System and apparatus for refilling a reservoir with liquid dispensed from a dispenser
The present invention solves some of the problems of the prior art by providing a method, system and apparatus for readily refilling the reservoir of a smoking-substitute device with liquid from a dispenser. The method, system and apparatus of the present invention prevents liquid from being dispensed until the dispenser is securely and sealably engaged to the smoking-substitute device, provides independent liquid and gas pathways between the dispenser and reservoir, and substantially alleviates the problems of spillage and/or leakage when dispensing liquid from the dispenser into the reservoir of the smoking-substitute device.
1. A system for transferring liquid between a dispenser and a reservoir comprising:
a coupling assembly for securably and sealably engaging said dispenser to said reservoir, the coupling assembly moveable between an unsecured and closed position in which liquid and gas communication is restricted between a dispenser outlet and a reservoir inlet and a reservoir outlet and a dispenser inlet, and a secured and open position in which the coupling assembly opens a liquid communication pathway between said dispenser and said reservoir through the dispenser outlet and reservoir inlet; and
wherein the coupling assembly opens a gas communication pathway between said reservoir and atmosphere through the reservoir outlet and a vent in the coupling assembly;
wherein the coupling assembly includes a male component and a female component configured and arranged to be fully engaged with one another, the male component including a plunger guide with an inwardly extending portion at a distal end thereof, and the female component including a cylinder with an inner side wall having a groove extending longitudinally therein, and a collar circumferentially extending within the cylinder;
the plunger guide configured and arranged to extend into the cylinder, engage the inwardly extending wall portion with the collar, and thereby force the collar back against a spring;
the gas communication pathway is formed between the inwardly extending portion of the plunger guide and the collar of the female component and extends through the groove in the cylinder of the female component to an external atmosphere.
2. The system according to claim 1 , wherein the coupling assembly simultaneously opens said liquid communication pathway; and
wherein the vent extends between the male and female components of the coupling assembly, and the female component of the coupling assembly is not the reservoir.
3. The system according to claim 1 , wherein the coupling assembly is adapted to close both the liquid communication pathway and the gas communication pathway as it is moved away from the secured position to disengage the dispenser and reservoir.
4. The system according to claim 1 , wherein, in the open position, the system is operable to permit liquid to be transferred through the liquid communication pathway, and for a substantially equivalent volume of gas to be expelled through the gas communication pathway.
5. The system as claimed in claim 4 , wherein, in the open position, the system is configured and arranged to maintain a substantially equal pressure in the dispenser and reservoir.
6. The system according to claim 1 , wherein said dispenser outlet comprises a valve that is actuable when the coupling assembly is secured in the open position to open said liquid communication pathway between said dispenser and said reservoir.
7. The system according to claim 1 , wherein said reservoir outlet comprises a valve that is actuable when the coupling assembly is secured in the open position to open said gas communication pathway between said reservoir and dispenser.
8. The system as claimed in claim 7 , wherein the valve is biased to close the gas communication pathway when the coupling assembly is not secured in the open position.
9. The system according to claim 1 , wherein the coupling assembly comprises a guide assembly for guiding movement of the dispenser outlet into the secured and open position.
10. The system according to claim 1 , wherein the coupling assembly comprises a male member, and a female member configured for securely and removably receiving said male member.
11. The system according to claim 1 , wherein the coupling assembly comprises a bayonet-type arrangement.
12. A coupling assembly comprising:
a dispenser including a dispenser inlet and dispenser outlet;
a reservoir including a reservoir inlet and a reservoir outlet; and
a coupler positioned between and engaging with the dispenser and the reservoir, the coupler configured to transfer liquid between the dispenser and the reservoir by moving between
an unsecured and closed position in which liquid and gas communication is restricted between the dispenser outlet and the reservoir inlet and the reservoir outlet and the dispenser inlet, and
a secured and open position in which the coupler opens a liquid communication pathway between the dispenser and the reservoir through the dispenser outlet and the reservoir inlet and opens a first gas communication pathway between the reservoir and an atmosphere through the reservoir outlet and a vent in the coupler;
wherein the coupling assembly further includes a male component and a female component configured and arranged to be fully engaged with one another, the male component including a plunger guide with an inwardly extending portion at a distal end thereof, and the female component including a cylinder with an inner side wall having a groove extending longitudinally therein, and a collar circumferentially extending within the cylinder;
the plunger guide configured and arranged to extend into the cylinder, engage the inwardly extending wall portion with the collar, and thereby force the collar back against a spring;
wherein the first gas communication pathway is formed between the inwardly extending portion of the plunger guide and the collar of the female component and extends through the groove in the cylinder of the female component to an external atmosphere.
13. The coupling assembly of claim 12 , wherein the female component of the coupling assembly is not the reservoir.
14. The coupling assembly of claim 13 , wherein the coupler is further configured to close both the liquid communication pathway and the first gas communication pathway as the coupler is disengaged from the dispenser and the reservoir.
15. The coupling assembly of claim 13 , wherein the coupler is further configured in the secured and open position to permit liquid to be transferred through the liquid communication pathway, and for a substantially equivalent volume of gas to be expelled through the first gas communication pathway.
16. The coupling assembly of claim 12 , wherein the coupler is further configured in the secured and open position to maintain a substantially equal pressure in the dispenser and the reservoir.