| abstract |
An apparatus to make a certain volume of liquid available for atomization comprises a container (502) adapted to hold a liquid, and a piston pump (504). The piston pump (504) comprises a piston member (506) and a valve body (510), with the piston member (506) being slidable within the valve body (510). Further, the valve body (510) functions with the piston member (506) to define a metering chamber (523). In this way, the metering chamber (523) is adapted to be filled with liquid from the container (502) when the piston member (506) is moved to a filling position, and the piston pump (504) is adapted to dispense a known volume of the liquid from the metering chamber (523) when the piston member (506) is moved to a dispensing position. |