Unit dose dispensing device
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United States of America Patent
Stats
-
Feb 13, 2001
Grant Date -
N/A
app pub date -
Jan 29, 1999
filing date -
May 10, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A device for dispensing a unit dose of substance comprises a nozzle assembly (2) including a container (24) housing a unit dose of the substance, and an outer body (4) to which the nozzle assembly (2) is releasably attached. The body (4) includes a system actuable to effect discharge of the substance from the nozzle assembly (2) and actuating means operably by a user to effect discharge. Preferably the discharge system comprises a spring-loaded air piston (68) actuable to inject air into the container (24) to cause discharge of the substance. In one embodiment a driving spring for the air piston is loaded with spring energy by the action of installing the nozzle assembly on the body, the driving spring thereafter being held in a cocked state until operating of the actuating means by the user to effect release of the spring energy to cause discharge.
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