Medicinal spray device

Abstract

Abstract A DEVICE FOR PRODUCING FROM A PRESSURE VESSEL A PREDETERMINED SPRAY CHARGE CONTAINING AN INHALANT MEDICINE AND A PRESSURIZING AEROSOL, THE VESSEL COMMUNICATING WITH A METERING CHAMBER WHICH, IN TURN, COMMUNICATES WITH A NOZZLE TUBE LOCATED WITHIN AN EJECTION TUBE INTENDED TO BE PLACED IN SUCTION INDUCING RELATION WITH A PATIENT''S MOUTH OR NOSE. A FIRST VALVE CONTROLS FLOW INTO THE METERING CHAMBER AND A SECOND VALVE ATTACHED THERETO CONTROLS FLOW THROUGH THE NOZZLE TUBE AND THE EJECTION OR SUCTION TUBE. THE FIRST VALVE IS MANUALLY OPERATED TO CAUSE A PREDETERMINED QUANTITY OF THE MEDICINE-AEROSOL FLUID TO FILL THE METERING CHAMBER. A PISTON OF LARGE AREA SUPPORTS THE NOZZLE TUBE AND IS OPERABLE, IN RESPONSE TO SUCTION APPLIED BY THE PATIENT TO THE DISCHARGE TUBE, TO CLOSE THE FIRST VALVE AND OPEN THE SECOND VALVE AND THEREBY CAUSE DELIVERY OF THE MEDICINE-AEROSOL CHARGE TO THE PATIENT''S MOUTH OR NOSE SIMULTANEOUSLY WITH INHALATION. BY MEANS OF A THIRD VALVE, THE METERING CHAMBER MAY ALSO COMMUNICATE MOMENTARILY WITH A CHAMBER CLOSED BY THE PISTON AT ITS SIDE OPPOSITE FROM THE SIDE EXPOSED TO SUCTION PRESSURE SO AS TO SUPPLEMENT THE FORCE EXERTED BY THE PATIENT.

Inventors

• 👤 Paul J Ciranna

Bibliographic Details