Pressurised refill canister with an outlet valve

1. A combination of a canister, and a simulated cigarette to be refilled, the refill canister comprising:

A reservoir of composition including a propellant and a non-metered refill outlet valve comprising a stem displaceable from a first position to which it is biased by a first resilient member having a spring force of at least 10N when no external force is applied to a dispensing position against the action of the first resilient member,

the stem comprising blind bore open at an outlet end and closed at the opposite end and a lateral bore in the side wall of the stem leading to the blind bore,

the refill outlet valve further comprising an annular seal which surrounds the stem whereby, in the first position, the lateral bore is not in communication with the inside of the canister, and in the dispensing position, the lateral bore is arranged to move inside the canister with respect to the seal to open a flow path from the inside of the canister via the lateral bore and along the blind bore to the outlet end,

the simulated cigarette comprising: a reservoir with a fill valve and an outlet valve,

the fill valve comprising a valve element and a seat to receive the outlet end of the stem of the refill outlet valve of the canister,

the valve element projecting into the seat and being displaceable from a closed position in which it closes the fill valve of the simulated cigarette by the biasing force of a second resilient member having a spring force which is less than the spring force of the first resilient member into an open position in which the valve element is displaced by the stem of the refill outlet valve of the canister inserted into the seat of the fill valve element to open a vent flow path around the valve element and around the outside of the stem of the refill outlet valve of the canister,

the stem being arranged such that further pressure urging the simulated cigarette and canister together causes the stem to land in the seat of the fill valve and the refill outlet valve to open, thereby creating a flow path from the canister into the simulated cigarette reservoir.

2. A combination according to claim 1 , wherein a portion of the seat facing the stem has a generally part spherical surface which is complementary with the outermost edge of the stem.

3. A combination according to claim 1 , wherein both the stem and the seat have parallel sided portions which are complementary to one another.

4. A combination according to claim 3 , wherein the length of the overlap of the parallel sided portions when fully mated with one another extends for less than 8 mm.

5. A combination according to claim 1 , wherein the pressure differential between the first and second resilient members in their unstressed state is 15N.

6. A combination according to claim 1 , wherein the refill reservoir pressure, the dimensions of the flow path and the capacity of the reservoir of the simulated cigarette to be filled are such that, with the refill canister and the simulated cigarette to be filled fully engaged, the device reservoir will fill in less than 10 seconds.

7. A method of using a combination according to claim 1 , to refill the simulated cigarette, the method comprising the steps of pressing the simulated cigarette against the stem of the outlet valve with a first force to open the simulated cigarette fill valve against action of the second resilient member to vent the simulated cigarette reservoir via a path between the stem and the seat; and increasing the force with which the simulated cigarette seat is pressed against the stem to overcome the force of the first resilient member to open a flow path from the refill canister into the simulated cigarette reservoir and disengaging the simulated cigarette from the stem to close the refill outlet valve and simulated cigarette fill valve.