Patent ID: 8408427

Claim:
A single dose nasal spray pump comprising: a reservoir configured for holding a single dose of material to be dispensed, the reservoir extending between a permanently closed end and an open end; a cap to be configured to be disposed over the open end of the reservoir, the cap including an aperture; a stem extending between an outlet end and lower end, the stem having a conduit extending from the outlet end of the stem to a conduit inlet at or adjacent to the lower end of the stem; and a piston disposed about the stem and configured for movement between a first position wherein the piston seals or substantially seals the conduit inlet and a second position wherein the piston does not substantially seal the conduit inlet; wherein the stem is configured for movement from a first stem position wherein the piston is disposed in the reservoir in the first piston position and a second stem position wherein the stem is moved toward the closed end of the reservoir such that the piston is moved into the second piston position.