIT POSITIVE AND NEGATIVE AIR PRESSURE IN BOTH BELLOWS, A DISH-SHAPED COVER UNDERLYING AND SECURED TO SAID LOWER PLATE, SAID COVER PROVIDING A CHAMBER COMMUNICATING WITH SAID GRADUATED VALVES, A MASK FOR SECUREMENT TO THE MOUTH OF A PERSON TO BE RESUSCIATATED REMOVABLY SECURED TO SAID COVER WITHOUT AN INTERVENING HOSE, SAID MASK AND COVER HAVING COMMUNICATING PASSAGEWAYS, SAID MASK INCLUDING AN ELASTIC THIN MEMBRANE FORMING A PART OF ITS WALL WHICH IS RHYTHMICALLY MOVABLY BY THE AIR PRESSURE DIFFERENCES TO PERMIT OBSERVATION AND CONTROL OF THE WORKING AIR PRESSURE WITHIN THE MASK, AND A HANDLE AFFIXED TO THE UPPER PLATE FROM MANUALLY PUMPING THE BELLOWS.