Portable beverage preparation device and system

A portable beverage preparation device and system for making brews, mixes, and potions on demand by selectively introducing and mixing predetermined quantities of at least one stored, edible, beverage preparation confined in at least one sealed chamber into a portable beverage container containing a predetermined volume of a potable base liquid and having a dispenser means for introducing the at least one beverage preparation into the potable base liquid; wherein the drink container and the at least one sealed chamber are in close physical proximity to each other and separated by at least one thin membrane which, when inwardly perforated by the dispenser means, introduces the at least one beverage preparation into the base liquid. The system of the invention further provides a brewing element and a portable heating unit, the heater element of which fits into the beverage container for heating the liquid.

FIELD OF THE INVENTION

The present invention is related to the field of beverage preparation devices and systems, and in particular, to a portable beverage preparation device and system for making brews, mixes, and potions on demand by selectively introducing and mixing predetermined quantities of stored, edible, beverage preparations into a portable beverage container containing a predetermined volume of a potable base liquid.

BACKGROUND OF THE INVENTION

People enjoy drinking cold and hot beverages at all times, and especially while on the go. Coffee, tea, and other hot drinks of all types are very popular all year around. Children and babies enjoy cold or hot milk, often with a chocolate or other flavor added. In the morning, hot drinks such as coffee, are preferred by many adults.

In order to have this coffee for the morning commute, a person either has to be up early to prepare the coffee in his home, or prepare it the night before and keep it hot in a thermos type container. As society becomes increasingly mobile, the morning routine is disturbed and a person either goes without a morning drink or must wait until he or she is at school or work to prepare a favorite beverage for him or herself, if there is time. Hot instant teas and soups require heating facilities, whether at the office or at home and cannot easily be prepared while in a car. Thermos bottles filled with coffee prepared from the night before may supply the needs of some people for a drink, but such coffee is usually not very hot and not as tasty as when freshly brewed.

As the sophistication for coffee increases, people now enjoy more sophisticated coffee drinks as their morning coffee, such as espressos, and other espresso-based drinks, such as lattes, cappuccinos, and the like. Espresso must be consumed while fresh, and at high temperatures, to preserve the quality and taste. Accordingly, preparation of an espresso or espresso-based drink before the morning commute or other automobile trip, typically requires additional preparation time, that people may not have if they are pressed for time. Additionally, in many areas, there may not be any outlets for purchasing an espresso or espresso-based drink to be enjoyed at rest-stops along the way. Finally, even if an espresso or espresso-based drink can be purchased on the road, it may be of low quality, stale, and in a disposable cup that cannot preserve the high heat required to keep the drink hot and tasty.

Although many cold drinks are on the market, they generally have the disadvantage of requiring refrigeration to maintain their cool temperature. Until use, many drinks must be kept in a refrigerator. Furthermore, if the drinks are already mixed, their shelf-life is limited. Many cold drinks and mixes are packaged in containers that do not allow people on the go to add ingredients, such as sweeteners or flavors, to suit the individual taste of the consumer. Disposal of commonly used drink containers, such as bottles, metal cans, and even plastic, is often complicated when traveling by the need to find a recycling bin or a place to claim a refund on a deposit. Usually, discouraged consumers will simply throw away the container, hopefully in a waste receptacle, but not always. If some residue of the drink remains in the container, it can cause unnecessary and unsightly environmental and sanitation problems by spilling-over and attracting insects and rodents.

Thus, it would be desirable to provide a broad choice of prepared beverages, both cold and hot, which are freshly made, at reasonable cost, and with minimum effort, according to taste and preference of the consumer.

SUMMARY OF THE INVENTION

Accordingly, it is a principal object of the present invention to overcome problems associated with beverage preparation and provide a portable beverage preparation device and system for preparing both cold mixed drinks and hot brewed beverages.

In accordance with a preferred embodiment of the present invention, there is provided a portable beverage preparation device comprising:a drink container containing a predetermined volume of a potable base liquid;at least one beverage preparation of a predetermined quantity;at least one sealed compartment for confining said beverage preparation; anda dispenser means for introducing said at least one beverage preparation into said base liquid within said drink container;

wherein said drink container and said at least one sealed compartment are in close physical proximity to each other and separated by at least one thin membrane which, when inwardly perforated by said dispenser means, introduces said at least one beverage preparation into said base liquid.

In the preferred embodiment, the portable beverage preparation device and system can prepare both cold mixed drinks and hot brewed beverages, and prepare potions and remedies involving addition of edible ingredients to a potable, base liquid, such as treated water. These additives, in the form of ready-to-mix ingredients, such as powders and concentrates, are provided in one or more separate chambers or chambers in communication with a portable beverage preparation device comprising a container, such as a cup, a baby bottle, a medicine bottle, and the like. The chambers storing the ready-to-mix ingredients are disposed in physical proximity to the container and, in accordance with various embodiments of the invention, are external or internal to the body of the container, such as on a side or bottom. In another embodiment of the invention, the chamber is fabricated as an element of the cover, or cap of the container For example, in one embodiment of the invention, a sealed cup is provided with at least one, over-the-cover, protruding chamber for holding edible ingredients. In another embodiment of the invention, the chamber is embedded in the handle of the container.

Furthermore, the portable beverage preparation device of the invention is conveniently provided with a built-in dispenser means for introducing the beverage preparation into the potable base liquid. There is no need to open a container to mix the ingredients and spills are avoided. In one embodiment of the invention, small openings are provided in the sealed container cover allowing for the insertion of a drinking straw, alternatively, a consumer can choose to sip the drink from a convenient lip-size mouthpiece built into the cover.

The chamber may be any shape or combination of shapes and configurations and the number of such chambers is only limited by the surface space available, but in one preferred embodiment of the invention, the shape is accordion-like. In another embodiment of the invention, it is dome-shaped, or bubble-shaped. Finger pressure on any of the chambers selects the ingredients of that chamber and bursts a foil seal between the inward-facing surface of the selected chamber and the cup, dispensing the ingredients into the potable liquid stored therein. After shaking the cup to mix the ingredients with the liquid, the drink is ready to consume.

The container of the portable beverage preparation device, such as a cup, in a preferred embodiment of the invention, is disposable together with any remaining ingredients stored in the chambers.

The container may be made of any suitable material, as is known to those skilled in the art, but in a preferred embodiment of the invention, the drinking container is made of plastic.

Optionally, in another embodiment of the system of the invention, a portable heater unit is provided with the portable container to heat the beverage for on-demand brewing of a hot beverage, for example, espressos, coffees, teas, and soups. Commonly, these beverages and drinks may be consumed with little waiting time since they are easy to prepare. They can also be taken with to work or school and prepared in a break period. Using the lighter socket in a car for power, the drinks may be prepared hot or to taste. All the necessary ingredients are self-contained and fresh. The beverage drinks may also be prepared while camping, vacationing or traveling far from home. By brewing a beverage in a motor vehicle while at a rest stop, or at home, the consumers have a freshly brewed or mixed drink whenever wanted, with little preparation time and effort.

Alternate embodiments of the invention provide for the mixing of a refreshing, favorite cold drink, such as chocolate milk, iced tea, and the like. In the embodiment of the invention for providing hot brewed beverages, the system operates by heating small quantities of liquid, for example, treated water, in a continuous cycle. These small quantities are typically heated to boiling or thereabout, with small amounts of power. The heated liquid is forced (injected) by pressure into contact with a beverage preparation in a pocket or other holder. Once through the pocket, the now formed beverage flows into a receiving chamber in a cup. This process is repeated for a desired number of cycles to prepare the desired beverage. When all desired beverage has been produced, the system can be deactivated, with the cup separated from the remainder of the system so that the produced beverage can be enjoyed.

For hot brewed beverages, the portable beverage preparation device further comprises a heating unit including a heater element configured for fitting within a cup unit. The heater element includes a chamber for holding liquid (for example, water), at least one heat activated valve for sealing the chamber to confine a predetermined volume of fluid in the sealed chamber, a heater rod extending into the chamber (which may also be used for making a cold drink on the Peltier principle), and a tube in communication with the chamber. The chamber is configured for heating a portion of the liquid to at least boiling to produce pressure in the chamber for pushing liquid through the tube. Upon exiting the tube, the hot water typically floods at least one beverage preparation confined in a small compartment or pocket and the hot liquid is forced out and falls or flows directly into an outer cup for collection and to make the ready-to-drink beverage.

There is also disclosed a portable beverage brewing system of a cup unit and a brewing element. The cup unit includes an inner cup and an outer cup, the inner cup spaced apart from the outer cup so as to define a chamber for holding liquid between these cups. The brewing element is configured for fitting on the inner cup and this brewing element is configured for holding at least one beverage preparation and configured for the passage of a base liquid through it. The cup unit, and in particular the inner cup, includes a potable liquid, prepackaged therein, that can be, for example, treated water.

There is further disclosed a portable beverage brewing system of a cup unit, with separable inner and outer cups, and a brewing element. The brewing element fits on the inner cup, is configured for holding beverage preparations and is also configured for the passage of fluid therethrough, and including an outlet proximate to the periphery of the inner cup. The cup, and in particular the inner cup, includes liquid, prepackaged therein, that can be for example, treated water. The brewing element is provided as either a fixed or replaceable element.

Also disclosed is a method (process) for preparing a beverage. This method includes providing a brewing element containing a beverage preparation therein, continuously heating quantities of approximately 15 milliliters (ml) of liquid to at least boiling, and pressurizing the heated liquid to force it into and out of the brewing element. The continuous heating typically lasts until all of the liquid in the inner cup has been exhausted.

Also disclosed is another method for preparing a beverage drink comprising:providing a drink container containing a predetermined volume of a potable base liquid;providing at least one sealed chamber containing a predetermined quantity of at least one beverage preparation;providing a dispenser means for introducing said at least one beverage preparation into the potable base liquid;
wherein the drink container and the at least one sealed chamber are in close physical proximity to each other and separated by at least one thin membrane which, when inwardly perforated by the dispenser means, introduces the at least one beverage preparation into the potable base liquid;selecting at least one of the at least one beverage preparation from the at least one sealed chamber;applying pressure to at least one pressure point to activate the dispenser means;perforating the at least one thin membrane;releasing the at least one beverage preparation from the at least one sealed chamber into the potable base liquid; andmixing the at least one beverage preparation with the potable base liquid.

The method for preparing a portable beverage drink further comprises heating the base liquid; and flushing the at least one additive ingredient from the at least one sealed chamber into the base liquid by one of pressure action and sprinkler means.

A further method for producing a brewed beverage drink comprises: a) providing a brewing element including a beverage preparation therein; b) continuously heating quantities of approximately 15 milliliters (ml) of liquid to at least boiling; c) pressurizing the heated liquid to force it into and out of the brewing element; and repeating steps (b) and (c).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1is a partial cut-away, isometric view of a portable beverage preparation device, comprising a cup and a bonded cover, in a preferred embodiment of the invention.

A container, such as drinking cup32, and a tightly fitting cover34is sealed with a bond36to form a closed portable beverage preparation device. Bond36may be a heat seal or a mechanical bond as is known to those skilled in the art.

Cover34is provided with at least one sealed chamber38A/B including a dispersion means (not shown), such as small, sharp punching ribs. At least one additive ingredient40is provided in a measured quantity within at least one sealed chamber38A/B. Ingredients to use are selected by the user, such as, by way of example, any of the ingredients from the groups of edible materials: coffee, tea, cocoa; powders, grounds, and flakes; dried fruits, dried vegetables; fruit juice, vegetable juice; milk and milk-substitute powders; syrups, sweeteners, flavorings; emulsions, solutions, extracts; dried herbs, medicines; liquid concentrates, liquid condensates, and any combination from these groups. Unless otherwise noted, in the various examples of the portable beverage preparation device and system described herein, hot drinks preferably utilize typical coffee or expresso drink ingredients.

The sealed chambers may be of any shape or size which can be accommodated in the available space on the surface of cover34, but in the preferred embodiment of the invention shown, sealed chambers38A are accordion-like protuberances. Alternatively, by way of example, sealed chamber38B is shown as a bubble-like structure. The interior42of cup32is prefilled with a measured volume of liquid, such as water or milk (not shown). A convenient mouth-piece44is provided for drinking the mixed beverage, or a user may insert a straw (not shown) through the opening of mouth-piece44and imbibe the beverage in a more informal manner. A handle46is an optional feature of cup32.

Each of the sealed chambers38A/B is provided with a dispersion means, such as ribs (seeFIG. 3), which punch or perforate a thin membrane48disposed between each sealed chamber38A/B and the interior42of cup32. The thin membrane48is fabricated of plastic or metallic foil in a preferred embodiment of the invention.

When finger pressure is applied to the top edge of at least one, user-selected, sealed chambers38a/b, the beverage preparation within the selected chamber is forced out through the holes perforated in the thin membrane48by the dispenser means (see rib points72inFIG. 3) and fall into the liquid within cup32. Before drinking the beverage, the user need only shake the portable container to mix the contents more thoroughly. There is no messy waste to clean up from open, spilled cups as in the prior art, since the residue remains sealed inside cup30.

FIG. 2is a partial cut-away, isometric view of another embodiment of a portable beverage preparation device constructed in accordance with the principles of the invention.

A container, such as drinking cup32, and a cover50, which is bonded with a sealing bond36, form a sealed portable beverage preparation device. Bond36may be a heat seal or a mechanical bond as is known to those skilled in the art.

Cover50is provided with one or more, under-the-cover, suspended sealed chambers52. In the example shown inFIG. 2, sealed chambers52are divided into three segments, each storing a measured quantity of different beverage preparation for preparing a beverage drink, for example, chocolate powder, milk powder and sugar. Two of the beverage preparation as arbitrarily represented by numbers40,41are visible in the partial cut-away. Not shown are the dispersion means (seeFIG. 3), such as small, sharp, punching ribs which are enveloped and surrounded by the beverage preparation. These sealed chambers52may be of any shape or size accommodatable in the space available on the undersurface of cover50, but in the preferred embodiment of the invention shown, sealed chambers52are wedge-shaped segments. The interior42of cup32is prefilled with a predetermined volume of liquid, such as water (not shown). A convenient lip-like mouthpiece44is provided for drinking.

Simply shaking the closed cup32a few times mixes the beverage, and then it is ready to drink. A small removable cover is provided for reclosing the drinking opening.

It should be noted that the same cup32is adaptable for use with a heater/cooler device by inserting a heating/cooling element132(as inFIG. 8), or a simple heater element (not shown) with an adaptor for portable power, into the openings66(FIG. 3).

FIG. 3is yet another embodiment of the invention, illustrating a closed cup with both the sealed chambers for beverage preparation and a pump-type dispenser means disposed within the potable base liquid.

A container, such as cup58is provided with press-points60,61on opposing sides of cup58for operation of an internal, centrally disposed, pump-type dispersion means62. Several types of beverage preparation40,41are sealed in between thin, metallic foil membranes48which protect them from contact with the base liquid (not shown) provided within cup58. A cover64is sealed by a bond36to cup58. Cover64is provided with a mouthpiece lip-type opening44for drinking the mixed beverage, and an outer opening66for venting. Openings66and44can also be used for connecting to an inlet and outlet of a heating device or cooler as perFIGS. 8,9, and10.

Internal, centrally disposed, piston-type dispersion means62is operated by a user by applying finger pressure on press points60,61simultaneously. In one embodiment of the invention, pressure point61is shown as an accordion-type protrusion on one side of the cup58which collapses with gripping pressure on both pressure points60,61. Alternatively, cup flexibility might be sufficient to operate the dispersion means62given proper design considerations as is known to those skilled in the art. A fixed bar68acts as a break to the inward pressure on flexible bar70connected to piston35, which brings perforating ribs72into contact with the thin membranes48. A first pump on the pressure points60,61acts on the piston35and perforates both the inlet and outlet aluminum foils comprising the thin membranes48in a preferred embodiment of the invention. The next few pumping actions cause the base liquid to flow as indicated by the arrows, flushing the powder of the beverage preparation40,41to mix and complete the preparation of the beverage drink.

FIG. 4is a partial cut-away, isometric view of a cup similar to that ofFIG. 2, but shown with a core dispersion means with multiple beverage preparation in several vertical sealed containers extending into the cup.

The central cylinder74is divided into core segments for storing multiple beverage preparation39,40,41—all of which are provided in measured quantity with cup32. The dispersion means (not shown) can be designed to extend downward perforating the lower metallic foil membrane (not shown) when pressed, allowing the beverage preparation to disperse, as shown by the lower arrows, into the potable base liquid, preferably water.

Alternatively, hot or cold water is added from an external source through the opening in central core54(as shown by vertical arrows) after removing a protective cover (not shown) covering the beverage preparation39,40,41. This allows the cup32to be reused when supplied with refill units of beverage preparation selected in accordance with the taste and preference of a user and which is prepackaged in cylindrical form suitable for insertion into the central core54.

Cover50is provided with a mouthpiece lip-type opening44which serves as an outlet for drinking the prepared beverage (curved arrow up). One or more small venting slots, not shown in this example, are generally disposed on the cover50on the side opposite mouthpiece lip-type opening44.

FIGS.5A/B/C/D illustrate alternate embodiments and dispositions of the dispenser means of the invention for preparing a beverage drink in a baby bottle.

Referring now toFIG. 5A, a container, comprising a baby bottle80with a sealed, nipple cover82and a dispenser means84having both an upper punch86and a lower punch88for perforating both upper and lower thin membranes48. Enclosed between thin membranes48in the neck90of baby bottle80is a beverage preparation40. Although any beverage preparation suitable for use with infants may be used, in a preferred embodiment of the invention, beverage preparation40is powdered milk or milk substitute. The baby bottle80is prefilled with potable liquid, preferably treated water92. The nipple cover82is commonly a soft rubber or plastic and compressible. Finger action against the dispersal means84causes the lower punch88and upper punch86to perforate the thin membranes48and infuse their contents into the base liquid92, such as water. The drink is ready to give to an infant after shaking the container78by hand.

FIG. 5Billustrates an alternate embodiment of the invention for preparing a beverage drink for infants.

The beverage preparation40in the embodiment of the invention shown inFIG. 5Bare stored in a sealed chamber96comprising a hollow handle element of baby bottle94. The contents of sealed chamber96are dispensed into the potable base liquid, such as treated water92, through a thin membrane48which is a common surface between the bottle94and the beverage preparation chamber96which is formed as a handle on the side of bottle94. The other elements of the embodiment of the invention are as described in relation toFIG. 5A.

FIG. 5Cillustrates yet another embodiment of the invention for preparing a beverage drink for infants.

Baby bottle94in this embodiment of the invention is provided with a side-disposed dome-like, sealed chamber98storing measure amounts of an additive ingredient40for mixture with the treated water92. Finger pressure on the sealed chamber98activates a dispenser means (see above) perforating the thin membrane48. In a preferred embodiment of the invention, thin membrane48comprises aluminum foil although other metallic foils are also usable. Shaking the bottle94is sufficient to prepare the beverage for drinking.

FIG. 5Dillustrates a further embodiment of the invention for preparing a beverage drink for infants.

Baby bottle100is provided with a sealed chamber102which accommodates at least one pocket of beverage preparation40for mixing with the potable base liquid92supplied with the bottle100. The sealed chamber102is disposed in a recess formed in the bottom portion of the bottle by the extension of sides104. Other features and elements are as described heretofore for similar embodiments of the invention.

FIG. 6is an isometric, cutaway view of a cup container provided with a sealed chamber containing a beverage preparation disposed on the underside.

By way of example,FIG. 6shows a container, such as a cup106, similar to that shown inFIGS. 1-4, but with a sealed chamber102containing beverage preparation40disposed on an underside of the container, similar to the example for a baby bottle shown inFIG. 5D. Because the dry ingredients in the sealed chamber102are disposed on the underside of the container, problems may arise in preventing unwanted diffusion of the base liquid, such as water92(seeFIG. 5D), prior to the desired time for preparation of a beverage for drinking.

To overcome this problem or potential problem, the bottom portion of the container is constructed with an internal welding ring108and an external welding ring110for extra security in guarding against unwanted seepage. The two welding rings108,110improve the isolation between the base liquid, such as water92and the beverage preparation40, commonly powders or dried materials, by increasing the distance the water92must pass by diffusion through the plastic material, generally used in fabricating a drinking container.

FIG. 6Ais an enlarged, detail view6A of a portion of the construction of the container fromFIG. 6.

FIG. 6Ashows close details of the two bonding rings108,110of joining. The aluminum foil thin membrane48in the upper part of the sealed compartment, in a preferred embodiment of the invention, is sized to overlap part of the inside base of the container, in this case cup106. Using a heat bonding or welding technique known to those skilled in the art, the beverage preparation powder is well isolated from the liquid in the container. Such a method applied to a drinking cup is obviously applicable to any container made of similar material and with like disposition of a dry ingredient in close proximity to a liquid.

FIG. 7is an isometric, cross-section view of an embodiment of the invention for a beverage preparation system for medicinal potions.

A container, such as medicine bottle112is provided with a cover114comprising an elastic (rubber-like) dome116under which an additive ingredient40, such as medicinal powder, is stored. The underside of the sealed chamber is defined by a thin membrane48, such as aluminum foil, which is perforated by a dispersion means (such as described heretofore in relation to dome-like chamber38inFIG. 1) to mix the medicinal powder40with a base liquid92, as required to prepare a therapeutic potion. The elastic dome116is secured to the top of the medicine bottle112by a metallic sealing ring118. An injection piercing point120is conveniently provided at the apex of the elastic dome116for sterile injection of material into the sealed bottle112. The cover114is not removable as a metallic sealing ring118locks the bottle and prevents unsanitary reuse.

To allow passage of the medicinal powder40into the base liquid92in medicine bottle112, the thin membrane48is perforated either by pressing the elastic dome116against the powder additive ingredient40activating a dispersion means as heretofore described. The dispenser means breaks the thin membrane48along the welding line at its built-in break points. Alternatively, an additional ring (not shown) provided with sharp ribs may be disposed between the rubber-like elastic dome116and thin membrane48and operated by depressing elastic dome116.

FIG. 8is a cross-section view of an embodiment of the system of the invention for preparing a hot or cold beverage drink in a cup container utilizing a removable, portable, heating/cooling unit.

A heating/cooling unit122is provided, comprising a pump124connected to and driving a pump impeller126for drawing up the water92from a cup128. A controller device130for interfacing with a power means (not shown) is attached to a heating/cooling element132, such as a Peltier or equivalent heating/cooling element. Alternatively, only a heating element is used. The controller device130is also connected by a cable134to a standard automobile cigarette lighter jack136to connect with a power means, such as a car battery. The controller device130is also adaptable for conventional electrical usage if the portable beverage preparation system is operated at home or in the office.

The pump impeller126draws water92(indicated by upward curved arrows) into a water inlet138. The water92from cup128is made to flow over the surface of heating/cooling element132disposed in a small heating chamber154and is then recycled back into the cup128through a water outlet140. The process continues until the water92has reached a desired temperature as controlled by controller device130and then shuts itself off. Alternatively, a user can manually stop the heating/cooling cycle at any point in time. The heating/cooling unit122is then removed from the openings66in cover142and the beverage drink is ready to imbibe.

FIGS.9A/B/C are cross-section views of the steps in another beverage preparation system in accordance with the principles of the present invention.

As shown inFIG. 9A, a container, such as cup144, containing a sealed chamber56of a measured amount of beverage preparation40, is connected physically to a heating unit148by inserting protruding ports138and140into matching openings in the cover142of cup144. The heating unit148comprises a controller130in communication with a power source (not shown), utilizing a connector, such as an automobile cigarette lighter plug136. A heater element132is disposed in a heating chamber146separated from the power controller130and related elements in heating unit148.

InFIG. 9B, the entire cup144and heating unit148are turned upside down so that the water in cup144will move to the heating chamber and will be heated.

InFIG. 9C, the final stage of beverage preparation, the entire cup unit144and heating unit148are turned back with the cup unit144, right side up under the heating unit148. A one-way valve150prevents the water92from returning to the cup144except at the pump152outlet140. The high-pressure pump152is activated to open, by the force of water pressure, the thin membranes48enclosing beverage preparation40. In a preferred embodiment of the invention, thin membrane48is made of aluminum foil. The heated water flows through the beverage preparation40held inside cup144and fills cup144with the drink mixture. Alternatively, depending on the disposition of the sealed chamber56and the orientation of the thin membranes48sealing-in the beverage preparation40, a dispenser means as hereinbefore described is utilized to mix the now heated water92with the beverage preparation40. The heating unit148is then removed from the cup144and the prepared heated beverage, is ready to drink.

FIGS.10A/B are cross-section views of another embodiment of the system of the invention.

Referring now toFIG. 10A, a container, such as cup128is connected to a heating unit158with a snap-type connection so that a port156in heating unit158fits snugly into a matching opening in the cover142sealed onto cup128. The cup128is then inverted so that water92within the cup128is forced by gravity into a heating compartment146where it is heated by a heater element132as described heretofore in respect of the system ofFIG. 9. When the water has been heated, the cup128is returned to an upright position and the user removes the heating unit158.

Illustrated inFIG. 10is an accordion-like protuberance embodiment of the sealed chamber160containing the beverage preparation40. The beverage preparation is deployed by a dispenser means (not shown) embedded in the beverage preparation40as hereinbefore described. The user closes the openings in the sealed cover142with small covers provided, and shakes the cup128by hand a few times to mix the beverage thoroughly before drinking.

FIG. 11is an isometric cross-section view of a portable beverage preparation device constructed in accordance with another embodiment of the invention.

The portable beverage preparation system of the invention in the embodiment of the invention ofFIGS. 11-12,14-16includes a container, such as cup unit176and a heating unit162utilized when making a brewed beverage.

Referring toFIG. 11, the heating unit162includes a power interface unit164connected to a power cord134in communication with a power plug, for example, an automobile cigarette lighter plug136. The power interface unit164is connected to controller130which operates a switch168to turn the heating unit162on or off. The power source may be, for example, a conventional (domestic, commercial, industrial) electrical outlet, a battery source or an automobile cigarette lighter. Heating unit162also includes a heating element184containing a heater rod166which is connected to the switch168through a waterseal opening170. The heater rod166is controlled from a controller unit130which can detect changes in temperature vs. time and shut down the heating element if there is no more water to heat, if the water has reached a desired temperature, or if a used cup is accidentally connected to the system which might be out of fresh beverage preparation powder.

The heating unit162is provided with legs174for allowing the heating unit162to stand in a self-supporting manner (and for example, supporting a cup176when the heating unit162is in operation with the cup176). The heating unit162is provided with lip segments178, which are preferably discontinuous and rounded, and dimensioned to form a bayonet type connection with the corresponding lip segments180of the outer cup182. The outer cup182is provided with convenient ribs131for grasping the cup unit176when it is filled with a hot prepared beverage drink.

Turning toFIG. 11A, the cup unit176includes an outer cup182and inner cup78with a space between them, defining an outer chamber171. The inner cup78is typically adhered to the outer cup182, by ultrasonic welds, friction fits, adhesives or the like, and may be designed to be separable therefrom by small forces from a user. The inner78and outer182cups are typically coaxial (an also typically coaxial with the heating element184of the heating unit162).

This outer chamber171typically receives the brewed (steeped, etc.) beverage. Outer cup182may be provided with isolation ribs131for protecting the fingers of the user, and for providing gripping elements. The outer cup182terminates in lip segments180. These lip segments180are preferably discontinuous and rounded so as to form a bayonet type connection with correspondingly shaped portions178of the heating unit162.

The inner cup78includes a body79(seeFIG. 14) and a brewing element204, typically integral with the body79. The interior of the inner cup78serves as an inner chamber169(FIG. 14). The inner chamber169(represented by filler lines) is typically dimensioned so as to receive the heating element184and to hold water (not shown) or other similar liquid.

The brewing element204is, for example, a rim along the upper circumference of the inner cup78. It extends inward, to define a pocket173, typically ring shaped, between inner202and outer211walls (seeFIG. 11B), for holding (enclosing) beverage preparation40for beverage preparation (such as chopped, ground, powdered, edible materials, or materials consolidated in the form of rings, cubes, capsules, balls or the like). These preparations may be ground coffee, espresso, tea, hot chocolate, sugar, and the like. These preparations may either be inserted into the pocket173by the user or prepackaged by a manufacturer.

The inner wall202, typically defines a central opening218(see axial line inFIGS. 15 and 16), that is typically conical with a circular bore. This central opening218is for example, of dimensions suitable for receiving the heating element184of the heating unit162in a relatively snug and sealing manner, for support. To enhance this support, the inner wall202is for example, inwardly tapered (in the downward direction). Lateral bores51, extending longitudinally through the brewing element204, allow for venting (to the ambient environment) of the liquid in the inner chamber177.

The inner202and outer211walls include openings209,210, respectively. These openings209,210typically serve as fluid inlets and outlets, for the hot liquid, for example water, as it passes from the inner cup78through the heating element184to the outer chamber171of outer cup182, contacting the beverage preparation40of the beverage preparation in the pocket173during this passage.

The brewing element204typically includes a cover56. This cover56, in order to enable development of pressures necessary for hot liquid to flow through the beverage preparation40in the beverage preparation (for example, ground coffee or espresso) in the pocket173, typically encloses the pocket173and is typically sealed to the brewing element204, by reliable methods such as ultrasonic welding. The cover56is dimensioned so as to frictionally engage the remainder of the brewing element204prior to sealing.

FIG. 12is a cross-sectional view of the power and heating units shown independently of the cup container fromFIG. 11. Similar elements and features are indicated by like designations of numerals.

FIG. 12Ashows a detailed, enlarged, cross-sectional view of a heating element184fromFIGS. 11 and 12which includes an interior boiling chamber172. A heater rod166extends from a switch168(FIG. 12) into chamber172for heating the liquid that is admitted into chamber172. Liquid typically enters chamber172through openings190, typically at the lower end of the heating element184. The chamber172also includes openings188at the upper end of the heater rod166, which serve as vent openings (typically during the liquid filling stage in chamber172).

A valve, for example, formed from a temperature sensitive bimetal strip186, with ends186aof areas larger than the respective openings188,190are attached by a snap in action to the heating element184, for example, by being fitted into slots (not shown) inside heating element184. Once heated by the hot liquid, the bimetal strips186respond to the increased temperature as the ends186amove outward, with mounds186bon the ends186afitting into the openings188,190, so as to seal them. This sealing prevents liquid from flowing out from chamber172, and seals the chamber172allowing for the requisite brewing pressures to develop. These bimetal strips186forming the valves are typically such that both ends186a, and the mounds186bopen and close simultaneously, in response to temperature changes in the chamber172.

The controller130controls the heater rod166. The controller130, coupled with a heater coil167in the heater rod166, functions (among its other functions) as a primary, or main sensor for the heating unit162. The controller130includes circuitry for measuring conductivity of the heater coil167in the heater rod166.

Temperature sensing is performed to detect changes of heater resistance versus temperature (seeFIG. 13). Once a predetermined level has been reached for this value or alternately, a slope, defined by a predetermined temperature rise over a predetermined time, in accordance with the graph shown inFIG. 13, detailed below, has been attained, the controller130causes a shut-off of the switch168and therefore, the heater coil167of the heater rod166in the heating element184.

A sensor194is located inside the heater rod166. This sensor194is an auxiliary sensor with respect to the controller130(detailed above), as it operates independently of and in parallel with the heater coil167/controller130(detailed above). It will remain in operation should the heater coil167become damaged. This sensor194is a secondary sensor, placed into the heater rod166for safety, to override the primary sensor mechanism, if it becomes become damaged. This sensor signals the switch168to shut off the heater rod166when predetermined temperatures are reached in the chamber172.

A tube196extends from the lower end within heating element184, where it has an inlet190to the upper end of chamber172. The upper end196bof this tube196terminates in an opening198, that opens into a collar section200of the heating element184. These openings198are positioned proximate the inner wall202(seeFIG. 11B) of the brewing element204, such that fluid can flow through the pocket206of brewing element204, as described herein in reference toFIG. 14.

The collar section200shown inFIG. 12Aincludes a belt208, typically of an elastomeric material that is flexible, and typically functions as a pressure valve (to prevent fluid backflow into the chamber172), as its flexibility is such that the belt208can be moved outward in response to fluid pressure through the openings, allowing the fluid (for example, hot liquid and steam) to enter the brewing element204(seeFIG. 14), through openings210in the inner wall202(seeFIG. 15). When the fluid pressure is released, the belt208(seeFIG. 11B) flexes back to its original position.

Alternately, other pressure valves could be placed at the openings198.

The belt208is supported in its position by inner ribs212. Outer ribs214, are spaced apart from the inner ribs212. The inner212and outer214ribs run circumferentially around the outer surface of the heating element184, typically continuously, and support O-rings216between them. These O-rings216are typically of an elastomeric material and assist in the sealing between the heating element184and the brewing element204, when the heating element184is placed through the central opening218, for operation of the system of the portable beverage preparation device as shown inFIG. 11.

An exemplary operation of the portable beverage preparation system, detailed inFIGS. 11 and 12will now be described. Here, water is provided to the inner cup78of the cup unit176—in the precise amount so that additional water need not be added, for example, approximately 75 milliliters for preparing an espresso beverage), either by the user, or the user peels off the cover of the alternate cup, detailed hereinbefore. The heating element184is inserted in the inner chamber169(seeFIG. 14), and with the bimetal valve186simultaneously open, a small volume of water (for example, 15 ml or ⅕ of the amount of liquid in the inner cup78, should an espresso be desired) enters the confined space of the chamber172through the opening190. As the heater rod166begins to heat the liquid (e.g., water), the bimetal valve186close the openings188,190, allowing the pressure within the chamber172to rise as a result of the steam produced by the heated water.

The raised pressure in the chamber172forces liquid (i.e., water) through the tube196, thereby opening the valve (loosening the belt)208allowing a small quantity of pressurized water to exit the chamber172through the tube196into the brewing element204(through openings210in the inner wall202) and through the beverage preparation therein (in accordance with the arrows ofFIG. 11B). The now treated fluid leaves the brewing element204through openings209in the outer wall211, where it flows downward, into the chamber171between the outer182and inner78cups.

The chamber172is now left empty of water and, therefore, the temperature in the chamber172rises rapidly. The controller130senses the rapid heat rise and turns off the switch168for a short period of time. This allows the chamber172to cool and therefore allow the bimetal valves186to move inward opening the openings188,190, thereby allowing the chamber172to refill and the process (cycle) to be repeated.

This process (cycle) is repeated for as long as desired. For example, there are about five cycles of approximately 15 ml each for the predefined volume of approximately 75 ml in the inner chamber169. The process typically continues until the inner chamber169of the cup78is empty.

Should the process be complete, the user can manually turn off the heating unit162, typically by a manual switch or the like, coupled to the aforementioned electronics of the heating unit162(or can remove the plug136from the outlet). Should the heating unit162remain on (not shut off manually), it will shut off by itself, as detailed above.

The user turns the cup unit176, so that its lip segments180are out of contact with the corresponding lip segments178of the heating unit162. The cup unit176can now be removed and separated from the heating unit162, and the hot drink is ready for the user. Otherwise, once the cup unit176has been removed and separated from the heating unit162, the user may place the cover56onto the cup unit176, such that it holds by a snap-fit, to keep the beverage hot until drinking is desired (as shown inFIG. 16).

FIG. 13is a graph comparing temperature variations over time for water heated by the heater element ofFIG. 12Aunder different water conditions.

FIG. 13details temperature curves for normal operation of the portable beverage preparation device in accordance with the principles of the invention. These temperature curves correspond to input parameters for the controller130of the power unit164, through a series of heating slopes. These slopes are representative of behavior that will cause the controller130to shut off power to the switch168, or begin a new cycle, when certain heating slopes occur. The changes in temperature are detected by the heater rod166, based on resistance or conductivity changes, performed by the controller130.

Line122labeled R is indicative of conditions in the chamber172, when empty of liquid and the heater rod166in heater element184remains on. R indicates the detected linear rise in temperature, at a steep slope, that if this or a similar steep slope is attained at the start of a heating cycle, indicates that liquid is not in the cup unit176, and the heating unit162will shut off. This occurs as the controller130shuts off power to the switch168and accordingly, the heater rod166. Here, the process stops until the user replaces the empty cup unit176with a new one.

In line S by comparison, the inner segment131is at a gradual slope, indicating heating of liquid, typically water, to boiling temperatures, for example, approximately 105 degrees Celsius. Prior to boiling under pressure, latent heat that has accumulated, defines the outer segment132, that is flat and/or of a very low slope at the end of the line132. Here, all of the liquid has been passed out of the chamber172through the tube196and the temperature jumps dramatically as all the water is dissipated outward represented by segment133of line S. Note the steep rise of the slope similar to that for line R. This behavior results in the heating process being shut off and the beginning of a new cycle.

In the case of a heating process lasting too long in accordance with segment132(the temperature and pressure will rise greater than desired), this is indicative of a blocked valve, blocked tube or other outlet being blocked. The system will shut down indicating the need for repair. The controller130detects a change in conductivity/resistance, and shuts off power to the switch168. The controller130has circuitry, typically configured to lock the electronics of the heating unit162for safety reasons, should shut off under these conditions occur. Also, the additional sensor194has circuitry that if activated will also signal the controller130to lock the system, if the aforementioned shut-off conditions occur.

The portable beverage preparation system of the invention, in alternative embodiments thereof, can also include sensors to indicate the presence or absence of a cup unit176. There may also be sensors to indicate the presence of a new cup, in which case, the system will operate; or a used cup, an improper or a defective cup; in which case the system will not operate. These cup type sensors are typically optical sensors that detect color or equivalents as is known to those skilled in the art. The aforementioned sensors can be connected to the controller130that would either allow system operation or lock it, based on the detected condition.

Additionally, the system may include a locking plunger (not shown), that holds the cup unit176firmly in place on the heating unit162during operation and in particular during heating of the liquid.

FIG. 14is a cross-sectional view of the cup unit fromFIG. 11, including a brewing element. Similar elements and features are indicated by like designations of numerals.

FIG. 15is an isometric, exploded, cross-sectional view of the cup unit ofFIG. 14, but with a removable brewing element;

FIG. 15details an alternate embodiment of the beverage preparation device with a cup unit176, as detailed above, except that the brewing element203is separable from the cup body205. This brewing element203includes a cuff220of a diameter just slightly greater than the diameter of the inner wall222of the upper, wider portion of the cup body205, to provide a frictional engagement when the cuff220is placed into the inner cup78. This brewing element203may be filled with a prepackaged consolidated beverage base, ground or powdered substance.

FIG. 16is an isometric, cross-sectional view of a cover mounted on the cup unit ofFIG. 14after heating of a brew.

Referring now toFIG. 16, there is shown a cover56, configured to fit the cup unit176, to seal both the liquid and the powder isolated from each other and the ambient environment (typically to avoid contamination and moisture from the ambient environment after use). The cup unit176is normally supplied as a fully-equipped closed unit that contains treated (pretreated) water, powders or liquids.

The cover56includes lip segments181that connect with correspondingly configured lip segments180on the outer cup182in a snap-type connection. The cover56can be provided with protrusions224positioned and configured for fitting into the bores51of the brewing element203. A central insert226covers the central opening218(indicated by central dashed line) to isolate liquids in the chamber169from the powders in the pocket173.

FIG. 17Ais an axial, cross-sectional view of a further embodiment of a brewing element of the invention.

FIG. 17Bis an isometric, cross-sectional view of the brewing element ofFIG. 17A.

FIGS. 17A and 17Billustrate another embodiment of a brewing element230configured with two concentric ring sections232,234for insertion of beverage preparation40,41, that is, different beverage preparations in each. These sections232,234are sealed from each other and are opened by either heat or pressure or combinations thereof. Upon opening, the sections232,234will form tunnels in a labyrinth configuration, allowing hot water to contact the beverage preparations in both sections232,234, prior to entering the outer cup182(FIG. 16). For example, combinations such as coffee and chocolate may be in each of the sections232,234, to provide a mocha beverage. Similarly, parallel radial chambers can be used for holding different beverage powders. The central core218is similar to that described heretofore for insertion of a portable heating unit162.

FIG. 18is a top, cross-sectional view of yet another embodiment of a brewing element of the invention.

InFIG. 18, there is shown a brewing element236provided with a spiral channel238with two areas240,242, typically arranged serially, for different beverage preparations. There are typically partition members244between the two areas240,242. For example, the inner area240may hold one beverage preparation additive ingredient40, such as coffee, and the outer area242may hold a different additive ingredient43, such as chocolate, sugar, powdered milk, and the like.

In operation, hot water runs the course of the spiral channel246, contacting both preparations, with sufficient pressure because of the narrowness of the channel246, prior to entering the outer cup78(FIG. 16) as a mocha beverage. Arrows indicate the inlet and outlet for the water flow.

Alternatively, partition members244may be omitted and just a single additive ingredient, for example, soup powder, provided for mixing with the liquid in a cup unit176, as hereinbefore described.

FIG. 19is a cross-sectional view of another embodiment of the cup unit ofFIG. 14.

In this alternate embodiment of the invention, the cup unit250is designed to accept a user-selected brewing element to be inserted into cup250(seeFIG. 15) and heated by a heating unit. (such as162inFIG. 11). In this case, the inner cup78which contains treated water or other treated liquid92is sealed, typically with a peel-off lid248or the like, across the top of the inner cup78, and also typically the outer cup182. This peel-off lid248is easily opened by the user when a user desires to insert a brewing element, and is fabricated of materials to preserve the freshness of the liquid in the inner cup78. The peel-off lid248can be such that it is a single lid, covering the entire cup unit250or multiple lids, covering various portions of the cup unit250. Other features and elements of cup unit250are substantially as described hereinbefore.

While preferred embodiments of the present invention have been described, so as to enable one of skill in the art to practice the present invention, the preceding description is intended to be exemplary only, including the structural elements, combinations thereof, methods and processes, and portions thereof, disclosed herein. These descriptions should not be used to limit the scope of the invention. The scope of the invention should be determined by reference to the following claims.