Free flow aerosol valves

Details Free flow aerosol valves Free flow aerosol valves

1996-03-08

1998-06-30

Huson, Gregory L.

Dispensing

With discharge assistant

Fluid pressure

222162, B65D 8300

Patent

active

057720851

ABSTRACT:
A metered dose dispensing valve is described that is particularly suitable for dispensing metered volumes of a pressurised aerosol formulation. The valve comprises a chamber, and a valve stem extending into the chamber and movable relative to the chamber between non-dispensing and dispensing positions. The valve stem has a configuration and the chamber has an internal configuration such that a metered volume is defined therebetween and such that during movement between its non-dispensing and dispensing positions the valve stem sequentially: (i) allows free flow of aerosol formulation into the chamber, (ii) defines a closed metered volume for pressurised aerosol formulation between the external surface of the valve stem and internal surface of the chamber, and (iii) moves with the closed metered volume within the chamber without decreasing the volume of the closed metered volume until the metered volume communicates with an outlet passage thereby allowing dispensing of the metered volume of pressurised aerosol formulation.

REFERENCES:
patent: 2772814 (1956-12-01), Meyers
patent: 3126132 (1964-03-01), Lyon et al.
patent: 3176887 (1965-04-01), Potapenko et al.
patent: 3176889 (1965-04-01), Potapenko et al.
patent: 3190508 (1965-06-01), Petersen
patent: 3201081 (1965-08-01), Lyon et al.

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