Abstract: A metering valve used with a pressurized dispensing container, the metering valve has a valve stem assembly that slides co-axially within an annular metering chamber that surrounds the valve stem assembly and forms a substantially cylindrical chamber body. The metering valve also has an outer seal at the top of the cylindrical chamber body and an inner seal at the bottom of the cylindrical chamber body. The valve stem assembly has an outlet and an associated passage that is above the line of the outer seal when the metering valve is at rest, and is below the line of the outer seal when the metering valve is actuated, thereby creating a dispensing passage for the metering chamber's contents. The valve stem assembly has an inlet and an associated passage that is above the line of the inner seal when the metering valve is at rest, and is below the line of the inner seal when the metering valve is actuated.

Abstract: A metering valve for use with a pressurised dispensing container, the metering valve comprising a valve stem assembly co-axially slidable within an annular metering cumber defined between the valve stem assembly and a substantially cylindrical chamber body, the metering naive further comprising an outer seal extending between the valve stem assembly and tome chamber body to seal off an outer duct of the valve stem assembly from the metering chamber when the valve stem assembly is in a non-dispensing position and an inner seal extending between the valve stem assembly and the chamber body. The valve stem assembly comprising a straight, central passage extending from an open inner end of the valve stem assembly to a mid-point of the valve stem assembly located longitudinally within the metering chamber.