US Patent 7213347 Metering material to promote rapid vaporization

Apparatus for vaporization of powdered or granular material, includes a container for holding powdered or granular material having at least one component; a vaporization structure; and a positive displacement mechanism spaced from the vaporization structure defining a chamber for receiving powdered or granular material from the container, and delivering such powdered or granular material to the vaporization structure, the positive displacement mechanism defining an orifice for delivering powdered or granular material from the chamber to the vaporization structure, an actuable member movable in first and section directions into the orifice and back from the orifice to be spaced therefrom for driving powdered or granular material from the chamber through the orifice for delivery to the vaporization structure and a vibratory diaphragm for fluidized material in the chamber between the actuable member and the orifice.