Importance

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Abstract

In one embodiment, a canister has a housing closed by a crimped cap and includes a metered valve for dispensing a metered dose of aerosol. A seal is provided between the canister and the body of the metered valve to prevent leakage of the pressurised fluid from within a canister around the valve. The seal is also configured to deform resiliently and admit pressurised fluid continuously into the canister when pressurised fluid is applied to the valve exteriorly of the canister. In this way, the canister can be pressurised with a continuous flow of pressurised fluid from its exterior notwithstanding the metering action of the valve. A liner is disposed around the valve to seal the crimped joint between the housing and the cap, and the fluid that enters the canister can pass unobstructed along passageways past the liner into the housing to fill the canister with pressurised fluid, without substantially deforming the liner, so that the liner maintains a seal between the housing and the cap.

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First Claim