EP3978391A1 — Canister and valve

USPTO Abstract

The propellants used in aerosol canisters can be harmful to the environment. The present invention relates to an aerosol canister (1') for dispensing a product and propellant, and to a product metering valve for use with the aerosol canister (1'). The canister (1') includes a high pressure chamber (3) for containing a liquefied or compressed gas propellant, a low pressure chamber (52) for containing a gas propellant, and a product reservoir (54) for containing a gas propellant. A pressure regulating valve (9) is interposed between the high pressure chamber (3) and the low pressure chamber (52), the pressure regulating valve (9) adapted to provide a fluid flow path from the high pressure chamber (3) to the low pressure chamber (52) when the pressure in the low pressure chamber (52) drops below a predetermined pressure. The canister further comprises a partition wall (56) interposed between the low pressure chamber (52) and the product reservoir (54).