Device for preserving beverages

1. A closure element for a container for a liquid, the container having a neck, a neck opening, and an outer edge to the neck opening, the closure element comprising

a stopper configured to engage the neck opening of the liquid container; and

a cap configured to cover the edge of the neck opening,

said stopper comprising an inlet channel passing therethrough and an outlet channel, wherein the inlet channel and the outlet channel are respectively provided with an inlet valve and an outlet valve, wherein each valve is configured as a pressure relief valve,

wherein said stopper comprises a stopper base comprised of an elastomer, the stopper having at least one sealing lip on its outer circumference, the stopper forming a sealing body of the inlet valve, and the sealing body is deflectable by applied overpressure so as to open the inlet valve,

wherein the cap comprises a substantially central inlet opening in connection with the inlet channel for attaching or connecting a protective gas source,

wherein the cap comprises an annular outlet opening located radially outside the central inlet opening and communicating with the outlet channel,

wherein the outlet channel, via at least one radial bore, opens into an outlet chamber communicating, via the outlet opening, outside of the liquid container.

2. The closure element according to claim 1 , wherein the inlet valve and the outlet valve are operable independently of each other.

3. The closure element according to claim 1 , wherein the sealing body comprises a sleeve that is radially expandable by applied overpressure, wherein the sealing body surrounds a mandrel into whose surface at least one bore of the inlet channel opens, whereby overpressure applied to the bore radially expands the sealing body.

4. The closure element according to claim 1 , wherein the inlet channel opens eccentrically into the container opening or the neck of the container.

5. The closure element according to claim 1 , wherein the inlet channel comprises an eccentrically disposed end portion protruding from the stopper.

6. The closure element according to claim 1 , wherein the central inlet opening, the annular outlet opening, or both the central inlet opening and the annular outlet opening are formed in a cap base body connected to the stopper.

7. The closure element according to claim 1 , wherein at least one portion of the outlet channel is formed in an insert inserted in a recess of the stopper.

8. The closure element according to claim 7 , wherein the insert forms the protruding end portion of the inlet channel.

9. The closure element according to claim 7 , wherein the insert comprises an outlet valve.

10. The closure element according to claim 1 , wherein the outlet channel includes an inflow opening, and the inlet channel includes a mouth, wherein the inflow opening is disposed eccentrically or diametrically to the mouth of the inlet channel.

11. The closure element according to claim 1 , wherein the closure element further comprises two retaining clamps pivotally fastened to the cap.

12. A device for preserving liquids in the household with the aid of a protective gas, comprising

at least one handheld device connectable to, or comprising, a gas reservoir and said at least one hand held device having its own valve alternatively releasing or retaining the protective gas in order to respectively release or retain the discharge of the protective gas from a discharge-side end of the handheld device, and said handheld device having a nozzle for controlling the gas flow, and

further comprising the container closure according to claim 1 .

13. The device according to claim 12 , wherein the valve of the handheld device comprises an actuating member designed as a valve member displaceable against the force of a spring or cooperating therewith.

14. The device according to claim 13 , wherein the container closure further comprises a protruding mandrel in the region of the inlet opening, wherein the protruding mandrel displaces the actuating member of the valve of the handheld device when placing the discharge-side end of the handheld device to the inlet opening and thereby opens the valve of the handheld device.

15. The device according to claim 12 , wherein the inlet valve and the outlet valve of the closure element, and the valve of the handheld device, close automatically when removing the handheld device from the container.

16. The closure element according to claim 6 , wherein the stopper has a base body, and the cap base body is connected by being plugged into the stopper base body.

17. The closure element according to claim 7 , wherein the insert is plugged into a recess of the stopper base body.

18. A closure element for a container for a liquid, the container having a neck, a neck opening, and an outer edge to the neck opening, the closure element comprising

a stopper configured to engage the neck opening of the liquid container; and

a cap configured to cover the edge of the neck opening,

said stopper comprising an inlet channel passing therethrough and an outlet channel, wherein the inlet channel and the outlet channel are respectively provided with an inlet valve and an outlet valve, wherein each valve is configured as a pressure relief valve,

wherein said stopper comprises a stopper base comprised of an elastomer, the stopper having at least one sealing lip on its outer circumference, the stopper forming a sealing body of the inlet valve, and the sealing body is deflectable by applied overpressure so as to open the inlet valve,

wherein the container for a liquid comprises a bottle,

the closure element is configured for the bottle;

the inlet valve and the outlet valve are operable independently of each other;

the sealing body comprises a sleeve that is radially expandable by the applied overpressure;

the inlet channel opens eccentrically into an opening of the bottle or the neck of the bottle;

the inlet channel comprises an eccentrically disposed end portion protruding from the stopper;

the cap comprises a substantially central inlet opening in connection with the inlet channel for attaching or connecting a protective gas source;

the cap comprises an annular outlet opening located radially outside the inlet opening and communicating with the outlet channel; and

the outlet channel, via at least one radial bore, opens into an outlet chamber communicating with the environment via the outlet opening.