Simulated cigarette device

1. A simulated cigarette device comprising:

an elongate housing having a main axis, an inhaling outlet at one end, and a refill inlet,

a reservoir extending along a substantial portion of the housing and having a refill valve adjacent to the refill inlet and an outlet valve adjacent to the inhaling outlet, which is operable to allow gas from the reservoir to pass from the reservoir and out of the inhaling outlet;

an air flow passage into the housing downstream of the reservoir and leading to the inhaling outlet, the air flow passage is open to fluid communication with the inhaling outlet when the outlet valve is closed, and

a valve opening mechanism having a rotatable valve rotatable about an axis perpendicular to the main axis, associated with the air flow passage and arranged to open the outlet valve as air is sucked through the air flow passage.

2. A device according to claim 1 , wherein the rotatable valve comprises a plurality of elements positioned to be acted on by air flowing through the air flow passage.

3. A device according to claim 2 , wherein the elements are positioned such that they are not within a path of the gas from the reservoir.

4. A device according to claim 1 , wherein the rotatable valve is biased closed such that it closes when air stops flowing through the air flow passage.

5. A device according to claim 1 , wherein the rotatable valve has an opening, the rotatable valve being rotatable from a first position in which the opening is out of alignment with an outlet flow passage from the reservoir to the inhaling outlet such that the outlet flow passage is closed by the rotatable valve, and a second position in which the opening is aligned with the outlet flow passage to open the outlet flow passage, wherein the valve opening mechanism comprises at least one vane in the air flow passage attached to the rotatable valve and being arranged to rotate the rotatable valve to the second position while air is sucked through the air flow passage.

6. A device according to claim 5 , wherein a set of vanes is provided.

7. A device according to claim 5 , wherein there is a set of vanes at each end of the rotatable valve.

8. A device according to claim 2 , wherein the plurality of elements comprise a pair of pivotally mounted plates, each of which is positioned partly within the air flow passage and partly within an outlet flow passage, the plates being rotatable from a first position in which the plates meet one another to seal the outlet flow passage to a second position in which the plates are separated to open the outlet flow passage, the plate plates being arranged to rotate to the second position to open the outlet valve as air is sucked through the air flow passage.

9. A device according to claim 8 , wherein the plates are biased to the first position to hold the rotatable valve closed when not in use.

10. A device according to claim 8 , wherein portions of the plates which are in the outlet flow passage are generally perpendicular to the remainder of the plates.

11. A device according to claim 8 , wherein edges of the plates which meet one another in the first position are resilient to ensure a good seal.

12. A simulated cigarette device comprising:

an elongate housing having an inhaling outlet at one end and a refill inlet;

a reservoir extending along a substantial portion of the housing and having a refill valve adjacent to the refill inlet and an outlet valve adjacent to the inhaling outlet, which is operable to allow gas from the reservoir to pass from the reservoir and out of the inhaling outlet;

an air flow passage into the housing downstream of the reservoir and leading to the inhaling outlet; and

a valve opening mechanism having a rotatable valve associated with the air flow passage and arranged to open the outlet valve as air is sucked through the air flow passage, wherein the rotatable valve comprises a plurality of elements positioned to be acted on by air flowing through the air flow passage, wherein the plurality of elements comprise a pair of pivotally mounted plates, each of which is positioned partly within the air flow passage and partly within an outlet flow passage, the plates being rotatable from a first position in which the plates meet one another to seal the outlet flow passage to a second position in which the plates are separated to open the outlet flow passage, the plates being arranged to rotate to the second position to open the outlet valve as air is sucked through the air flow passage, wherein the plates are biased to the first position to hold the rotatable valve closed when not in use, and wherein portions of the plates which are in the outlet flow passage are generally perpendicular to the remainder of the plates.