WO2002017745A9 - Hydration pouch with integral thermal medium - Google Patents
Hydration pouch with integral thermal mediumInfo
- Publication number
- WO2002017745A9 WO2002017745A9 PCT/US2001/027285 US0127285W WO0217745A9 WO 2002017745 A9 WO2002017745 A9 WO 2002017745A9 US 0127285 W US0127285 W US 0127285W WO 0217745 A9 WO0217745 A9 WO 0217745A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pouch
- medium
- hydration
- conduit
- fluid
- Prior art date
Links
Classifications
-
- 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
-
- 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
-
- 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.
- 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.
- 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 one or both sides include pocket(s) or panel(s) 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 within the 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.
- Figures 3 A 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 inventive system may include a pack 2 adapted to house a hydration pouch 4.
- a pack 2 adapted to house a hydration 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 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.
- Conduit 12 may be insulated.
- a neoprene sleeve such as produced by Lizards Skins (Pleasant Grove UT) may be used.
- 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.
- the pouch may further 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.
- 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 mamtaining 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.
- FIG 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. Preferably they will be made of similar material so welding may easily join them.
- 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 heal 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.
- a compartment 30 for ⁇ inking fluid is provided with space(s) 32 for cooling medium provided on only one side of the fluid compartment
- the structure provided to receive medium 24 will be configured so that it substantially surrounds or covers the interior compartment 30. This means at least one-third to half of the surface area of the compartment 30 is in contact with medium 24. More preferably, three-quarters or more of the surface will be covered. 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 or one side should be largely covered.
- 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 3 A 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. 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 cooling medium 24 may act somewhat like a hinge.
- 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. 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.
- the pouch 4 may be rounded (e.g., circular, elliptical, ovolaid or oblong) or rectilinear (e.g., square or rectangular).
- the pouch 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.
- a sling, sidepack or type of bag other than that shown in Figure 1 may be preferred to house the pouch 4.
- the 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
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002420018A CA2420018A1 (en) | 2000-09-01 | 2001-08-31 | Hydration pouch with integral thermal medium |
GB0305891A GB2382978B (en) | 2000-09-01 | 2001-08-31 | Hydration pouch with integral thermal medium |
AU2001288642A AU2001288642A1 (en) | 2000-09-01 | 2001-08-31 | Hydration pouch with integral thermal medium |
US10/043,657 US20020113101A1 (en) | 2000-09-01 | 2002-01-08 | Hydration pouch with integral thermal medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65381600A | 2000-09-01 | 2000-09-01 | |
US09/653,816 | 2000-09-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002017745A1 WO2002017745A1 (en) | 2002-03-07 |
WO2002017745A9 true WO2002017745A9 (en) | 2003-04-03 |
Family
ID=24622406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/027285 WO2002017745A1 (en) | 2000-09-01 | 2001-08-31 | 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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US5941640A (en) * | 1997-08-14 | 1999-08-24 | Ultimate Direction, Inc. | Roll top bladder |
US5940880A (en) * | 1997-12-12 | 1999-08-24 | Bio Targeting, Inc. | Apparatus and method for providing coolant water to the head during exercise |
US6039305A (en) * | 1998-01-21 | 2000-03-21 | K-2 Corporation | Bite valve for hydration bladder |
US6070767A (en) * | 1998-07-17 | 2000-06-06 | Camelbak Products, Inc. | Personal hydration system with an improved mouthpiece |
US6094935A (en) * | 1999-01-15 | 2000-08-01 | Stein; Hal | Drinking receptacle with removable chilling liner |
GB2361174A (en) * | 2000-04-11 | 2001-10-17 | Paul Bays | Aerodynamic rucksack |
US6422032B1 (en) * | 2001-01-24 | 2002-07-23 | Gary Keith Greene | Reusable cooler bag |
US6474095B1 (en) * | 2001-10-17 | 2002-11-05 | Kado Industrial Co., Ltd. | Collapsible container |
US6925834B2 (en) * | 2003-09-13 | 2005-08-09 | Mark D. Fuchs | Portable cooler including ice sheet having refrigerant cubes |
-
2001
- 2001-08-31 WO PCT/US2001/027285 patent/WO2002017745A1/en active Application Filing
- 2001-08-31 GB GB0305891A patent/GB2382978B/en not_active Expired - Fee Related
- 2001-08-31 AU AU2001288642A patent/AU2001288642A1/en not_active Abandoned
- 2001-08-31 CA CA002420018A patent/CA2420018A1/en not_active Abandoned
-
2002
- 2002-01-08 US US10/043,657 patent/US20020113101A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
GB2382978B (en) | 2004-06-30 |
AU2001288642A1 (en) | 2002-03-13 |
US20020113101A1 (en) | 2002-08-22 |
GB0305891D0 (en) | 2003-04-16 |
GB2382978A (en) | 2003-06-18 |
WO2002017745A1 (en) | 2002-03-07 |
CA2420018A1 (en) | 2002-03-07 |
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