US20080178743A1 - Device for preparing a beverage - Google Patents

Device for preparing a beverage Download PDF

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Publication number
US20080178743A1
US20080178743A1 US12/051,593 US5159308A US2008178743A1 US 20080178743 A1 US20080178743 A1 US 20080178743A1 US 5159308 A US5159308 A US 5159308A US 2008178743 A1 US2008178743 A1 US 2008178743A1
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Prior art keywords
chamber
water
reservoir
gas
valve
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Abandoned
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US12/051,593
Inventor
Karl Hug
Jean-Luc Denisart
Jean-Paul Denisart
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Nestec SA
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Nestec SA
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Publication date
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Priority to US12/051,593 priority Critical patent/US20080178743A1/en
Publication of US20080178743A1 publication Critical patent/US20080178743A1/en
Abandoned legal-status Critical Current

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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
    • A47J31/00—Apparatus for making beverages
    • A47J31/40—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea
    • A47J31/402—Liquid dosing devices

Definitions

  • the present invention relates to a device for preparing a beverage, said device having no pump.
  • Patent application WO 99/02081 relates to a system of this type for preparing a beverage from a displaceable cart.
  • This system is based on the principle that the displacement of hot water is generated by means of a compressed-gas cylinder.
  • the drawback of this device is that it is heavy and expensive.
  • the water and the pressurized-gas are in permanent contact, which leads to the gas diffusing into the water and producing sparkling water. This has an adverse effect on the taste of the beverage, in this instance on the coffee extracted.
  • An object of the present invention is to provide the consumer with a relatively lightweight, inexpensive device for preparing cups of coffee or other beverages with well-defined volumes, without adverse effects on taste.
  • the present invention relates to a device for preparing a beverage, comprising:
  • Extraction head is understood to mean, in the present description, any system based either on the dissolution of a material, or based on extraction, for example of tea, coffee and other substances.
  • extraction use is made of capsules, for example open capsules of the filter-paper-capsule type, or, also, of capsules forming the subject of patents in the name of the applicant, specifically EP 512 148 and EP 602 203.
  • the capsules may contain any type of soluble or extractable food product, for example roasted, ground coffee, soluble coffee, soluble cocoa, tea, dried substances for bouillons, or the like.
  • the chamber for delivering water has a volume of between 10 and 1000 cc, preferably between 50 and 150 cc.
  • the volume of the chamber is considered relative to the volume of the cupful to be prepared for the consumer.
  • the means for emptying water from the chamber are means using the pressure of the gas in order to empty said chamber.
  • These means are preferably hydraulic means.
  • hydraulic means use is preferably made of a piston displaced by compressed gas.
  • the means for filling said chamber with water are gravitation means or mechanical means. “Gravitation means” is understood to mean simply that the water fills the chamber under its own weight and pushes the piston, for example, back up.
  • Mechanisms is understood to mean either a spring, or a motor or a manual means.
  • the compressed gas is chosen from the group consisting of air, CO 2 or nitrogen monoxide.
  • the water reservoir is a thermally-insulated hot-water reservoir. Provision may also be made in one embodiment for a heating system to surround the chamber. It is also possible to make provision for a heating system between the chamber and the extraction head.
  • the shape of the chamber is not of critical importance.
  • the chamber has a substantially cylindrical shape.
  • a further advantage of the device according to the invention is that it is virtually silent.
  • FIG. 1 is a representation of the device in a first embodiment
  • FIGS. 2 to 5 are diagrammatic representations of the device in a second embodiment.
  • FIG. 6 is a diagrammatic representation according to a third embodiment.
  • the device comprises a water reservoir ( 1 ), a chamber ( 5 ) connected to said reservoir via the conduit ( 11 ), a heating system ( 7 ), a compressed-gas reservoir ( 2 ) and an extraction head ( 10 ).
  • the chamber ( 5 ) comprises a piston ( 16 ) moved by a spring ( 17 ).
  • the chamber ( 5 ) has a side ( 5 a ) for delivering compressed gas and a side ( 5 b ) for the entry of water.
  • the compressed-gas reservoir ( 2 ) is connected via the conduit ( 12 ) to the side ( 5 a ) and said conduit comprises a purge ( 3 ) and a valve ( 4 ).
  • the non-return valve ( 6 ) prevents any reflux of water from the chamber ( 5 ).
  • the conduit ( 13 ) leads to the heating system, which comprises a thermostat ( 8 ) and a heating body ( 9 ).
  • the conduit ( 4 ) leads to the extraction head.
  • the device operates as follows:
  • the valve ( 4 ) When the consumer wishes to make himself a coffee, the valve ( 4 ) is opened and placed in communication with the ambient air. As the side ( 5 a ) empties of air, the spring ( 17 ) relaxes and draws water from the water reservoir ( 1 ) to the side ( 5 b ). When the side ( 5 b ) is full, the valve ( 4 ) is placed in a position in which there is a link to the compressed-gas reservoir ( 2 ): the gas expands by virtue of ( 3 ) and displaces the piston ( 16 ) so as to displace the mass of water in the side ( 5 b ). The water passes via the non-return valve ( 18 ) into the heating system ( 7 ) and via the extraction head ( 10 ). The coffee is delivered to the cup ( 15 ). The machine is then ready for the next extraction.
  • the device in FIGS. 2 to 5 comprises a thermally-insulated hot-water reservoir ( 20 ), a chamber ( 29 ) connected to said reservoir via the conduit ( 21 ) that comprises a non-return valve ( 22 ), a compressed-gas reservoir ( 23 ), with expander ( 24 ), connected to the chamber ( 29 ) via the conduit ( 28 ).
  • the three-way valve ( 27 ) allows the compressed gas to be introduced into the chamber ( 29 ) or connection to the outside pressure.
  • the chamber ( 29 ) comprises a piston ( 30 ) with the latter's rod ( 31 ), and a valve release ( 35 ).
  • the mechanical trigger ( 32 ) immobilizes the piston in a position in which the spring ( 33 ) is compressed. After the exit from the chamber ( 29 ) there is the capsule ( 26 ) to be extracted arranged in the cartridge holder ( 25 ).
  • the device operates as follows:
  • valve ( 27 ) rocks in order to allow the compressed gas to enter via the release ( 24 ) through the conduit ( 28 ) in order to push the piston ( 30 ).
  • the volume of hot water at ( 38 ) opens the valve ( 36 ), arrives at the capsule ( 26 ) and the coffee flows into the cup ( 40 ).
  • the piston draws the rod ( 34 ) downward in the direction of the arrow G.
  • the valve ( 27 ) restores atmospheric pressure in the volume ( 37 ) and the trigger ( 32 ) again immobilizes the piston with the compressed spring ( 33 ). The machine is then ready for a further extraction.
  • the compressed-gas reservoir ( 23 ) normally has a volume of the order of . . . L.
  • the volume ( 38 ) corresponds to a cup volume of the order of 100 cc.

Abstract

The invention relates to a device for preparing a beverage, comprising: —a water reservoir (1); —a chamber (5) that is connected to said reservoir for delivering water; —means (17) for filling said chamber with water; —means (16) for emptying water from the chamber; —a compressed gas reservoir (2) with a three-way valve (4) for displacing said means so as to empty the chamber; and —a conduit (14) for conveying the water from the chamber to an extraction head.

Description

    BACKGROUND
  • The present invention relates to a device for preparing a beverage, said device having no pump.
  • In the technical field, there are already pump-less coffee machines for preparing beverages. Patent application WO 99/02081 relates to a system of this type for preparing a beverage from a displaceable cart. This system is based on the principle that the displacement of hot water is generated by means of a compressed-gas cylinder. The drawback of this device is that it is heavy and expensive. Furthermore, in this device, the water and the pressurized-gas are in permanent contact, which leads to the gas diffusing into the water and producing sparkling water. This has an adverse effect on the taste of the beverage, in this instance on the coffee extracted.
    • SUMMARY
  • An object of the present invention is to provide the consumer with a relatively lightweight, inexpensive device for preparing cups of coffee or other beverages with well-defined volumes, without adverse effects on taste.
  • The present invention relates to a device for preparing a beverage, comprising:
      • a water reservoir;
      • a chamber connected to said reservoir for delivering water;
      • means for filling said chamber with water;
      • means for emptying water from said chamber;
      • a compressed-gas reservoir with a three-way valve for displacing said means so as to empty said chamber; and
      • a conduit conveying the water from said chamber to above an extraction head.
  • “Extraction head” is understood to mean, in the present description, any system based either on the dissolution of a material, or based on extraction, for example of tea, coffee and other substances. In the case of extraction, use is made of capsules, for example open capsules of the filter-paper-capsule type, or, also, of capsules forming the subject of patents in the name of the applicant, specifically EP 512 148 and EP 602 203. The capsules may contain any type of soluble or extractable food product, for example roasted, ground coffee, soluble coffee, soluble cocoa, tea, dried substances for bouillons, or the like.
  • The chamber for delivering water has a volume of between 10 and 1000 cc, preferably between 50 and 150 cc. The volume of the chamber is considered relative to the volume of the cupful to be prepared for the consumer.
  • The means for emptying water from the chamber are means using the pressure of the gas in order to empty said chamber. These means are preferably hydraulic means. As hydraulic means, use is preferably made of a piston displaced by compressed gas.
  • The means for filling said chamber with water are gravitation means or mechanical means. “Gravitation means” is understood to mean simply that the water fills the chamber under its own weight and pushes the piston, for example, back up.
  • “Mechanical means” is understood to mean either a spring, or a motor or a manual means.
  • The compressed gas is chosen from the group consisting of air, CO2 or nitrogen monoxide.
  • The water reservoir is a thermally-insulated hot-water reservoir. Provision may also be made in one embodiment for a heating system to surround the chamber. It is also possible to make provision for a heating system between the chamber and the extraction head.
  • The shape of the chamber is not of critical importance. Preferably, the chamber has a substantially cylindrical shape.
  • A further advantage of the device according to the invention is that it is virtually silent.
  • Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures.
    • BRIEF DESCRIPTION OF THE FIGURES
  • The remainder of the description is given with reference to the drawings, in which:
  • FIG. 1 is a representation of the device in a first embodiment;
  • FIGS. 2 to 5 are diagrammatic representations of the device in a second embodiment; and
  • FIG. 6 is a diagrammatic representation according to a third embodiment.
    •  DETAILED DESCRIPTION
  • The device comprises a water reservoir (1), a chamber (5) connected to said reservoir via the conduit (11), a heating system (7), a compressed-gas reservoir (2) and an extraction head (10). The chamber (5) comprises a piston (16) moved by a spring (17). The chamber (5) has a side (5 a) for delivering compressed gas and a side (5 b) for the entry of water. The compressed-gas reservoir (2) is connected via the conduit (12) to the side (5 a) and said conduit comprises a purge (3) and a valve (4). The non-return valve (6) prevents any reflux of water from the chamber (5). The conduit (13) leads to the heating system, which comprises a thermostat (8) and a heating body (9). The conduit (4) leads to the extraction head.
  • The device operates as follows:
  • When the consumer wishes to make himself a coffee, the valve (4) is opened and placed in communication with the ambient air. As the side (5 a) empties of air, the spring (17) relaxes and draws water from the water reservoir (1) to the side (5 b). When the side (5 b) is full, the valve (4) is placed in a position in which there is a link to the compressed-gas reservoir (2): the gas expands by virtue of (3) and displaces the piston (16) so as to displace the mass of water in the side (5 b). The water passes via the non-return valve (18) into the heating system (7) and via the extraction head (10). The coffee is delivered to the cup (15). The machine is then ready for the next extraction.
  • The device in FIGS. 2 to 5 comprises a thermally-insulated hot-water reservoir (20), a chamber (29) connected to said reservoir via the conduit (21) that comprises a non-return valve (22), a compressed-gas reservoir (23), with expander (24), connected to the chamber (29) via the conduit (28). The three-way valve (27) allows the compressed gas to be introduced into the chamber (29) or connection to the outside pressure. The chamber (29) comprises a piston (30) with the latter's rod (31), and a valve release (35). The mechanical trigger (32) immobilizes the piston in a position in which the spring (33) is compressed. After the exit from the chamber (29) there is the capsule (26) to be extracted arranged in the cartridge holder (25).
  • The device operates as follows:
  • When the consumer wishes to make himself a coffee, he disengages the trigger (32) in the direction of the arrow B, which allows the spring (33) to relax (FIG. 3). The piston (30) rises in the direction of the arrow A. The air present at (37) exits in the direction of the arrow C in the conduit (28) and is evacuated via the valve (27) to the outside (arrow E). The water in the reservoir (20) is drawn through the valve (22) at (38). When the piston (30) rises, the valve release (35) pushes the rod (34) of the valve in the direction of the arrow F until there is no longer any air at (37) and a maximum volume is achieved for (38). At this point, the valve (27) rocks in order to allow the compressed gas to enter via the release (24) through the conduit (28) in order to push the piston (30). The volume of hot water at (38) opens the valve (36), arrives at the capsule (26) and the coffee flows into the cup (40). During extraction, the piston draws the rod (34) downward in the direction of the arrow G. At the end of the piston's travel (FIG. 5), the valve (27) restores atmospheric pressure in the volume (37) and the trigger (32) again immobilizes the piston with the compressed spring (33). The machine is then ready for a further extraction. Provision may be made for a reservoir (20) having a volume of the order of 1 or 2 litres. The compressed-gas reservoir (23) normally has a volume of the order of . . . L. The volume (38) corresponds to a cup volume of the order of 100 cc.
  • In the embodiment of FIG. 6, instead of hot water being provided, provision is made for a reservoir (41) containing cold water and a heating body (42). There is still a chamber (49) with a piston (47), a piston rod (46), a spring (45), a capsule (44) and a cartridge holder (43).
  • Operation is the same as previously, except that the heating body (42) will heat the cold water arriving via the conduit (50) through the valve (48) and arriving in the chamber (49). When the piston is in the high position, the compressed air (not shown) pushes the cold water into the conduit (51) through the valve (52) over the capsule (44). The coffee is recovered in a cup placed below.
  • It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.

Claims (23)

1. A device for preparing a beverage, comprising:
a water reservoir;
a chamber connected to the reservoir for delivering water;
means for filling the chamber with water comprising a spring that relaxes in order to retract a piston that causes a valve to move from a first to a second position;
means for emptying water from the chamber;
a reservoir comprising a valve for emptying water so as to empty the chamber; and
a conduit conveying the water from the chamber to above an extraction head.
2. The device as claimed in claim 1, wherein the chamber has a volume of between 10 and 1000 cc.
3. The device as claimed in claim 1, wherein the means for emptying water from the chamber comprises means using the pressure of a gas in order to empty the chamber.
4. The device as claimed in claim 1, wherein the means for filling the chamber with water comprise gravitation means.
5. The device as claimed in claim 3, wherein the gas is chosen from the group consisting of air, CO2 and nitrogen monoxide.
6. The device as claimed in claim 1, wherein the extraction head is a head for pre-measured filter-paper capsules.
7. The device as claimed in claim 1, wherein the water reservoir is a thermally-insulated hot-water reservoir.
8. The device as claimed in claim 1, comprising a heating system surrounding the chamber.
9. The device as claimed in claim 1, comprising a heating system between the chamber and the extraction head.
10. The device as claimed in claim 1, wherein the chamber has a substantially cylindrical shape.
11. The device as claimed in claim 1, wherein the chamber has a volume of between 50 and 150 cc.
12. The device as claimed in claim 1, wherein the means for filling said chamber with water are mechanical means.
13. The device as claimed in claim 1, wherein the extraction head is a head for sealed capsules.
14. A device for preparing a beverage, comprising:
a water reservoir;
a chamber coupled to the reservoir;
a spring and piston that are so constructed and arranged so that as the spring relaxes the piston causes a valve to move from a first to a second position;
a compressed-gas reservoir having a valve for emptying the chamber of water; and
a conduit conveying the water from the chamber to above an extraction head.
15. The device as claimed in claim 14, wherein the chamber has a volume of between 10 and 1000 cc.
16. The device as claimed in claim 14, wherein the water is emptied from the chamber using the pressure of the gas.
17. The device as claimed in claim 14, wherein the chamber is filled with water by gravitation means.
18. The device as claimed in claim 16, wherein the gas is chosen from the group consisting of air, CO2 and nitrogen monoxide.
19. The device as claimed in claim 14, wherein the extraction head is a head for pre-measured filter-paper capsules or sealed capsules.
20. The device as claimed in claim 14, wherein the water reservoir is a thermally-insulated hot-water reservoir.
21. The device as claimed in claim 14, comprising a heating system surrounding the chamber.
22. The device as claimed in claim 14, comprising a heating system between the chamber and the extraction head.
23. The device as claimed in claim 14, wherein the chamber has a substantially cylindrical shape.
US12/051,593 2002-08-06 2008-03-19 Device for preparing a beverage Abandoned US20080178743A1 (en)

Priority Applications (1)

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Applications Claiming Priority (5)

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CH2002/1367-2 2002-08-06
CH13672002 2002-08-06
US10/523,272 US7377207B2 (en) 2002-08-06 2003-08-05 Device for preparing a beverage
PCT/EP2003/008634 WO2004014205A1 (en) 2002-08-06 2003-08-05 Device for preparing a beverage
US12/051,593 US20080178743A1 (en) 2002-08-06 2008-03-19 Device for preparing a beverage

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US10/523,272 Continuation US7377207B2 (en) 2002-08-06 2003-08-05 Device for preparing a beverage
PCT/EP2003/008634 Continuation WO2004014205A1 (en) 2002-08-06 2003-08-05 Device for preparing a beverage

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US12/051,593 Abandoned US20080178743A1 (en) 2002-08-06 2008-03-19 Device for preparing a beverage

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EP (1) EP1565094B1 (en)
JP (1) JP4498137B2 (en)
CN (2) CN101099638A (en)
AT (1) ATE389346T1 (en)
AU (1) AU2003251690C1 (en)
BG (1) BG65572B1 (en)
BR (1) BR0313250A (en)
CA (1) CA2493392C (en)
DE (1) DE60319867T2 (en)
ES (1) ES2301861T3 (en)
IL (1) IL165811A (en)
MX (1) MXPA04012788A (en)
NO (1) NO20051640L (en)
PL (1) PL202937B1 (en)
PT (1) PT1565094E (en)
RU (1) RU2337602C2 (en)
WO (1) WO2004014205A1 (en)

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US20050241486A1 (en) 2005-11-03
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AU2003251690B2 (en) 2008-04-24
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WO2004014205A8 (en) 2005-01-20
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NO20051640L (en) 2005-02-28
RU2005106287A (en) 2005-09-20

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