Patent ID: 6220242
Filing Date: 2001-04-24
Classification: A61M

Abstract:
In a vaporizer for use with a liquid source and a carrier gas source, said vaporizer having a first inlet adapted for connection to said liquid source and a second inlet adapted for connection to said carrier gas source, and a vaporizing chamber wherein liquid from said liquid source is vaporized, as vaporized liquid, in carrier gas from said carrier gas source, the improvement, comprising:flow path defining structure for creating a flow path communicating with said first inlet and an interior of said vaporizing chamber, said flow path being adapted to contain liquid received from said liquid source;an adjustable liquid flow valve disposed in said flow path;a flow meter disposed in said flow path which generates an output signal proportional to a flow of said liquid in said flow path before vaporization of said liquid; anda controller operably connected to said flow meter and receiving said output signal therefrom and operably connected to said valve for operating said valve to regulate a supply of said liquid in said flow path from said first inlet to said interior of said vaporizing chamber dependent on said signal from said flow meter.