SELF-COOLING BEVERAGE CONTAINER HAVING A HEAT EXCHANGE UNIT USING LIQUID CARBON DIOXIDE AND A TWIST TOP ACTIVATION SYSTEM
A self-cooling container for holding a food or beverage which includes a heat exchange unit (HEU) secured internally thereof so that the food or beverage is in contact with the outer surface of the HEU, the HEU being closed by a frangible membrane which is punctured by a pierce pin when a twist base activator is rotated in a first direction to create dis-equilibrium to cause liquid carbon dioxide contained within the HEU to pass directly from the liquid to the gaseous state and pass through a restricted orifice to atmosphere to cool the food or beverage.
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The present invention relates generally to containers for holding food or beverage in which there is also included a heat exchange unit using liquid carbon dioxide and having an outer surface which contacts the food or beverage and which when activated alters the temperature of the food or beverage.
It has long been desirable to provide a simple, effective and safe device which may be housed within a container such as a food or beverage container for the purpose of altering the temperature of the food or beverage on demand.
In many instances, such as where one is in locations where ice or refrigeration are not readily available such as camping, at the beach, boating, fishing or the like it is desirable to have beverages which can be cooled before consumption. In the past it has been necessary that the individual take an ice chest or the like which contains ice and the containers for the beverages so that they can be cooled and then consumed in the manner desired. The utilization of such ice chests is cumbersome, takes up a substantial amount of space and lasts for only a very limited time after which the ice must be replaced. While in use it is also necessary that the water resulting from the melted ice be drained from the ice chest from time to time.
As a result of the foregoing, there have been numerous instances of attempts to provide a container housing a food or beverage and also housing therein a heat exchange unit which when activated would cool the food or beverage contained therein. The heat exchange units in such prior art devices housed a refrigerant material usually under pressure which when released would absorb the heat in the surrounding food or beverage thereby cooling the same prior to consumption. The refrigerants utilized in the heat exchange units of the prior art included gases under pressure such as hydrofluorocarbons, ammonia, liquid nitrogen, carbon dioxide, and liquid carbon dioxide. There has also been developed a system using compacted carbon particles which adsorb carbon dioxide gas under pressure. When the heat exchange unit is exposed to the atmosphere by opening a valve, the carbon dioxide gas desorbs and cools the food or beverage in the container. Examples of such systems are shown in U.S. Pat. Nos. 7,185,511, 6,125,649 and 5,692,381. Examples of such prior art patents including carbon dioxide in its gas or liquid form is shown by U.S. Pat. Nos. 3,373,581; 4,688,395; and 4,669,273. The containers utilizing such heat exchange units as illustrated in the prior art are complex and difficult to manufacturer, thus causing great expense, rendering such prior art self-chilling beverage containers commercially unattractive. In addition, where liquid carbon dioxide was utilized, the release of the liquid carbon dioxide resulted in the liquid carbon dioxide transitioning into the solid state which provided only limited reduction in temperature of the food or beverage.
Applicant has discovered that by charging the heat exchange unit in such containers with liquid carbon dioxide and then discharging the carbon dioxide through a properly sized restricted orifice, the liquid carbon dioxide passes directly from the liquid to the gaseous state. Such a system was disclosed in PCT/US2015/028318 which is incorporated herein. The system disclosed therein utilized machined metal parts to develop the restricted orifice. As a result, Applicant developed a system utilizing a dual function molded plastic valve to develop the restricted orifice and such is disclosed in PCT/US16/23194 which is incorporated herein. This system was activated utilizing a push button to move the valve into position to cause the liquid carbon dioxide to transition to the gaseous state and exhaust the gaseous carbon dioxide. It was found that some users had difficulty in moving the push button to a position to create the restricted orifice and release the gaseous carbon dioxide. As a result of the foregoing there exists a need for a simple, easy to assemble and efficient self-cooling system for a food or beverage which is easy to activate and less costly to manufacture.
SUMMARY OF THE INVENTIONIn a food or beverage containing assembly comprising an outer container for receiving a food or beverage and having a top and a bottom, the bottom defining an opening therethrough, a heat exchange unit (HEU) including a metallic inner container having an opening and to be filled with liquid carbon dioxide (CO2) and adapted to be secured to the outer container in the opening, a valve means secured to said HEU for providing a restricted orifice having a dimension which, when activated, creates a dis-equilibrium to permit the liquid CO2 to pass directly from the liquid state to the gaseous state but at the same time to maintain the CO2 remaining in the HEU in its liquid state until it is fully exhausted, the improvement comprising a frangible member closing said opening in said HEU, said valve means including a pierce pin and a rotary activation member coupled to said pierce pin to move said pierce pin into contact with said frangible member to rupture the frangible member.
Referring now more particularly to
As indicated above and particularly with reference to the two previously filed PCT patent applications, systems were developed which did provide the desired dimension for the restricted orifice and did in fact function to cause the liquid carbon dioxide to pass directly from its liquid to its gaseous state and exhaust to the atmosphere and cool the food or beverage which was in contact with the heat exchange unit. It was, however, determined that the mechanism which was developed and is disclosed, was manufactured from machined metal parts and also, in one embodiment, the activation mechanism was a push button. As a result of the utilization of the machined metal parts, it was realized that the resulting mechanism was extremely expensive and would not be commercially feasible to produce and in the push button activation, as above noted, it was found that some individuals had a great deal of difficulty in depressing the button sufficiently to activate the restricted orifice and thus provide the ability of liquid carbon dioxide to pass from the liquid to the gaseous state and accomplish the desired cooling. As a result, Applicant redesigned the activating mechanism and the manner in which the restricted orifice was generated and at the same time eliminated the expensive machined parts thereby reducing the overall cost of the device so that it could be commercially developed. The present invention, therefore, is directed to the new structure which utilizes a twist base or rotary activator coupled to a pierce pin to move the pierce pin in such a manner that the frangible member is punctured to create the dis-equilibrium to cause the liquid carbon dioxide to pass directly into the gaseous state and accomplish the desired cooling. The redesign resulted in the structure including molded plastic parts and the only metal being the pierce pin and the heat exchange unit which will be more fully described below.
Referring now more specifically to
As has been described previously, the top 24 of the outer container 12 is closed and includes the typical pop top or lift tab to provide access to the contents 26 within the outer container 12 which may be a food or beverage and, in accordance with the preferred embodiment of the present invention, is a beverage which surrounds the outer surface of the heat exchange unit 14 so that the contents 26 may be cooled to a desired consumption temperature. The outer surface of the heat exchange unit in contact with the beverage is coated with a food grade coating to prevent metal pickup in the food or beverage as disclosed in U.S. Pat. No. 6,105,384 which is incorporated herein by this reference.
Referring now more particularly to
By reference to
The twist base activator 20 is also a molded plastic member formed from fiberglass filled engineering plastic material and includes a downwardly extending activating finger 62 which engages the calibrated pierce plug 56 in order to rotate it when the twist base activator 20 is rotated to cause the pierce plug to move downwardly and pierce the heat exchange unit frangible member 60.
Referring now more particularly to
The outer surface 74 of the top portion 68 of the calibrated pierce plug 56 is a critical dimension and fits within a further critical region 76 of the attachment adapter as shown in
The pierce pin 58 is shown in greater detail in
Referring now more particularly to
Referring now more particularly to
Now, by reference to
Referring now more particularly to
As shown in
To provide a cost savings for the structure as described hereinabove, the heat exchange unit is manufactured from steel utilizing a draw and redraw process allowing a high speed manufacturing process and provides a heat exchange unit of a configuration and volume to receive approximately 90 grams of liquid carbon dioxide. In addition thereto, the heat exchange unit is filled with liquid carbon dioxide and the heat exchange unit frangible member is placed across the opening in the heat exchange unit and is sealed prior to the heat exchange unit being incorporated into the outer container 12. Such is done by placing the formed heat exchange unit in a carbon dioxide pressure atmosphere of the sufficient amount to create the liquid carbon dioxide. Once the heat exchange unit has then been totally filled with the 90 grams of carbon dioxide, the frangible member is placed across the opening of the heat exchange unit and sealed in place and then the pressure atmosphere is opened to atmosphere and the gassed heat exchange unit is removed. The frangible member 60 also provides the function of a burst disc. If the pressure in the HEU becomes excessive, the member 60 will rupture and allow the carbon dioxide to exhaust safely to atmosphere. Through utilization of this type of method for pregassing the heat exchange unit, the overall cost is reduced by about 60%.
To provide the desired restricted orifice as above described, the opening is defined as a H7 g6. The H7 refers to the opening dimension 76 in the neck 38 of the attachment adapter 16 and the g6 refers to a dimension of the outer surface 74 of the calibrated pierce plug. The combination of those two dimensions will provide the annulus of 12 microns through which the gaseous carbon dioxide must pass to then ultimately be exhausted to the atmosphere as above described.
Referring now more particularly to
The assembly of the HEU is shown in greater detail in
To fill the HEU 122 with liquid carbon dioxide, the assembled HEU as shown in
By referring now more particularly to
A support collar 126 carries O-rings 170 and 172. The O-ring 170 prevents the beverage contained within the outer container 120 from contacting the outer surface of the HEU which does not have a protective coating thereon. The O-ring 172 provides a seal to prevent the beverage contained within the outer container 120 from leaving the interior of the container 120.
By referring now to
There has thus been described a modification of a heat exchange unit which has been designed to be activated by a twisting motion as opposed to utilizing a pushbutton type of activation as previously described and which utilizes molded plastic parts as opposed to machined metal parts as also previously described to substantially reduce the manufacturing cost of the system.
Claims
1. In a self-chilling food or beverage container (12) having a heat exchange unit (14) secured to an opening in the bottom thereof and extending into contact with the food or beverage and having a valve mechanism (140-142) for inserting liquid carbon dioxide into the heat exchange unit through an opening therein, the improvement characterized by
- a frangible member (60-150) closing the opening in the heat exchange unit;
- the valve mechanism including a pierce pin system (56, 58-160, 162) disposed adjacent said frangible member;
- a rotary activation member (20-166) coupled to said pierce pin system adapted to rotate only in one direction and, when so rotated, advances said pierce pin into engagement with said frangible member to pierce it to allow liquid carbon dioxide to pass from the liquid state to the gaseous state and exhaust along a flow path; and
- a restricted orifice (75), disposed in said flow path and having a dimension to create a pressure drop that retains any residual carbon dioxide in the heat exchange unit in the liquid state.
2. The improvement in a self-chilling food or beverage container as defined in claim 1 wherein the pierce pin system includes a pierce plug (56-162) and a pierce pin (58-160) carried by said pierce plug and said rotary activation member (70-166) engages said pierce plug to rotate said pierce plug to advance said pierce pin into engagement with said frangible member.
3. The improvement in a self-chilling food or beverage container as defined in claim 2 wherein said pierce plug defines an opening (66) therein and said rotary activation member includes a finger (62) which extends into said opening in said pierce plug to rotate said pierce plug.
4. The improvement in a self-chilling food or beverage container as defined in claim 3 wherein an outer surface (74) of the pierce plug cooperates with a region (76) of an attachment adapter (16) to define said restricted orifice (75).
5. The improvement in a self-chilling food or beverage container as defined in claim 1 wherein said frangible member functions as a burst disk which is in constant contact with the liquid CO2 and will rupture when pressure within the HEU reaches a predetermined level.
6. The improvement in a self-chilling food or beverage container as defined in claim 1 wherein said rotary activation member includes ratchet teeth (94) which cooperate with ratchet legs (98-100) to prevent said rotary activation member from rotating in a direction other than said one direction.
7. The improvement in a self-chilling food or beverage container as defined in claim 1 wherein said rotary activation member includes a downwardly directed outer rim (86) which directs the exhausting CO2 gas flow downwardly along the outer surface of the container (12).
8. The improvement in a self-chilling food or beverage container as defined in claim 1 wherein said heat exchange unit includes a neck portion (28-128) having threads (132) on the outer surface thereof and which further includes an adapter (16-136) threadably secured to said threads on the neck of the HEU to secure the HEU to the bottom of the container.
9. The improvement in a self-chilling food or beverage container as defined in claim 8 wherein the adapter is manufactured from an engineering plastic material comprising a fiberglass filled polyacrylamide or a fiberglass fitted polyoxymethylene or a acrylonitrile butadiene styrene (ABS).
10. The improvement in a self-chilling food or beverage container as defined in claim 8 wherein said rotary activation member (20-166) includes a downwardly directed flange (88) having an inwardly directed wedge-shaped lip which secures the rotary activation member to the adapter.
11. The improvement in a self-chilling food or beverage container as defined in claim 8 which further includes a frangible member holder and a grub screw (152) which secures the frangible member in place in the holder.
12. The improvement in a self-chilling food or beverage container as defined in claim 11 which further includes a sealing member seated between the frangible member holder and the bottom of the adapter (136) to maintain the liquid carbon dioxide in the HEU in an equilibrium state.
13. The improvement in a self-chilling food or beverage container as defined in claim 12 wherein the adapter is hollow and further includes a valve stem (142) disposed in the hollow interior of the adapter and a spring urging the valve stem to a position to urge the frangible member into a sealing position, the valve stem being movable against the force of the spring to move the frangible member holder away from the bottom of the adapter to allow liquid carbon dioxide to be inserted into the HEU.
14. The improvement in a self-chilling food or beverage container as defined in claim 11 wherein said grub screw includes an opening therein through which the pressure in the HEU is communicated to the frangible member, the opening in the grub screw being dimensioned to throttle the pressure of released gaseous carbon dioxide in the event the frangible member ruptures as a result of increased pressure in the HEU.
15. The improvement in a self-chilling food or beverage container as defined in claim 8 which further includes a HEU support collar (126) surrounding the neck portion (128) of the HEU and seated against the HEU at one end thereof and against the bottom of the container at the other end thereof for securing the HEU to the container.
Type: Application
Filed: Jun 13, 2017
Publication Date: Oct 3, 2019
Applicant: JOSEPH COMPANY INTERNATIONAL, INC. (Irvine, CA)
Inventor: MARK SILLINCE (West Sussex)
Application Number: 16/308,308