CA2415776A1 - Thermoinsulating knapsack - Google Patents
Thermoinsulating knapsack Download PDFInfo
- Publication number
- CA2415776A1 CA2415776A1 CA002415776A CA2415776A CA2415776A1 CA 2415776 A1 CA2415776 A1 CA 2415776A1 CA 002415776 A CA002415776 A CA 002415776A CA 2415776 A CA2415776 A CA 2415776A CA 2415776 A1 CA2415776 A1 CA 2415776A1
- Authority
- CA
- Canada
- Prior art keywords
- thermoinsulating
- knapsack
- container
- knapsack according
- panels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/10—Insulation with respect to heat
- F25D2201/14—Insulation with respect to heat using subatmospheric pressure
Landscapes
- Packages (AREA)
- Portable Outdoor Equipment (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Catching Or Destruction (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
- Thermally Insulated Containers For Foods (AREA)
- Devices For Warming Or Keeping Food Or Tableware Hot (AREA)
- Thermal Insulation (AREA)
Abstract
The present invention relates to a thermoisulating knapsack for carrying beverages, comprising a sack (1) provided with straps (2) for transportation on the back, inside which is arranged a container (3) for a beverage. Said container (3) is provided with an opening into which is inserted a flexible tube (4) which enables teh berverage to be sorbed. One or more evacuated panels (5, 6) comprising an envelope which encloses powder of an inert material with average particle size lower than 100 nanometers are arranged between said sack (1) and said container (3).
Description
"THERMOINSLTLATING K1VAPSACK"
The present invention relates to a knapsack for sportsmen, suitable for carrying water or other beverages while maintaining constant their temperature and for drinking said beverages without having to take the knapsack off.
It is known that the people who train a sport activity for a long period of time need to drink frequently in order to avoid becoming dehydrated. Since some kinds of activities, such as cycling, keep constantly busy the hands of the sportsman, a knapsack has been devised which internally comprises a container to for a beverage. Said container is provided with a thin tube through which the beverage can be sorbed by the sportsman, so that he can drink without having to stop his activity. The knapsack can be thermally insulated by means of fibrous insulators, such as glass wool or rock wool.
However, the insulating features of these materials are not sufficient for is maintaining constant the temperature of the beverage for a long period of time.
In order to obviate this problem, it was thought to manufacture the thermal insulation of the knapsack by using thermoinsulating evacuated panels of the known type, for example those formed of a board of open-cells polymeric foam contained in an evacuated envelope.
2U However, these panels are rigid and can be with difficulty adjusted to the walls of the knapsack that preferably has an anatomical and optionally non-rigid shape, with a higher volume when it is fzlled of the beverage and a progressively decreasing volume when the beverage is consumed.
Further, since a substantial requirement of said envelope is a high gas-25 tightness, it is formed of barrier sheets containing aluminum layers which confer to the envelope itself a certain fragility. Therefore, said panels should be placed inside a preferably rigid protective structure in order to avoid the cracking of the envelopes which would compromise the thermal insulation properties of the panels.
3o Therefore, object of the present invention is providing a thermoinsulating knapsack which is free from the above mentioned drawbacks. Said object is achieved by means of a thermoinsulating knapsack whose main features are specified in the fir st claim and other features are specified in the following claims.
The panels used for the thermal insulation of the knapsack according to the present invention employ, as a filling material, a powder of an inert material having average particle size lower than 100 nanometers (nm) and preferably comprised between about 2 and 20 nanometers. It has been found that by the use of these powders, the thermal conductance of the panels varies only slightly, and particularly remains lower than about 8 mW/m~K, for internal pressures up to a few tens of mbar, differently from the panels based on polymeric foams wherein to the thermal conductance grows rapidly when the internal pressure. is higher than about 1 mbar. For this reason, it is possible to maintain pressures even higher than mbar inside the evacuated panels according to the invention, so that it is not necessary to use envelopes which contain aluminum sheets, necessary above all in the applications at high temperature. This particular measure, which reduces at negligible values the thermal bridge, enables the nearly total utilization of the insulating pr operties of the filling material of the evacuated panels according to the invention. Due to their very reduced size, the particles of the powders can form, because of cohesive or electrostatic forces, aggregates having size of a few micrometers (p,m) or even higher, without causing variations of the thermal 2o insulation properties of the panels.
By using as a filling a block of very fine powder of an inert material, it is possible to obtain evacuated panels which can be bent or curved, so that they can be adapted to the anatomical shape of the knapsack inside which they have to be inserted, as well as to the eventual variations of shape and volume of the container when it is filled or emptied of the beverage.
Further, thanks to their envelope being formed of a plastic multilayer comprising no aluminum layers, the evacuated panels used for the thermoinsulating knapsack according to the present invention are more solid than the known panels based on polymeric foams and can be placed inside the same knapsack without providing a protective structure suitable for preventing the accidental cracking of the envelopes.
The present invention relates to a knapsack for sportsmen, suitable for carrying water or other beverages while maintaining constant their temperature and for drinking said beverages without having to take the knapsack off.
It is known that the people who train a sport activity for a long period of time need to drink frequently in order to avoid becoming dehydrated. Since some kinds of activities, such as cycling, keep constantly busy the hands of the sportsman, a knapsack has been devised which internally comprises a container to for a beverage. Said container is provided with a thin tube through which the beverage can be sorbed by the sportsman, so that he can drink without having to stop his activity. The knapsack can be thermally insulated by means of fibrous insulators, such as glass wool or rock wool.
However, the insulating features of these materials are not sufficient for is maintaining constant the temperature of the beverage for a long period of time.
In order to obviate this problem, it was thought to manufacture the thermal insulation of the knapsack by using thermoinsulating evacuated panels of the known type, for example those formed of a board of open-cells polymeric foam contained in an evacuated envelope.
2U However, these panels are rigid and can be with difficulty adjusted to the walls of the knapsack that preferably has an anatomical and optionally non-rigid shape, with a higher volume when it is fzlled of the beverage and a progressively decreasing volume when the beverage is consumed.
Further, since a substantial requirement of said envelope is a high gas-25 tightness, it is formed of barrier sheets containing aluminum layers which confer to the envelope itself a certain fragility. Therefore, said panels should be placed inside a preferably rigid protective structure in order to avoid the cracking of the envelopes which would compromise the thermal insulation properties of the panels.
3o Therefore, object of the present invention is providing a thermoinsulating knapsack which is free from the above mentioned drawbacks. Said object is achieved by means of a thermoinsulating knapsack whose main features are specified in the fir st claim and other features are specified in the following claims.
The panels used for the thermal insulation of the knapsack according to the present invention employ, as a filling material, a powder of an inert material having average particle size lower than 100 nanometers (nm) and preferably comprised between about 2 and 20 nanometers. It has been found that by the use of these powders, the thermal conductance of the panels varies only slightly, and particularly remains lower than about 8 mW/m~K, for internal pressures up to a few tens of mbar, differently from the panels based on polymeric foams wherein to the thermal conductance grows rapidly when the internal pressure. is higher than about 1 mbar. For this reason, it is possible to maintain pressures even higher than mbar inside the evacuated panels according to the invention, so that it is not necessary to use envelopes which contain aluminum sheets, necessary above all in the applications at high temperature. This particular measure, which reduces at negligible values the thermal bridge, enables the nearly total utilization of the insulating pr operties of the filling material of the evacuated panels according to the invention. Due to their very reduced size, the particles of the powders can form, because of cohesive or electrostatic forces, aggregates having size of a few micrometers (p,m) or even higher, without causing variations of the thermal 2o insulation properties of the panels.
By using as a filling a block of very fine powder of an inert material, it is possible to obtain evacuated panels which can be bent or curved, so that they can be adapted to the anatomical shape of the knapsack inside which they have to be inserted, as well as to the eventual variations of shape and volume of the container when it is filled or emptied of the beverage.
Further, thanks to their envelope being formed of a plastic multilayer comprising no aluminum layers, the evacuated panels used for the thermoinsulating knapsack according to the present invention are more solid than the known panels based on polymeric foams and can be placed inside the same knapsack without providing a protective structure suitable for preventing the accidental cracking of the envelopes.
According to a particular aspect.of the invention, the inert material of the powder is silica preferably mixed with mineral fibers, so that it can be easily compressed in order to make blocks of even a few millimeter thickness, which can be placed in an envelope, evacuated and subsequently curved with relative ease.
Further advantages and features of the knapsack according to the present invention will appear to those which are skilled in the art from the following detailed description of one embodiment thereof with reference to the accompanying drawings, wherein:
- Figure 1 shows a perspective view of the complete thermoinsulating to lmapsack according to said embodiment; and - Figure 2 shows a perspective view of the knapsack of figure 1 from which the external sack has been removed.
With reference to figure 1, there is shown that the knapsack according to said embodiment of the present invention comprises a sack 1 made of a flexible material, for example fabric, provided with two straps 2 for transportation on the back. Inside said sack 1 is positioned a container 3 made of a liquid-tight material, suitable far containing water or another refreshing beverage. Said container is completely closed with the exception of a small upper opening suitable for enabling the corning out of the drink by means of a small tube 4 having the 2o function of a straw. As a matter of fact, one end of said tube 4 is immersed into the beverage inside the container, whereas the other end is inserted between the lips of the sportsman when he wishes to drink.
In the present embodiment the container 3 is formed of an envelope made of a~ flexible material, for instance plastic sheets, but the use of any other material known for containing alimentary ' beverages can be involved in other embodiments.
Tube 4 can be fastened at the central portion thereof to one of the straps 2 so that it is always within the reach of the sportsman.
With reference to figure 2, two evacuated, slightly curved panels 5 and 6 are 3o shown to be positioned externally of container 3. Said panels are arranged side by side so that together they form a substantially tubular body whose cavity is occupied by container 3. Besides, the two evacuated panels 5 and 6 can be f~.stened to one another by gluing or welding in pairs their lateral flanges.
Evacuated panels 5 and 6 have a thickness comprised for example between 4 and 15 mm and are formed of an envelope of a laminated plastic, optionally metallized, wherein a very fine powder of an inert material is enclosed, particularly silica. The plastic material used for the envelope can be any known material which is considered to be suitable for the construction of evacuated panels of traditional type, for example a polyolefin. The pressure inside the envelope is lower than 50 mbar, whereas the silica powder is preferably mixed to with mineral fibers, particularly glass fiber. The silica is preferably pyrogenic silica, a form of silica which is obtained by burning SiCl4 with oxygen in a suitable chamber, according to the reaction:
SiCIø '~- OZ ~ S1O2 -F- 2 Cl2 The silica produced in this reaction is in the form of particles of size comprised between a few nanometers and a few tens of nanometers, which can optionally be agglomerated to form particles of bigger size, as previously described. Pyrogenic silica is produced and sold for instance by tile US
company CABOT Corp. under the name Nanogel~ or by the German company Waclcer GmbH.
2o In the present embodiment the internal space of the sack 1 is completely occupied by container 3 and by insulating panels 5 and 6 placed around it, but in other embodiments said sack 1 could be provided with more compartnnents and lateral pockets so as to sezve for the transportation of other objects or food, further to the beverage.
Further variations andlor additions can be made by those which are skilled in the art to the described and illustrated embodiment by remaining within the limits of the invention itself. .
Further advantages and features of the knapsack according to the present invention will appear to those which are skilled in the art from the following detailed description of one embodiment thereof with reference to the accompanying drawings, wherein:
- Figure 1 shows a perspective view of the complete thermoinsulating to lmapsack according to said embodiment; and - Figure 2 shows a perspective view of the knapsack of figure 1 from which the external sack has been removed.
With reference to figure 1, there is shown that the knapsack according to said embodiment of the present invention comprises a sack 1 made of a flexible material, for example fabric, provided with two straps 2 for transportation on the back. Inside said sack 1 is positioned a container 3 made of a liquid-tight material, suitable far containing water or another refreshing beverage. Said container is completely closed with the exception of a small upper opening suitable for enabling the corning out of the drink by means of a small tube 4 having the 2o function of a straw. As a matter of fact, one end of said tube 4 is immersed into the beverage inside the container, whereas the other end is inserted between the lips of the sportsman when he wishes to drink.
In the present embodiment the container 3 is formed of an envelope made of a~ flexible material, for instance plastic sheets, but the use of any other material known for containing alimentary ' beverages can be involved in other embodiments.
Tube 4 can be fastened at the central portion thereof to one of the straps 2 so that it is always within the reach of the sportsman.
With reference to figure 2, two evacuated, slightly curved panels 5 and 6 are 3o shown to be positioned externally of container 3. Said panels are arranged side by side so that together they form a substantially tubular body whose cavity is occupied by container 3. Besides, the two evacuated panels 5 and 6 can be f~.stened to one another by gluing or welding in pairs their lateral flanges.
Evacuated panels 5 and 6 have a thickness comprised for example between 4 and 15 mm and are formed of an envelope of a laminated plastic, optionally metallized, wherein a very fine powder of an inert material is enclosed, particularly silica. The plastic material used for the envelope can be any known material which is considered to be suitable for the construction of evacuated panels of traditional type, for example a polyolefin. The pressure inside the envelope is lower than 50 mbar, whereas the silica powder is preferably mixed to with mineral fibers, particularly glass fiber. The silica is preferably pyrogenic silica, a form of silica which is obtained by burning SiCl4 with oxygen in a suitable chamber, according to the reaction:
SiCIø '~- OZ ~ S1O2 -F- 2 Cl2 The silica produced in this reaction is in the form of particles of size comprised between a few nanometers and a few tens of nanometers, which can optionally be agglomerated to form particles of bigger size, as previously described. Pyrogenic silica is produced and sold for instance by tile US
company CABOT Corp. under the name Nanogel~ or by the German company Waclcer GmbH.
2o In the present embodiment the internal space of the sack 1 is completely occupied by container 3 and by insulating panels 5 and 6 placed around it, but in other embodiments said sack 1 could be provided with more compartnnents and lateral pockets so as to sezve for the transportation of other objects or food, further to the beverage.
Further variations andlor additions can be made by those which are skilled in the art to the described and illustrated embodiment by remaining within the limits of the invention itself. .
Claims (9)
1. Thermoinsulating knapsack for carrying beverages, comprising a sack (1) provided with straps (2) for transportation on the back inside which is arranged a container (3) for a beverage provided with an opening into which is inserted a flexible tube (4) which enables the beverage to be sorbed, characterized in that one or more evacuated panels (5, 6) comprising an envelope which encloses powder of an inert material with average particle size lower than 100 nanometers are arranged between said sack (1) and said container (3).
2. Thermoinsulating knapsack according to the preceding claim, characterized in that the particles of the powder of inert material have an average size comprised between 2 and 20 manometers.
3. Thermoinsulating knapsack according to one of the preceding claims, characterized in that the envelope is made of a plastic, optionally metallized material.
4. Thermoinsulating knapsack according to one of the preceding claims, characterized in that the powder of inert material is mixed with mineral fibers.
5. Thermoinsulating knapsack according to the preceding claim, characterized in that said mineral fibers are glass fibers.
6. Thermoinsulating knapsack according to one of the preceding claims, characterized in that said inert material. is silica.
7. Thermoinsulating knapsack according to the preceding claim, characterized in that the silica is pyrogenic silica.
8. Thermoinsulating knapsack according to the preceding claim, characterized in that said evacuated panels (5, 6) have a thickness comprised between 4 and 15 mm.
9. Thermoinsulating knapsack according to one of the preceding claims, characterized in that said evacuated panels (5, 6) are two and that they are curved and mutually fastened by means of their flanges so that together they form a tubular body whose cavity is occupied by the container (3).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2000MI001902A IT1318684B1 (en) | 2000-08-23 | 2000-08-23 | THERMAL INSULATION BACKPACK. |
| ITMI2000A001902 | 2000-08-23 | ||
| PCT/IT2001/000398 WO2002015737A1 (en) | 2000-08-23 | 2001-07-25 | Thermoinsulating knapsack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2415776A1 true CA2415776A1 (en) | 2002-02-28 |
Family
ID=11445728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002415776A Abandoned CA2415776A1 (en) | 2000-08-23 | 2001-07-25 | Thermoinsulating knapsack |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20030127475A1 (en) |
| EP (1) | EP1311172A1 (en) |
| JP (1) | JP2004506461A (en) |
| KR (1) | KR20030024902A (en) |
| CN (1) | CN1447661A (en) |
| AU (1) | AU2001277691A1 (en) |
| CA (1) | CA2415776A1 (en) |
| IT (1) | IT1318684B1 (en) |
| TW (1) | TW510783B (en) |
| WO (1) | WO2002015737A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2405084B (en) * | 2003-07-25 | 2006-05-24 | Bw Technologies Ltd | Drinking fluid carriers |
| US8889248B2 (en) * | 2008-10-31 | 2014-11-18 | Sabic Global Technologies B.V. | Multiwall sheet, an article, a method of making a multiwall sheet |
| US8839996B2 (en) * | 2009-11-04 | 2014-09-23 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and methods for fluid storage and delivery |
| US20130017361A1 (en) * | 2011-07-12 | 2013-01-17 | Sabic Innovative Plastics Ip B.V. | Multiwall sheet, methods of making, and articles comprising the multiwall sheet |
| AP2014007633A0 (en) * | 2011-10-27 | 2014-05-31 | Greif Flexibles Trading Holding Bv | Portable water backpack |
| ES2499116B1 (en) * | 2013-03-26 | 2015-07-02 | Fº JAVIER PORRAS VILA | Portable water tube, for athletes |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636415A (en) * | 1985-02-08 | 1987-01-13 | General Electric Company | Precipitated silica insulation |
| US5106520A (en) * | 1985-11-22 | 1992-04-21 | The University Of Dayton | Dry powder mixes comprising phase change materials |
| US5085349A (en) * | 1990-02-08 | 1992-02-04 | Fawcett Roger R | Resilient valve and dispensing system for bicyclists |
| US5399397A (en) * | 1993-04-21 | 1995-03-21 | Martin Marietta Energy Systems, Inc. | Calcium silicate insulation structure |
| US5465885A (en) * | 1994-04-25 | 1995-11-14 | Wyatt; William R. | Insulated backpack with drinking liquid container |
| US5950450A (en) * | 1996-06-12 | 1999-09-14 | Vacupanel, Inc. | Containment system for transporting and storing temperature-sensitive materials |
| FR2755159B1 (en) * | 1996-10-28 | 1999-01-15 | Panhelleux Gerard Marcel Patri | SELF-SUPPORTING INSULATING PANEL |
| US5975387A (en) * | 1997-07-11 | 1999-11-02 | K 2 Corporation | Bladder frame backpack |
| AU2001288642A1 (en) * | 2000-09-01 | 2002-03-13 | Jeff Skillern | Hydration pouch with integral thermal medium |
-
2000
- 2000-08-23 IT IT2000MI001902A patent/IT1318684B1/en active
-
2001
- 2001-07-24 TW TW090118079A patent/TW510783B/en not_active IP Right Cessation
- 2001-07-25 AU AU2001277691A patent/AU2001277691A1/en not_active Abandoned
- 2001-07-25 KR KR10-2003-7002555A patent/KR20030024902A/en not_active Application Discontinuation
- 2001-07-25 CA CA002415776A patent/CA2415776A1/en not_active Abandoned
- 2001-07-25 EP EP01955533A patent/EP1311172A1/en not_active Withdrawn
- 2001-07-25 JP JP2002520658A patent/JP2004506461A/en active Pending
- 2001-07-25 WO PCT/IT2001/000398 patent/WO2002015737A1/en not_active Application Discontinuation
- 2001-07-25 CN CN01814499A patent/CN1447661A/en active Pending
-
2003
- 2003-02-19 US US10/369,068 patent/US20030127475A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030024902A (en) | 2003-03-26 |
| WO2002015737A1 (en) | 2002-02-28 |
| WO2002015737A8 (en) | 2003-04-10 |
| EP1311172A1 (en) | 2003-05-21 |
| JP2004506461A (en) | 2004-03-04 |
| US20030127475A1 (en) | 2003-07-10 |
| ITMI20001902A1 (en) | 2002-02-23 |
| IT1318684B1 (en) | 2003-08-27 |
| AU2001277691A1 (en) | 2002-03-04 |
| ITMI20001902A0 (en) | 2000-08-23 |
| TW510783B (en) | 2002-11-21 |
| CN1447661A (en) | 2003-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |