Nozzle assembly for liquid droplet based interproximal cleaner

An oral care cleaning apparatus adapted for successive single uses for cleaning teeth using liquid droplets, comprising:

• a reservoir of compressed gas (12);
• a reservoir of liquid (14);
• a gas chamber (26) separate from the reservoir of compressed gas and a one-way metered valve (22) for selectively holding and permitting a selected amount of compressed gas for a single cleaning use into the gas chamber from the compressed gas reservoir;
• a liquid chamber (34) separate from the reservoir of liquid to which an amount of liquid is moved from the reservoir of liquid, including a connecting line therefrom;
• a one-way valve (38) connecting the gas chamber and the liquid chamber, such that when the compressed gas in the compressed gas chamber, expanding as it leaves the one-way metered valve, reaches a certain pressure, the one-way connecting valve opens, permitting a small amount of compressed gas from the selected amount of compressed gas into the liquid chamber to move a single use of liquid therein along the connecting line (15) from the liquid chamber;
• a gas line (13) separate from the connecting line extending from the gas chamber, terminating in an exit orifice (16), wherein the connecting line connects with the gas line prior to the exit orifice, resulting in a stream of liquid droplets for a single use when the amount of liquid encounters a remainder part of the selected amount of compressed gas in the gas line, the resulting stream of liquid droplets exiting from the gas line at the exit orifice;
• and
• a control member which when operated permits a single use of gas to move into the one-way metered valve and then into the gas chamber and also results in a single use of liquid being moved into the liquid chamber.