Apparatus for intravasal injection of gaseous and liquid media

Claim 1

AN INSUFFLATOR COMPRISING, IN COMBINATION, AT LEAST ONE SOURCE OF FLUID TO BE INSUFFATED; A PUMP; MOTOR MEANS COMPRISING AN INFINITELY VARIABLE TRANSMISSION FOR DRIVING THE PUMP AT VARIABLE RATES OF SPEED; VALVE MEANS COMPRISING AT LEAST ONE ADJUSTABLE PLUG; FIRST CONDUIT MEANS FOR CONNECTING THE SOURCE WITH SAID VALVE MEANS; SECOND CONDUIT MEANS FOR CONNECTING SAID VALVE MEANS WITH THE PUMP; THIRD CONDUIT MEANS FOR DELIVERING MEASURED QUANTITIES OF FLUID AT PREDETERMIN PREDETERMINED SAID PUMP INTO A PATIENT''S BODY; AND AN OPERATIVE CONNECTION BETWEEN SAID MOTOR MEANS AND SAID PLUG FOR ADJUSTING THE LATTER WHEREBY TO ALTERNATELY ADMIT FLUID FROM THE SOURCE INTO SAID SECOND CONDUIT MEANS, SAID OPERATIVE CONNECTION COMPRISING A TRANSMISSION DRIVEN BY THE MOTOR MEANS, A DISC ROTATED BY SAID LAST MENTIONED TRANSMISSION, A FOLLOWER ROLLER SWINGABLY MOUNTED ON SAID DISC AND ROTATABLE THEREWITH, A SWINGABLE CAM IN THE PATH OF SAID ROLLER, A GEAR SEGMENT COUPLED WITH SAID CAM, TOOTHED MEANS FIXED TO SAID PLUG AND MESHING WITH SAID SEGMENT FOR MOVING THE PLUG IN ONE DIRECTION WHEN THE CAM IS MOVED BY SAID ROLLER, AND RESILIENT MEANS FOR MOVING THE PLUG IN THE OPPOSITE DIRECTION WHEN THE CAM IS RELEASED BY SAID ROLLER.