1. Field of the Invention
The present invention is directed to a food warmer and, in particular, a portable device for warming food in its original container.
2. Discussion of the Related Art
There has long been a need for warming a consumable item, e.g., food and beverages, quickly and easily. For instance, travelers on road trips have often desired eating or drinking warm food and drink without having to stop and prolong the length of their travels. In particular, truck drivers and recreational vehicle operators have often sought to eat and drink on the go.
One such way in which travelers have accomplished the eating or drinking of a warm beverage has been to use thermally insulated containers and/or cups. This, of course, requires the user to stop at a location, such as a truck stop, and use a microwave, stove, oven or other heating device to warm the food and/or beverage. These methods suffer from a number of disadvantages. First, these methods require that the user stop along their route to heat their food or beverage. This is not always convenient, as it may be several miles between truck/rest stops. Accordingly, a user may have to heat his or her food and beverage long before or after it is actually desired. Further, it increases the user's travel time in that the user must make a separate stop to warm the food or drink. This method also potentially creates additional waste in the instance where the user uses a disposable container or cup to heat his or her food. Alternatively, if the user uses a reusable container, it requires that the user subsequently clean the reusable container prior to subsequent use. Obviously, this is another time-consuming process as the user must wait until he or she reaches a rest area, such as a truck stop to clean his or her container, oftentimes in a bathroom ill equipped for cleaning such items. It additionally requires that the user carry or provide his or her soap for thoroughly cleaning the container so as to prevent the accumulation of potentially harmful bacteria and the like.
In light of the foregoing, it has been known to utilize in-vehicle heating units. Such heating units commonly utilize either the electrical output of the vehicle's cigarette lighter or piggyback off the heating and cooling system of the vehicle. Such heating units typically include a heating element configured to receive a specialized container within a cavity such that the heating element is held in close contact with the specialized container. Thus, as desired, the user fills the specialized container with his or her desired food or beverage and plugs the unit into the cigarette lighter adapter of the vehicle. These units are typically quite simple in construction and do not comprise on/off switches or thermostats for monitoring and regulating the temperature of the contents of the container. Thus, the user has no way of knowing when the food or beverage has been heated to a satisfactory temperature. As such, the user may be burned by a food or beverage that has been overheated or may consume a food or beverage that has not been thoroughly heated. Finally, the specialized container requires that it be cleaned in between uses, which results in a number of disadvantages already discussed herein.
Thus, it has become desired to provide a device for heating a food or beverage without the foregoing disadvantages. One such way that is commonly employed is the use of a heating box in which a soup container or the like may be simply placed inside the cavity of the box. The box is interconnected with the cigarette lighter adapter, as before, such that a heating element of the box warms the cavity thereof to thereby heat the food or beverage in the container. Again, this device suffers from a number of disadvantages. In particular, known devices do not incorporate a thermostat for monitoring and regulating the temperature of the cavity of the box. Thus, it is possible for the contents of the container to be over or under heated. In the case of overheating, it is possible that the container may explode or even catch fire if allowed to heat too long. This presents a rather serious safety issue especially when used while traveling as the user may become injured by an exploding container thus impairing his or her ability to drive his or her vehicle and thereby expose other drivers on the road to dangerous driving conditions. Finally, in known cigarette adapter devices like the heating box and the specialized container device discussed previously, a great deal of the vehicle's electrical resources is expended. This may lead to a number of disadvantages in performance of the vehicle, and is particularly disadvantageous in cases where the user, such as truck drivers or recreational vehicle drivers, is traveling great distances.
In light of the foregoing, it is desired to provide a device for heating a food or beverage in its original container while additionally being able to regulate the temperature of the contents to ensure thorough but not excessive heating thereof. Additionally, it is desired to provide a device that is relatively simple to use and which requires a minimal amount of cleaning and maintenance. In addition, it is desired to provide a device that creates a minimal amount of additional waste. Further, it is desired to provide a device, which requires a minimal amount of electrical power to operate so as to not adversely affect operation of the vehicle. Finally, it is desired that the device be constructed so as to operate in a safe manner and in accordance with highway safety and other such safety regulations.
The device of the present invention is a food and beverage warming device that is configured to heat a food or beverage in its original store-bought container, such as soup in its original container or can, using the cigarette adapter of a vehicle. The device is configured to operate at or below 12 Volts, such that operation of the vehicle is not adversely impacted in a meaningful manner. Further, the device includes a heat regulation means, such as a thermostat, that is configured for monitoring and regulating the heating elements of the device to ensure thorough warming of the contents of the can but also preventing overheating thereof.
Thus, in one embodiment of the invention, a food and beverage warming device is provided that includes a housing having a circumferential sidewall, a bottom wall, and an opening opposite the bottom wall in which the sidewalls and bottom wall serve to define a cavity. A container is configured to be securely received within the cavity. The container is generally sized and shaped to receive a can of a food or beverage. A thermostat and a heating element are mounted to an exterior of the container's sidewall. The thermostat and heating element are operably coupled to one another such that the thermostat is capable of selectively energizing or de-energizing the heating element. Thus, the food and beverage warming device is prevented from overheating while ensuring that it reaches a temperature sufficient for consumption of a warmed food or beverage. Further, the food and beverage warming device allows for the food or beverage to be safely heated in its original container such that no additional waste is created.
An indicator light may be provided on an exterior of the food and beverage warming device to indicate the status of the heating element. In particular, the indicator light may be illuminated when the heat element is being energized, i.e., applying heat to the container, and it may be turned off when the heat element is de-energized. Alternatively, the light may be used to indicate when the food has reached the optimal temperature for consumption. One or more additional indicator lights may be provided for carrying out one or more of the foregoing aspects of the invention.
The housing of the food and beverage warming device is preferably constructed from a plastic or other non-conductive material such that it may be easily and safely carried by the user even when the contents have been thoroughly heated. Further, the housing may include a handle for grasping by the user.
A gap may be provided between an inside surface of the housing and an outside surface of the cylindrical container received within the housing. The gap serves as a thermal break between the container and the housing to provide a heat sink.
The container may be constructed from aluminum or another similarly conductive material such that the heating element may easily transfer heat through the walls of the container to the can of food or beverage inside the container.
A lid may be provided over the opening of the housing. The lid serves to trap heat inside the housing to prevent escape through the opening to improve the efficiency thereof Further, it provides a safety mechanism to prevent a user from accidentally contacting the can or container while it is being heated.
These and other aspects and objects of the present invention will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following description, while indicating preferred embodiments of the present invention, is given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications.
In the Drawings:
The present invention and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments described in detail in the following description.
Referring now to the drawings, and initially to
A handle 24 is integrally formed with sidewall 14 of the housing 12. Handle 24 is generally sized and shaped to accommodate a user's hand as is generally understood. Handle 24 generally may have a sideways U-shape or any other such shape capable of accommodating the user's hands therethrough. Handle 24 may further include a number of gripping surfaces or grooves 26 formed in a surface thereof for receiving the user's fingers. Housing 12, lid 22, and handle 24 may be constructed from a plastic such as polypropylene or other similar such materials having similar characteristics. In this manner, food and beverage warming device 10 is relatively lightweight but is also substantially durable. Handle 24 may be disposed at or near the rear of the food and beverage warming device 12, or it may be positioned anywhere around the circumference thereof in keeping with the spirit of the invention.
A power input or connection 28 is provided on an external surface of sidewall 14. Power connection 28 is preferably a coaxial 12-volt DC power jack as is generally understood in the art, although a number of alternative types of power connections may be utilized in practicing the food and beverage warming device 10 of the invention. The power connection 28 may be nickel plated or may include any number of other plating materials sufficient to carry out invention. In one embodiment, the connection 28 accepts plugs having a 5.5 mm outer diameter and a 2.1 mm inner diameter, although alternative constructions are contemplated. For instance, the power connection 28 may comprise a standard electrical outlet plug configured to be interconnected with a power cord and a standard wall outlet or the like. Power connection 28 is interconnected with internal electrical circuitry as will be explained in detail herein. In this way, power connection 28 may be interconnected with, for instance, a cigarette lighter adapter of a vehicle or a similar such electrical connection such that power is relayed to the electrical circuitry to power the food and beverage warming device 10, as can be readily appreciated.
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Rings 34, 38 may be constructed from a Garolite material or similar such phenolic, as is generally understood. The rings 34, 38 preferably have a thickness of approximately 3/16 of an inch and serve to position a generally cylindrical container 42 that is received in the cavity. In particular, the two retaining rings 34, 38 receive the container 42 through the central holes thereof. The rings 34, 38 are configured to snugly receive the container 42 such that a tight-fitting connection is made between the rings 34, 38 and the container 42. Container 42 may have any shape desired and is not necessarily limited to being cylindrical. Moreover, container 42 may have a shape dissimilar from that of the housing 12.
Container 42 is constructed from aluminum or a similarly conductive material. Container 42 is sized and shaped similarly to housing 12. Container 42 includes a circumferential sidewall 44, a bottom wall 46 and an opening 48 opposite the bottom wall 46 for receiving a can as will be explained in detail. In a preferred embodiment, a gap is provided between sidewall 44 and an interior wall of housing 12 to serve as a thermal break therebetween to provide a heat sink.
A thermostat 52 may be provided on the outer surface of sidewall 44 of container 42. Thermostat 52 is configured to monitor and regulate the temperature of the container 42. Thermostat 52 is interconnected between the power source, e.g., a vehicle cigarette lighter adapter and a heating element 54 of the food and beverage warming device 10 to ensure that the temperature of the food and beverage warming device 10 does not exceed a predetermined temperature. In one embodiment, the thermostat 52 is configured to ensure that the temperature within cavity 20 does not exceed 185 degrees Fahrenheit. In another embodiment, thermostat 52 is configured to prevent the temperature of food and beverage warming device 10 from exceeding between exceeding 185 degrees Fahrenheit or falling below approximately 145 degrees Fahrenheit. Specifically, thermostat 52 is configured such that when a desired temperature is reached, the power to the heating element 54 is shut off such that the food and beverage warming device 10 does not overheat and that when the temperature falls below a predetermined temperature, power is restored to the heating elements to make sure that the contents of food and beverage warming device 10 do not become too cool for consumption. Depending on the ambient air temperature, the cycling on and off of the heating element may occur approximately every two minutes. Accordingly, food and beverage warming device 10 is configured to not only provide a food or beverage item that is of a preferred temperature, but it also ensures that food and beverage warming device 10 does not reach unsafe temperatures in which the can of food and beverage warming device 10 may explode or start on fire.
Heating element 54 is coupled to the external wall of sidewall 44. Heating element 54 may be a 12-volt, 60 Watt silicon rubber heat strip like the kind manufactured by Electro-Flex Heat Inc. Alternatively, heating element 54 may be another similar type of heating element. Heating element 54 may be coupled to the sidewall 44 by way of an adhesive backing or the like or by way of a fastener or any other suitable type of connector. The heating element 54 is electrically operably interconnected with the power source via power connection 28. In particular, heating element 54 is wired to the power input 28 such that the heating element 54 is electrically powered so as to provide heat to the container 42 as is generally understood. As discussed previously, heating element 54 and power input 28 are also in operable communication with the thermostat 52 such that when the thermostat detects a temperature above or below a given threshold, the power input 28 energizes or de-energizes the heating element 54.
Food and beverage warming device 10 is capable of use and operation in a wide number of locations. In particular, food and beverage warming device 10 is capable of use in a vehicle while traveling. In this manner, the user of food and beverage warming device 10 can warm a can of soup or similar such food or beverage item while they travel so that they can eat while traveling.
In operation, the user of food and beverage warming device 10 inserts a can of food such as soup, spaghetti, or a similar such can of food or a can having a beverage to be heated, such as coffee, tea, water, or broth. The can is inserted into the container 42 unopened such that the contents may be warmed while still in the can. The can is received snugly within container 42 such that heat transfer may occur from the container 42 to the can. The lid 22 is then placed over opening 18 to improve the efficacy of the heat transfer and prevent undesired heat loss through the opening of the housing 14. The food and beverage warming device 10 is then interconnected with a power source such as a cigarette lighter adapter in the vehicle. This may be accomplished via a coaxial power cable or similar such power connector. Once connected to the power source, thermostat 52 of food and beverage warming device 10 begins to monitor the temperature of container 42. As long as the temperature of container 42 is below a maximum predetermined temperature, for example, 185 degrees Fahrenheit, the thermostat allows the heating element 54 to be energized by the power source via the electric circuitry of the food and beverage warming device 10. While the heating element 54 is being energized, illuminating member 30 is illuminated to convey to the user that the container 42 is being warmed. After the container 42 reaches the predetermined maximum temperature, the thermostat sends a signal to the heating element to de-energize the heating element 54. Once the heating element 54 is de-energized, the illuminating member 30 is shut off to indicate to the user that the food and beverage warming device 10 is no longer being warmed. When the container 42 reaches a predetermined minimum temperature, for instance, 145 degrees Fahrenheit, the thermostat sends a signal via the food and beverage warming device's electrical circuitry to energize the heating element 54. This process is continually repeated over a period of approximately two minutes depending on the ambient temperature where the heating is taking place. In this manner, food and beverage warming device 10 is configured to prevent the can from being overheated and potentially exploding while still being able to keep the contents thereof at a desirable temperature for consumption.
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Food and beverage warming device 210 of the present embodiment includes a base 250 coupled to bottom 216. Base 250 is configured to allow the food and beverage warming device 210 to be securely held in a standard cup holder of a vehicle, e.g., having a diameter of approximately 6 cm or 2.5 inches. In this manner, food and beverage warming device 210 is maintained substantially stable within the cup holder to prevent accidental spilling. Base 250 may be constructed from the same material comprising housing 212. Base 250 includes a number of teeth 251 around an upper edge thereof for engaging bottom 216 of housing 212 to secure base 250 thereto. Bottom 216 preferably comprises a plurality of corresponding receivers (not shown) adapted for selective engagement with teeth 251 as can be readily understood.
Food and beverage warming device 210 further includes a pair of apertures 252 or slots in the handle 224 of housing 212. Understandably, apertures or slots 252 may be located elsewhere on the housing 212. Handle 224 includes a number of recesses or grooves 226 as in the previous embodiment for receiving a user's fingers. The apertures 252 are configured to securely hold an eating utensil 254, such as a spoon, fork, or a combination thereof. The apertures 252 are also configured to secure a can opener 256. Can opener 256 may be constructed from plastic, metal, or any other suitable material as is readily appreciable. Apertures 252 may comprise alternative sizes and shapes to accommodate a variety of different utensils or attachments. Further, apertures 252 could comprise a single aperture 252 or a plurality of additional apertures 252 in keeping with the spirit of the present invention.
Utensil 254 of the invention is preferably configured to cooperate with the can 221. In particular, utensil 254 includes a blunt, flat front edge that is configured to aid the user in scraping food from can 221. In this way, the user is able to easily remove the contents from a standard can 221 much more easily than in using a standard spoon having rounded edges that are not adapted to cooperate with a cylindrical can 221. Utensil 254 may be constructed from a plastic, metal, or any other material sufficient for carrying out the invention. Utensil 254 is preferably reusable, and it may be cleaned after use for subsequent reuse. Alternatively, utensil 254 may be disposable.
In one alternative embodiment, can 221 may comprise a reusable can that is configured to selectively receive food or beverages. In this manner, the food and beverage warming device 210 may be used to heat items that would not necessarily be sold in a conventional soup can-sized container. Accordingly, food and beverage warming device 210 is capable of heating a plurality of different foods and beverages that would not otherwise be possible. For instance, can 221 may be used to heat a hot dog or similar food item. Reusable can 221 is preferably constructed from stainless steel or a similar material.
Further, it can be readily appreciated that the food and beverage warming devices 10, 110, 210 according to the present invention may comprise a number of alternative designs in keeping with the invention. For instance, housings 12, 112, 212 may include additional gripping surfaces or it may be specifically contoured to receive a user's hand around a part thereof. In addition, housings 12, 112, 212 may include additional foam or similar such material around the outside thereof for providing a comfortable grip and/or additional insulation. A number of alternative features may be incorporated into the housing as well.
It is intended that the appended claims cover all such additions, modifications and rearrangements. Expedient embodiments of the present invention are differentiated by the appended claims.
The present application claims the benefit of priority to U.S. Provisional Patent Application Ser. No. 61/362,779 filed on Jul. 9, 2010 and titled Can Warmer, the entirety of which is hereby expressly incorporated by reference thereto.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US2011/043381 | 7/8/2011 | WO | 00 | 3/25/2013 |
Number | Date | Country | |
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61362779 | Jul 2010 | US |