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

Definitions

• 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.
• a knapsack which internally comprises a container for a beyerage. 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.
• the insulating features of these materials are not sufficient for maintaining constant the temperature of the beverage for a long period of time.
• thermoinsulating evacuated panels of the known type, for example those formed of a board of open-cells polymeric foam contained in an evacuated envelope.
• 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 filled of the beverage and a progressively decreasing volume when the beverage is consumed.
• 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 first 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 the thermal conductance grows rapidly when the internal pressure is higher than about 1 mbar.
• 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.
• 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 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.
• FIG. 1 shows a perspective view of the complete thermoinsulating knapsack according to said embodiment
• Figure 2 shows a perspective view of the knapsack of figure 1 from which the external sack has been removed.
• a container 3 made of a liquid-tight material, suitable for containing water or another refreshing beverage.
• Said container is completely closed with the exception of a small upper opening suitable for enabling the coming out of the drink by means of a small tube 4 having the function of a straw.
• a small tube 4 having the function of a straw.
• 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.
• two evacuated, slightly curved panels 5 and 6 are 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 fastened to one another by gluing or welding in pairs their lateral flanges.
• Evacuated panels 5 and 6 have a thickness comprised for example between
• 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 with mineral fibers, particularly glass fiber.
• the silica is preferably pyrogenic silica, a form of silica which is obtained by burning SiCl with oxygen in a suitable chamber, according to the reaction:
• 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 the US company
• 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 compartments and lateral pockets so as to serve for the transportation of other objects or food, further to the beverage. Further variations and/or 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.

Landscapes

• Packages (AREA)
• Portable Outdoor Equipment (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)
• Thermal Insulation (AREA)
• Catching Or Destruction (AREA)
• Thermally Insulated Containers For Foods (AREA)
• Devices For Warming Or Keeping Food Or Tableware Hot (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (2)

Family

ID=11445728

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (5)

Citations (4)

Family Cites Families (5)

• 2000
  • 2000-08-23 IT IT2000MI001902A patent/IT1318684B1/it active
• 2001
  • 2001-07-24 TW TW090118079A patent/TW510783B/zh not_active IP Right Cessation
  • 2001-07-25 KR KR10-2003-7002555A patent/KR20030024902A/ko not_active Application Discontinuation
  • 2001-07-25 JP JP2002520658A patent/JP2004506461A/ja active Pending
  • 2001-07-25 CA CA002415776A patent/CA2415776A1/en not_active Abandoned
  • 2001-07-25 AU AU2001277691A patent/AU2001277691A1/en not_active Abandoned
  • 2001-07-25 WO PCT/IT2001/000398 patent/WO2002015737A1/en not_active Application Discontinuation
  • 2001-07-25 CN CN01814499A patent/CN1447661A/zh active Pending
  • 2001-07-25 EP EP01955533A patent/EP1311172A1/en not_active Withdrawn
• 2003
  • 2003-02-19 US US10/369,068 patent/US20030127475A1/en not_active Abandoned

Patent Citations (4)

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