Patent ID: 7021561

Claim:
A spray device, comprising: a tubular body including an internal surface and first and second open ends, first and second spaced stoppers in said tubular body sealingly engaging said internal surface of said tubular body and moveable within said body, a fluid between said first and second stoppers and a substance between said second stopper and said second open end of said tubular body, said tubular body having a bypass between said second stopper and said second open end, and a spray nozzle on said second open end having a spray port, whereby movement of said first stopper toward said second open end of said tubular body moves said second stopper to adjacent said bypass causing said fluid to flow between said second stopper and said second open end mixing said fluid with said substance, continued movement of said first stopper drives said first stopper against said second stopper, and continued movement of said first stopper drives the mixture of fluid and substance through said spray nozzle, creating a spray suitable for inhalation by a patient, said spray nozzle permitting fluid under pressure in said tubular body to flow from said tubular body, and preventing unpressurized fluid in said tubular body from flowing from said tubular body.