US20020113101A1 - Hydration pouch with integral thermal medium - Google Patents
Hydration pouch with integral thermal medium Download PDFInfo
- Publication number
- US20020113101A1 US20020113101A1 US10/043,657 US4365702A US2002113101A1 US 20020113101 A1 US20020113101 A1 US 20020113101A1 US 4365702 A US4365702 A US 4365702A US 2002113101 A1 US2002113101 A1 US 2002113101A1
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- United States
- Prior art keywords
- pouch
- medium
- hydration
- fluid
- conduit
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
- A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
- A45F3/16—Water-bottles; Mess-tins; Cups
- A45F3/20—Water-bottles; Mess-tins; Cups of flexible material; Collapsible or stackable cups
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
- A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
- A45F3/04—Sacks or packs carried on the body by means of two straps passing over the two shoulders
- A45F2003/045—Sacks or packs carried on the body by means of two straps passing over the two shoulders and one additional strap around the waist
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J41/00—Thermally-insulated vessels, e.g. flasks, jugs, jars
- A47J41/0038—Thermally-insulated vessels, e.g. flasks, jugs, jars comprising additional heating or cooling means, i.e. use of thermal energy in addition to stored material
- A47J41/0044—Thermally-insulated vessels, e.g. flasks, jugs, jars comprising additional heating or cooling means, i.e. use of thermal energy in addition to stored material comprising heat or cold storing elements or material, i.e. energy transfer within the vessel
Definitions
- This relates to cooled and/or heated hydration systems, particularly those configured for portable use.
- a system that has become widely used includes a backpack-like structure, which contains a flexible pouch or bladder coupled to a conduit to remotely deliver fluids to a user.
- This type of system offers many advantages.
- the flexible nature of the pouch allows it to expand in order to hold a significant volume of liquid while conforming to the body of a rider. Upon drainage, the volume the pouch decreases making storage and handling easy.
- the backpack fits conveniently out of the way so it does not interfere with body movement. Yet, by positioning the outlet of the conduit near or at the mouth of a user refreshment is immediately available.
- An area in which there has been little innovation is that of maintaining the fluid within the bladder or pouch at a cool temperature, i.e., at a temperature below ambient temperature, or an elevated temperature, i.e. , at a temperature above ambient temperature.
- Backpacks housing hydration bladders have been designed to include insulating material.
- packs sized to receive both a container for liquid and be fillable with ice such as shown in U.S. Patent No. 4,196,817 to Moser have been designed.
- few modifications have been made to the structural nature of flexible pouch hydration systems in effort to provide for cool liquid within the same.
- the present invention is a hydration system with integral thermal medium. It includes a sac or pouch with a sealable inner compartment for drinking fluid and at least one outer compartment filled with cooling and/or heating medium or a medium suitable for either application. Any such medium may be referred to as a thermal capacitance medium.
- the pouch may be provided by a first bag located within a second bag with the cooling and/or heating medium provided there between. Alternately, it may be provided by a first sleeve, within a second sleeve with cooling and/or heating medium between each. Still further, the pouch may be such that its sides include pockets or panels filled with medium. Other configurations in accordance with the present invention are possible as well.
- the thermal capacitance medium may be water, a gel or another material, which can be repeatedly chilled and/or heated. Once its temperature is altered, the medium effectively maintains fluid within the pouch at depressed or elevated temperature for some time.
- the hydration system may include a conduit for providing fluid stored withinthe pouch to a user. This may be capped by a valve to be articulated by a user to dispense fluid.
- the system may also include a wearable housing or harness to receive the pouch.
- the housing includes thermal insulation.
- Figure 1 shows an overview of the present system
- Figures 2A, 2B and 2C show integrally cooled hydration pouches in partial cut away
- Figures 3A and 3B show optional wall configurations for the integrally cooled hydration pouches
- Figures 4A and 4B show cross-sectional configurations useable for the integrally cooled hydration pouches.
- the integrally-cooled pouch described herein is advantageously incorporated in a "camel back" type hydration system or arrangement like that described in U.S. Patent No. 5,060,833 to Edison noted above and/or includes such features as described in U.S. Patent Nos. 4,420,097 to Motsenbocker; 4,948,023 to Tripp; 5,085,349 to Fawcett; 5,282,557 to McCook; 5,427,290 to Thatcher; 5,722,573 to Camel; 5,727,714 to Fawcett; 5,806,726 to Ho; 5,864,880 to Adam; 5,911,406 to Winefordener et al.
- the inventive system may include a pack 2 adapted to house a hydration pouch 4 .
- packs suitable for such use. Exemplary packs include those sold by K2 Bike (Vashon WA), CamelBak (Weatherford TX), Blackburn Designs (San Jose CA), and Performance Bicycle Inc. (Chapil Hill NC).
- the pack 2 includes a housing portion 6 with an access zipper 8 and straps 10 .
- Hydration pouch 4 is shown within the pack 2 .
- the pouch 4 shown is fluidly connected to a conduit 12 including a valve 14 to prevent inadvertent draining of the pouch 4 .
- the valve 14 is preferably a bite-valve articulable by the jaws of a user.
- the conduit 12 may be connected to the pouch 4 via a fitting 16 .
- the pouch includes a sealable opening 18 through which it may be filled. It may include a hanger section 20 .
- the opening to the pouch 4 may be designed to accept an end of the conduit as depicted in U.S. Patent No. 5,722,573 to Camel.
- the inlet of the conduit 22 is preferably attached at a lower portion of the pouch 4 when it is to be utilized in conjunction with a backpack as shown in order to facilitate full evacuation of liquid from the pouch 4 .
- An exemplary hydration pouch lacking the integral cooling structure of the present invention, but otherwise having components useable in the present inventions, is sold by K2 Bike.
- material forming portions of the pouch 4 intended to contact fluid for drinking preferably comprise such materials as commonly used in other flexible hydration bags, pouches, bladders or the like produced by companies such as Gregory Manufacturing Inc. (Holeyoke MA) and Dielectrics (Chicopee MA).
- Suitable materials include, but are not limited to polyethylene, urethane, polyurethane, polystyrene, and nylon.
- the inventive hydration pouch 4 described herein may be utilized as part of a larger hydration system including a backpack or harness 2 or be used independent of such structure.
- the pouch itself is distinguishable from known hydration pouches designed for similar use in that it integrally includes provision for cooling and/or heating or maintaining the temperature of fluid filling the same at an elevated or depressed temperature. Variations on how integration of the thermal capacitance medium 24 into the pouch may be achieved are described below. First, however, preparation of the pouch 4 for use is described since this is common to such variations.
- a pouch 4 As shown in the figures for use, it may be placed within a freezer when empty to cool the pouch well below the ambient temperature at which the pouch will be used to dispense fluid. Chilling the bag below 0°C is preferred. It is most preferred to chill the pouch 4 to as low a temperature as is conventionally possible by a typical freezer or out-of- doors. After chilling, the pouch 4 is filled with liquid. Such liquid may itself be chilled. It is also possible to fill the pouch with ice, though this may not be preferred for reasons as discussed above. Alternately, the pouch 4 may be heated, for instance, by placing it in a microwave. The duration and intensity of such heating is easily controlled by a user. Drinking fluid at ambient temperature may be poured into the pouch 4 prior to application of heating energy. Alternately, preheated liquid may be added to the pouch 4 prior to or after heating the pouch 4 .
- thermal medium 24 may be water, a gel or other material that may be effectively chilled and/or heated.
- the material or materials chosen should have a high specific heat or heat capacity in order to best cool and/or heat or maintain a low or a high temperature of fluid within the pouch 4 .
- a preferred medium 24 for cooling comprises a non-toxic refrigerant gel of conventional formulation.
- Compositions that may be suitable for medium 24 include water and propylene glycol or a cellulose ether, those described in U.S. Patent Nos. 6,044,201 to Van Turnhout and 5,035,122 to Oogjen (and references cited in each), those used/produced by Consolidated Products and Services, Inc. (Braintree, MA), or as used in commercially available gel packs for cooling and/or heating including NexpareTM (3M: St. Paul, MN), PolyBagTM(Super Ice Corporation: San Leandro, CA).
- medium 24 when placed in a typical freezer, it preferably sets-up at least partially. In some instances, it may become solid. In others, it will remain pliable. It is preferred that it remains somewhat pliable. Such a condition enables a user to inflate the pouch 4 with air, upon which the chilled cooling material 24 causes the pouch to remain substantially open thereby facilitate filling with liquid. This alleviates such fill problems as commonly experienced with typical hydration pouches as noted above.
- hydration pouch of the invention can be used in other settings or in conjunction hardware other than a backpack or harness 2 such as shown in Figure 1.
- the pouch may be used without a conduit designed to facilitate remote consumption of liquid from the pouch.
- a spicket or valve may be provided apart from the cap.
- the cap 18 may be the only opening (a friction fit or a screw fit may be used as seal) or it may include a valve itself.
- Figures 2A-2C provide various examples of forms that the integrally cooled hydration pouch 4 may take, particularly for use in a "camel back" arrangement.
- Figure 2A shows an advantageous configuration wherein the pouch 4 is made in layers formed by an inner bag 26 surrounded by an outer bag 28 .
- the bags 26 , 28 may be affixed to each other along end sections 38 as indicated by the darkened bar.
- the outer bag 28 may be attached to the inner bag 26 at a lower level. Attachment may be accomplished by heat sealing or welding the material together. Typical heated elements, ultrasonic or chemical welding may be employed for welding. Alternately, desired sealing may be accomplished using silicone gel, adhesives or otherwise. The same joining methods may be used in any variation of the pouch 4 .
- Each of the bags 26 , 28 may be formed from sheet material folded over and joined to form the desired shape or otherwise.
- the inside of the first bag 26 provides an interior compartment 30 in the pouch 4 for containing consumable fluid.
- the space 32 between the outside for the first bag 26 and inside of the second bag define layers 28 of the pouch 4 and is filled with cooling medium 24 .
- the thermal capacitance medium filling space within the pouch 4 is preferably uniformly distributed. Where a gel is used, an even amount about 3 mm to 10 mm on each side of the pouch 4 is preferred. Utilizing about 12-20 fluid oz., preferably 16 fluid oz., of medium 24 (such as a gel) for a hydration pouch having a capacity of about 70 fluid oz. insures adequate heat/cold capacity. Still, it is to be understood that other configurations and sizing of the pouch 4 are within the scope of the invention.
- Figure 2B shows a second variation of the inventive pouch 4 where an inner sleeve 34 is surrounded by an outer sleeve 36 to provide the inner and outer layers forming the desired drinking fluid compartment 30 and medium space 32 .
- the end sections 38 of the sleeves 34 , 36 are joined together.
- the outer sleeve 36 may be joined to the inner sleeve 34 at some distance from the end sections 38 .
- the sleeves used in this variation of the invention may be formed from sheets of material.
- the inventive pouch 4 may also be made from sheets or panels 40 of material without first forming such sheets into bags or sleeves.
- the compartment 30 between the inner layers and the spaces 32 between the inner and outer layers are formed between the sheets 40 welded or joined, around the periphery 42 of the pouch 4 .
- smaller panels 40 to form space for the cooling medium 24 may be joined to the inner layer or layers of the pouch inboard the edge 42 .
- more than one receptacle space 32 for cooling material 24 may be formed on a given side of the pouch 4 .
- the structure provided to receive medium 24 will be configured so that it substantially surrounds or covers the interior compartment 30 .
- Most preferably, all, or significantly all the surface of the drinking fluid compartment 30 is surrounded by or in contact with the thermal medium. Therefore, while only one side of each of the variations shown in Figures 2A-2C is shown, it is to be understood that both sides should include medium 24 .
- a friction-fit removable cap 18 is preferred for a Camelback®type arrangement. Alternately, a screw-type cap assembly may be preferred. Whatever the case, the cap or any fitting associated with the same should open only to the interior compartment 30 .
- Any outer bladder, receptacle or compartment 32 for receiving medium 24 is isolated from the opening of the pouch 4 by welding or another barrier such as a layer of silicone.
- a conduit 12 is provided to evacuate the pouch 4 , the opening to the conduit or any fitting associated with the same should open only to the interior 30 .
- the gel-filled sections 32 of the pouch 4 may be left inviolate or may be interrupted. Such sections may be interrupted by structures preferably provided by welding the inner and outer layers 44 of the pouch together. Such interruption assists in maintaining even distribution of cooling medium 24 , a matrix of circles or dots 46 as shown in Figure 3A may be most effective in this regard. Alternately, one or more striped sections 48 as shown in Figure 3B may be provided. Naturally, the orientation, width or other parameters of the striping may be varied.
- Figures 4A and 4B show cross-sectional configurations useable with any of the variations of the pouch 4 of the present invention.
- the pouch may have a simple two-sided bladder shape as shown in Figures 4A. Alternately, it may include one or more expansion sections or pleats 52 adjacent to the opposite sides of the pouch 4 as shown in Figure 4B. Each configuration is advantageous in that it will more easily collapse in a flattened manner upon draining than other shapes.
- Each cross section shows the drinking fluid compartment 30 and areas that may be filled with cooling medium 24 .
- inventive bladder 4 may have other cross-sectional shapes as deemed convenient for the setting in which it is to be employed. For example, it may be rounded (e.g., circular, elliptical, ovolaid or oblong) or rectilinear (e.g., square or rectangular). Also, the pouch 4 may have a differing plan view than those depicted in Figures 2A-2C.
- inventive pouch may be configured substantially in the form of a square, circle, another regular geometric shape or otherwise depending on its intended use.
- a sling, sidepack or type of bag other than that shown in Figure 1 may be preferred to house the pouch 4 .
- inventive pouch may be configured to integrally include carrying structure(s) such as strap(s), a belt, sling or harness.
- carrying structure(s) such as strap(s), a belt, sling or harness.
- Optional housings or carrying structures are illustrated in the references listed above.
Abstract
A hydration system with integral thermal medium is described. It includes a sealable sac or pouch closely associated with a cooling and/or heating medium. The pouch includes an interior portion with a sealable opening to receive liquid for consumption and at least one exterior portion containing the medium. The pouch may be fit into a backpack. It is preferred that any pack used includes insulation. A conduit, preferably capped by a valve, may be fluidly connected to the interior of the pouch to facilitate remote use of the same. In preparation for use, the pouch is preferably chilled, for example in a freezer, or heated, for example in a microwave and then filled with liquid to be consumed by a user to maintain hydration or for enjoyment.
Description
- This is a continuation of PCT application no. US01/27285 filed August 31, 2001, entitled Hydration Pouch With Integral Thermal Medium to Jeff S. Skillern which claims the benefit of of U.S. Patent Application S/N 09/653,816, filed September 1, 2000, entitled Integrally Cooled Hydration Pouch to the same inventor.
- This relates to cooled and/or heated hydration systems, particularly those configured for portable use.
- The importance of maintaining adequate hydration during physical activity is well known. Water, fruit juices and other specialized drinks may be ingested to serve this purpose. To be most effective in maintaining hydration levels, frequent or continual access to a supply of liquid is preferred. Furthermore, when the fluid ingested is cooled, additional health benefits arise. Heat prostration may be more easily avoided as a result of ingesting cool liquid. Athletic performance may also be assisted by helping absorb heat from the body that otherwise contributes to fatigue. For use in cold environments however, such as when skiing, boating, ice fishing, hunting or mountaineering, heated drinking fluid is often preferred.
- Numerous portable hydration systems have been developed which may be employed during physical activity. Especially for use in bicycling, a system that has become widely used includes a backpack-like structure, which contains a flexible pouch or bladder coupled to a conduit to remotely deliver fluids to a user. This type of system offers many advantages. The flexible nature of the pouch allows it to expand in order to hold a significant volume of liquid while conforming to the body of a rider. Upon drainage, the volume the pouch decreases making storage and handling easy. When worn, the backpack fits conveniently out of the way so it does not interfere with body movement. Yet, by positioning the outlet of the conduit near or at the mouth of a user refreshment is immediately available.
- Such advantages are not offered by typical beverage bottles for use in cycling. They are not capable of being worn on the body comfortably due to their non-compliant nature, which is required for handling. Further, use of a typical water bottle requires significant movement of the bottle to the mouth of a user.
- Wearable flexible hydration sacs like those described above have been the subject of considerable improvement in certain areas. Improvements made to such devices include more effective valves or dispensing means such as described in U.S. Patent Nos. 5,060,833 to Edisonet al.; 5,085,349 to Fawcett; 5,911,406 to Winefordener et al.; 6,032,831 to Gardener et al. and 6,039,305 to Hoskins et al. Also, U.S. Patent Nos. 5,727,714 to Fawcett and 5,806,726 to Ho describe improved interfaces between the hydration bladder and dispenser conduit.
- An area in which there has been little innovation is that of maintaining the fluid within the bladder or pouch at a cool temperature,i.e., at a temperature below ambient temperature, or an elevated temperature, i.e., at a temperature above ambient temperature. Backpacks housing hydration bladders have been designed to include insulating material. Also, packs sized to receive both a container for liquid and be fillable with ice such as shown in U.S. Patent No. 4,196,817 to Moser have been designed. However, few modifications have been made to the structural nature of flexible pouch hydration systems in effort to provide for cool liquid within the same.
- Those using standard hydration bladders sometimes fill them with ice in an effort to maintain cool temperatures for a significant amount of time. This may be accomplished as shown in U.S. Patent No. 5,806,726 to Ho by using standard ice cubes. Alternately, elongate bars of ice may be used to make filling a hydration pouch with ice marginally less burdensome. Either way, as the ice melts it dilutes any dissimilar liquid. This compromises the quality of any specialized drink used. It is a particular problem if carbonated drink is preferred. Furthermore, the production and handling of the ice is not ideal. Issues ranging from inconvenience to contamination arise. Also, use of ice within a bladder prevents the consumption of its full contents until all the ice melts, thus hindering hydration efficiency.
- Another problem with existing hydration pouches is the difficulty experiencedin filling the same. Adhesion between opposite sides of the bladder, and the lack of locations to effectively grip the same can make filling messy, troublesome and wasteful of drinking fluid spilled in the struggle.
- Therefore, need exists for a hydration system in which more effective cooling or heating or temperature maintenance of fluid within a flexible sac can be achieved. Further, need exists for a flexible hydration pouch which is more easily filled than those presently available. The present invention meets these needs and others not expressly mentioned, but which may be readily appreciated by those with skill in the art.
- The present invention is a hydration system with integral thermal medium. It includes a sac or pouch with a sealable inner compartment for drinking fluid and at least one outer compartment filled with cooling and/or heating medium or a medium suitable for either application. Any such medium may be referred to as a thermal capacitance medium. The pouch may be provided by a first bag located within a second bag with the cooling and/or heating medium provided there between. Alternately, it may be provided by a first sleeve, within a second sleeve with cooling and/or heating medium between each. Still further, the pouch may be such that its sides include pockets or panels filled with medium. Other configurations in accordance with the present invention are possible as well.
- The thermal capacitance medium may be water, a gel or another material, which can be repeatedly chilled and/or heated. Once its temperature is altered, the medium effectively maintains fluid within the pouch at depressed or elevated temperature for some time.
- The hydration system may include a conduit for providing fluid stored withinthe pouch to a user. This may be capped by a valve to be articulated by a user to dispense fluid. The system may also include a wearable housing or harness to receive the pouch. Preferably, the housing includes thermal insulation.
- The following figures diagrammatically illustrate exemplary aspects of the present invention with similar features in the various figures correspond to those enumerated in others: Figure 1 shows an overview of the present system; Figures 2A, 2B and 2C show integrally cooled hydration pouches in partial cut away; Figures 3A and 3B show optional wall configurations for the integrally cooled hydration pouches; Figures 4A and 4B show cross-sectional configurations useable for the integrally cooled hydration pouches.
- The integrally-cooled pouch described herein is advantageously incorporated in a "camel back" type hydration system or arrangement like that described in U.S. Patent No. 5,060,833 to Edison noted above and/or includes such features as described in U.S. Patent Nos. 4,420,097 to Motsenbocker; 4,948,023 to Tripp; 5,085,349 to Fawcett; 5,282,557 to McCook; 5,427,290 to Thatcher; 5,722,573 to Camel; 5,727,714 to Fawcett; 5,806,726 to Ho; 5,864,880 to Adam; 5,911,406 to Winefordeneret al.; 5,941,640 to Thatcher; 5,975,387 to Gleason et al.; 6,032,831 to Gardener et al.; and 6,039,305 to Hoskins et al.As shown in Figure 1, the inventive system may include a
pack 2 adapted to house ahydration pouch 4. Various manufacturers produce packs suitable for such use. Exemplary packs include those sold by K2 Bike (Vashon WA), CamelBak (Weatherford TX), Blackburn Designs (San Jose CA), and Performance Bicycle Inc. (Chapil Hill NC). - The
pack 2 includes ahousing portion 6 with anaccess zipper 8 andstraps 10.Hydration pouch 4 is shown within thepack 2. Thepouch 4 shown is fluidly connected to aconduit 12 including avalve 14 to prevent inadvertent draining of thepouch 4. Thevalve 14 is preferably a bite-valve articulable by the jaws of a user. Theconduit 12 may be connected to thepouch 4 via a fitting 16. The pouch includes asealable opening 18 through which it may be filled. It may include ahanger section 20. - Though not pictured in this manner, the opening to the
pouch 4 may be designed to accept an end of the conduit as depicted in U.S. Patent No. 5,722,573 to Camel. Whatever the case, the inlet of theconduit 22 is preferably attached at a lower portion of thepouch 4 when it is to be utilized in conjunction with a backpack as shown in order to facilitate full evacuation of liquid from thepouch 4. An exemplary hydration pouch lacking the integral cooling structure of the present invention, but otherwise having components useable in the present inventions, is sold by K2 Bike. - In the present invention, material forming portions of the
pouch 4 intended to contact fluid for drinking preferably comprise such materials as commonly used in other flexible hydration bags, pouches, bladders or the like produced by companies such as Gregory Manufacturing Inc. (Holeyoke MA) and Dielectrics (Chicopee MA). Suitable materials include, but are not limited to polyethylene, urethane, polyurethane, polystyrene, and nylon. - The
inventive hydration pouch 4 described herein may be utilized as part of a larger hydration system including a backpack orharness 2 or be used independent of such structure. The pouch itself is distinguishable from known hydration pouches designed for similar use in that it integrally includes provision for cooling and/or heating or maintaining the temperature of fluid filling the same at an elevated or depressed temperature. Variations on how integration of thethermal capacitance medium 24 into the pouch may be achieved are described below. First, however, preparation of thepouch 4 for use is described since this is common to such variations. - To prepare a
pouch 4 as shown in the figures for use, it may be placed within a freezer when empty to cool the pouch well below the ambient temperature at which the pouch will be used to dispense fluid. Chilling the bag below 0°C is preferred. It is most preferred to chill thepouch 4 to as low a temperature as is conventionally possible by a typical freezer or out-of- doors. After chilling, thepouch 4 is filled with liquid. Such liquid may itself be chilled. It is also possible to fill the pouch with ice, though this may not be preferred for reasons as discussed above. Alternately, thepouch 4 may be heated, for instance, by placing it in a microwave. The duration and intensity of such heating is easily controlled by a user. Drinking fluid at ambient temperature may be poured into thepouch 4 prior to application of heating energy. Alternately, preheated liquid may be added to thepouch 4 prior to or after heating thepouch 4. - In each variation of the present invention,
thermal medium 24 may be water, a gel or other material that may be effectively chilled and/or heated. The material or materials chosen should have a high specific heat or heat capacity in order to best cool and/or heat or maintain a low or a high temperature of fluid within thepouch 4. Apreferred medium 24 for cooling comprises a non-toxic refrigerant gel of conventional formulation. Compositions that may be suitable for medium 24 include water and propylene glycol or a cellulose ether, those described in U.S. Patent Nos. 6,044,201 to Van Turnhout and 5,035,122 to Oogjen (and references cited in each), those used/produced by Consolidated Products and Services, Inc. (Braintree, MA), or as used in commercially available gel packs for cooling and/or heating including Nexpare™ (3M: St. Paul, MN), PolyBag™(Super Ice Corporation: San Leandro, CA). - When medium 24 is a cooling medium, when placed in a typical freezer, it preferably sets-up at least partially. In some instances, it may become solid. In others, it will remain pliable. It is preferred that it remains somewhat pliable. Such a condition enables a user to inflate the
pouch 4 with air, upon which the chilledcooling material 24 causes the pouch to remain substantially open thereby facilitate filling with liquid. This alleviates such fill problems as commonly experienced with typical hydration pouches as noted above. - Various configurations are possible for use in providing a hydration bag according to the present invention. Furthermore, it is to be understood that the hydration pouch of the invention can be used in other settings or in conjunction hardware other than a backpack or
harness 2 such as shown in Figure 1. Furthermore, the pouch may be used without a conduit designed to facilitate remote consumption of liquid from the pouch. Alternately, a spicket or valve may be provided apart from the cap. Still further, thecap 18 may be the only opening (a friction fit or a screw fit may be used as seal) or it may include a valve itself. Nonetheless, Figures 2A-2C provide various examples of forms that the integrally cooledhydration pouch 4 may take, particularly for use in a "camel back" arrangement. - Figure 2A shows an advantageous configuration wherein the
pouch 4 is made in layers formed by aninner bag 26 surrounded by anouter bag 28. Preferably they will be made of similar material so welding may easily join them. Thebags end sections 38 as indicated by the darkened bar. Alternately, theouter bag 28 may be attached to theinner bag 26 at a lower level. Attachment may be accomplished by heat sealing or welding the material together. Typical heated elements, ultrasonic or chemical welding may be employed for welding. Alternately, desired sealing may be accomplished using silicone gel, adhesives or otherwise. The same joining methods may be used in any variation of thepouch 4. - Each of the
bags first bag 26 provides aninterior compartment 30 in thepouch 4 for containing consumable fluid. Thespace 32 between the outside for thefirst bag 26 and inside of the second bag definelayers 28 of thepouch 4 and is filled with coolingmedium 24. - Regardless of the configuration, the thermal capacitance medium filling space within the
pouch 4 is preferably uniformly distributed. Where a gel is used, an even amount about 3 mm to 10 mm on each side of thepouch 4 is preferred. Utilizing about 12-20 fluid oz., preferably 16 fluid oz., of medium 24 (such as a gel) for a hydration pouch having a capacity of about 70 fluid oz. insures adequate heat/cold capacity. Still, it is to be understood that other configurations and sizing of thepouch 4 are within the scope of the invention. - Figure 2B shows a second variation of the
inventive pouch 4 where aninner sleeve 34 is surrounded by anouter sleeve 36 to provide the inner and outer layers forming the desireddrinking fluid compartment 30 andmedium space 32. As shown by the darkened bars, theend sections 38 of thesleeves outer sleeve 36 may be joined to theinner sleeve 34 at some distance from theend sections 38. As with the bags of the variation shown in Figure 2A, the sleeves used in this variation of the invention may be formed from sheets of material. - As shown in Figure 2C, the
inventive pouch 4 may also be made from sheets orpanels 40 of material without first forming such sheets into bags or sleeves. Here, thecompartment 30 between the inner layers and thespaces 32 between the inner and outer layers are formed between thesheets 40 welded or joined, around theperiphery 42 of thepouch 4. Alternately,smaller panels 40 to form space for the coolingmedium 24 may be joined to the inner layer or layers of the pouch inboard theedge 42. Furthermore, more than onereceptacle space 32 for coolingmaterial 24 may be formed on a given side of thepouch 4. In all variations of theinventive pouch 4, where the entireinterior compartment 30 is not surrounded by medium 24 as depicted in Figures 2A-2C, the structure provided to receive medium 24 will be configured so that it substantially surrounds or covers theinterior compartment 30. This means at least half of the surface area of thecompartment 30 is in contact withmedium 24. More preferably, three-quarters or more of the surface will be covered. Most preferably, all, or significantly all the surface of thedrinking fluid compartment 30 is surrounded by or in contact with the thermal medium. Therefore, while only one side of each of the variations shown in Figures 2A-2C is shown, it is to be understood that both sides should include medium 24. - Furthermore, in all variations of the invention, provision is made to close the
interior compartment 30 of thepouch 4 in order to avoid the escape of drinking liquid. A friction-fitremovable cap 18 is preferred for a Camelback®type arrangement. Alternately, a screw-type cap assembly may be preferred. Whatever the case, the cap or any fitting associated with the same should open only to theinterior compartment 30. Any outer bladder, receptacle orcompartment 32 for receivingmedium 24 is isolated from the opening of thepouch 4 by welding or another barrier such as a layer of silicone. Similarly, where aconduit 12 is provided to evacuate thepouch 4, the opening to the conduit or any fitting associated with the same should open only to the interior 30. - It is to be understood that the gel-filled
sections 32 of thepouch 4 may be left inviolate or may be interrupted. Such sections may be interrupted by structures preferably provided by welding the inner andouter layers 44 of the pouch together. Such interruption assists in maintaining even distribution of coolingmedium 24, a matrix of circles ordots 46 as shown in Figure 3A may be most effective in this regard. Alternately, one or morestriped sections 48 as shown in Figure 3B may be provided. Naturally, the orientation, width or other parameters of the striping may be varied. - The use of elongate breaks or
striations 48 in the coverage of the cooling medium may be particularly providing the pouch with flexibility since,gaps 50 in the coverage of the coolingmedium 24 may act somewhat like a hinge. In a similar vein, where multiple pockets orreceptacles 32 are to be provided to hold cooling and/or heating material, they may also be arranged to promote flexibility or filling of thepouch 4. In either instance, breaks in the coverage of the thermal medium of theinterior compartment 30 should not be so great as to significantly reduce the capacity to cool and/or heat or maintain drinking fluid at an acceptably low or high temperature. Accordingly, the medium-coverage parameters discussed above should be observed. - Figures 4A and 4B show cross-sectional configurations useable with any of the variations of the
pouch 4 of the present invention. The pouch may have a simple two-sided bladder shape as shown in Figures 4A. Alternately, it may include one or more expansion sections orpleats 52 adjacent to the opposite sides of thepouch 4 as shown in Figure 4B. Each configuration is advantageous in that it will more easily collapse in a flattened manner upon draining than other shapes. Each cross section shows thedrinking fluid compartment 30 and areas that may be filled with coolingmedium 24. - It is contemplated that the
inventive bladder 4 may have other cross-sectional shapes as deemed convenient for the setting in which it is to be employed. For example, it may be rounded (e.g., circular, elliptical, ovolaid or oblong) or rectilinear (e.g., square or rectangular). Also, thepouch 4 may have a differing plan view than those depicted in Figures 2A-2C. For instance, instead of having a projected view that is basically rectangular as shown, it may be configured substantially in the form of a square, circle, another regular geometric shape or otherwise depending on its intended use.Regardless of the configuration of thepouch 4, a sling, sidepack or type of bag other than that shown in Figure 1 may be preferred to house thepouch 4. In addition, it is contemplated that the inventive pouch may be configured to integrally include carrying structure(s) such as strap(s), a belt, sling or harness. Optional housings or carrying structures are illustrated in the references listed above. - Finally, it is noted that this invention has been described and specific examples of the invention have been portrayed. The use of those specific examples is not intended to limit the invention; only the appended claims shall do so. Additionally, to the extent that there are variations of the invention, which are within the spirit of the disclosure and/or are equivalent to features found in the claims, it is intended that the claims cover those variations as well. All equivalents are considered to be within the scope of the claimed invention, even those which may not have been set forth herein merely for the sake of brevity. The disclosure of each of the patents cited above is incorporated by reference herein in its entirety.
Claims (9)
1. A hydration system comprising a flexible pouch including a plurality of layers forming at least two compartments, at least one of said compartments being filled with a thermal capacitance medium.
2. The system of claim 1 , wherein said pouch is formed by joined sheets of material.
3. The system of claim 1 , wherein said pouch is formed by a first bag surrounded at least partially by the second bag.
4. The system of claim 1 , wherein said pouch is formed by a first sleeve surrounded at least partially by a second sleeve.
5. The system of claim 1 , wherein said medium consists of a cooling medium.
6. The system of claim 1 , wherein said medium consists of heating medium.
7. The system of claim 1 , further comprising a conduit having an inlet and an outlet, said inlet being in fluid communication with a compartment for drinking fluid.
8. The system of claim 7 , further comprising a value at said conduit outlet.
9. The system of claim 8 , further comprising a pack configured to receive said pouch and be wearable by a user.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65381600A | 2000-09-01 | 2000-09-01 | |
PCT/US2001/027285 WO2002017745A1 (en) | 2000-09-01 | 2001-08-31 | Hydration pouch with integral thermal medium |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
WOUS0127285 Continuation | 2001-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020113101A1 true US20020113101A1 (en) | 2002-08-22 |
Family
ID=24622406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/043,657 Abandoned US20020113101A1 (en) | 2000-09-01 | 2002-01-08 | Hydration pouch with integral thermal medium |
Country Status (5)
Country | Link |
---|---|
US (1) | US20020113101A1 (en) |
AU (1) | AU2001288642A1 (en) |
CA (1) | CA2420018A1 (en) |
GB (1) | GB2382978B (en) |
WO (1) | WO2002017745A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
WO2002017745A9 (en) | 2003-04-03 |
GB0305891D0 (en) | 2003-04-16 |
AU2001288642A1 (en) | 2002-03-13 |
GB2382978B (en) | 2004-06-30 |
CA2420018A1 (en) | 2002-03-07 |
WO2002017745A1 (en) | 2002-03-07 |
GB2382978A (en) | 2003-06-18 |
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