2. Background Art In general, a commonly used PET bottle containing carbonic beverage in which a carbonic acid gas melts is capped by a bottle cap opened or closed by turning it around, thus it is possible to open and close the PET bottle even without an opener and to drink the beverage with desired quantity several times. Such a conventional PET bottle has. a merit to drink the beverage in it every favorite time.

However, there is a problem that an efflux of carbonic acid gas contained in the beverage can not be perfectly

cut off after the bottle is opened once. As a result, with time elapsing, the carbonic acid gas melt in the beverage vaporizes gradually, which makes it impossible to maintain a unique tangy taste of the carbonic beverage.

3. Disclosure of Invention It is a primary object of the present invention to provide a beverage container's gas refilling device capable of re-injecting carbonic acid gas etc. freely into a beverage container even after the beverage container is opened once.

To achieve the object, the present invention provides a beverage container's gas refilling device including a gas storing part in which compressed drinkable gas is filled up, and a gas injection part equipped on an pierced hole of a beverage container, for injecting selectively the compressed gas into the container to fill up, wherein the gas injection part is composed of: an injection adjusting module for adjusting an influx path, which is formed in the gas storing part, of the compressed gas to the container; and a control module for controlling the injection adjusting module to open the influx path.

A beverage container equipped with the present gas refilling device consists of: a beverage container filled with beverage; a gas storing part filled with compressed

drinkable gas; an injection adjusting part for adjusting an influx path of the compressed gas to the inside of the container; and a gas injection part for controlling the injection adjusting part to open/close the influx path and to inject selectively the compressed gas into the container and filling up the container.

The beverage container's gas refilling device configured as above is installed upper part of a cap or outside of a beverage container. Under such an installment, when the cap of the beverage container is once opened and then closed, the gas such as carbonic acid gas etc. melt in the beverage is gasified by time elapsing. After then, if a user manipulates the control module to open the influx path which has been blocked by the injection adjusting module, the compressed gas filled in the gas storing part in a high pressure state is injected inside the beverage container. As a result, the drinkable gas such as the carbonic acid gas. can be provided repeatedly into the beverage.

4. Brief Description of Drawings The accompanying drawings, which are included to provide a further understanding of the invention, illustrate the preferred embodiment of this invention, and together with the description, serve to explain the

principles of the present invention.

In the drawings: FIG. 1 illustrates an embodiment of the present gas refilling device fixed upper part of a cap of a beverage vessel; and FIG. 2 illustrates another embodiment of the present gas refilling device fixed outer part of a beverage vessel.

5. Modes for Carrying out the Invention The preferred embodiments of the present invention will be described below referring to the accompanying drawings.

FIG. 1 shows an embodiment of the beverage container's gas refilling device fixed on an upper part of a cap of a beverage vessel. The beverage vessel shown in FIG. 1 includes a beverage vessel 100 filled with carbonic beverage; a bottle cap 200 for preventing the beverage in the beverage vessel 100 from flowing out; a gas storing part 300 equipped in an upper part of the bottle cap 200, the gas storing part 300 containing high-pressure carbonic gas to be injected into the beverage vessel 100; an injection adjusting rod 400 whose the edged terminal 400a is inserted into an injecting aperture 300a formed in the gas storing part 300, for opening or closing the injecting aperture 300a through which the gas passes into

the vessel 100; and an injection controlling part 500 made from strong elastic material accompanying with the injection adjusting rod 400, for controlling the injection adjusting rod 400 to adjust the opening extent of the injecting aperture 300a.

FIG. 2 describes another embodiment of the inventive beverage container's gas refilling device. In the embodiment of FIG. 2, a specific influx aperture 100a is formed on one side of the beverage vessel 100 and the gas refilling device is installed on the influx aperture 100a.

An operation of the embodiments according to the present beverage container's gas refilling device is as follows.

Drinkable gas injected into the beverage vessel 100 is filled up to be in high pressure inner space of the gas storing part 300. The injection adjusting rod 400 interlinked to the injection controlling part 500 moves back and forth based on the pressure applied to the injection controlling part 500. The injecting aperture 300a is closed by the edged terminal 400a of the injection adjusting rod 400 when no pressure is applied to the injection controlling part 500. The injecting aperture 300a is aligned with the influx aperture 100a formed on the one side of the vessel 100.

If a user opens the bottle cap 200 to drink the beverage and then closes, the gap between the cap 200 and mouth of the vessel 100 causes the gas to outflow towards the outside no matter how tightly the cap 200 is closed.

As time elapses, the gas contained in the beverage such as the carbonic acid gas etc. may flow out through the efflux path of the gap gradually. Therefore, a specific tangy taste of the carbonic beverage will be lost with no recharge of the gas.

On this occasion, if the injection controlling part 500 made from the elastic material is pressed down by a user's finger, it will be pushed in the direction of pressure force as shown in FIG. 2. As a result, the injection adjusting rod 400 formed from the center to lower part of the injection controlling part 500 moves to the inner side of the vessel 100 when one presses the injection controlling part 500, and then the edged terminal 400a of the injection adjusting rod 400 slides out from the injecting aperture 300a, which allows the injecting aperture 300a of the gas storing part 300 to open.

The high-pressure drinkable gas filled in the gas storing part 300 begins to flow out through the injecting aperture 300a, and such outflown drinkable gas, in the

embodiment of FIG. 1, flows out directly through the bottle cap 200 and inside the beverage vessel 100, and then it melts in the beverage, and in the embodiment of FIG. 2, it flows out through the influx aperture 100a and into the beverage. Such a gas refilling enables the beverage in the vessel 100 to be recharged with sufficient carbonic acid gas.

The injection controlling part 500 is made from the strong elastic material such as rubber, thus if the user lets off his finger pressing on the injection controlling part 500, the injection controlling part 500 returns to the initial shape due to its elasticity, and simultaneously the injection adjusting rod 400 moves backward, which causes the edged terminal 400a to slide into and block the injecting aperture 300a not to refill the vessel 100 with the gas any more. Later, if the injected carbonic acid gas is evaporated, the above operation is repeated to re-inject the carbonic acid gas into the vessel 100.

In the above-mentioned embodiments, by controlling the pressure force on the injection controlling part 500, it is possible to adjust an opening extent of the injecting aperture 300a and to control the quantity of the gas injected into the beverage vessel 100. Meantime, the

present invention may also be equipped with another device capable of adjusting an opening diameter of the injecting aperture 300a to control the quantity of the injection gas or may utilize various devices to adjust the quantity of the gas injected.

In addition, the gas injection apparatus could be installed not only in an upper part of the bottle cap 200 or one side of the vessel 100 as in the embodiments of FIGS. 1 and 2, but in any other desired position of the vessel 100.

As mentioned above, the inventive beverage container's gas refilling device can refill the carbonic acid gas into the container whenever a user wants even after the container once opened. Consequently, that a specific taste of the carbonic beverage can be always maintained is highly evaluated.

The foregoing is provided only for the purpose of illustration and explanation of the preferred embodiments of the present invention, so changes, variations and modifications may be made without departing from the spirit and scope of the invention.