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WO2000045686A1 - Electrical coffee-maker - Google Patents

Electrical coffee-maker Download PDF

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Publication number
WO2000045686A1
WO2000045686A1 PCT/EP2000/000892 EP0000892W WO0045686A1 WO 2000045686 A1 WO2000045686 A1 WO 2000045686A1 EP 0000892 W EP0000892 W EP 0000892W WO 0045686 A1 WO0045686 A1 WO 0045686A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical
boiler
coffee
base
maker
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.)
Ceased
Application number
PCT/EP2000/000892
Other languages
French (fr)
Inventor
Francesco Ranzoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bialetti Industrie SpA
Original Assignee
Bialetti Industrie SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11381776&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2000045686(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bialetti Industrie SpA filed Critical Bialetti Industrie SpA
Priority to AU28018/00A priority Critical patent/AU2801800A/en
Publication of WO2000045686A1 publication Critical patent/WO2000045686A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/005Portable or compact beverage making apparatus, e.g. for travelling, for use in automotive vehicles
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/24Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/30Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under steam pressure
    • A47J31/303Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under steam pressure classical type of espresso apparatus, e.g. to put on a stove, i.e. in which the water is heated in a lower, sealed boiling vessel, raised by the steam pressure through a rising pipe and an extraction chamber and subsequently is collected in a beverage container on top of the water boiling vessel
    • A47J31/306Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under steam pressure classical type of espresso apparatus, e.g. to put on a stove, i.e. in which the water is heated in a lower, sealed boiling vessel, raised by the steam pressure through a rising pipe and an extraction chamber and subsequently is collected in a beverage container on top of the water boiling vessel with integral electrical heating means

Definitions

  • This invention relates to an electrical coffee- maker .
  • normal coffee-makers comprise a lower boiler, an upper pot and a brewing section between the boiler and the pot, and require an external source of heat for operation.
  • This source of heat is normally the flame or the electrical plate of a stove.
  • an electrical coffee-maker which is essentially the same as a normal coffee-maker, was proposed, which electrical coffee-maker comprises an armoured spiral electrical heating element arranged inside the boiler, and connected to a socket arranged outside the boiler to connect the element to the electrical power supply.
  • the element When the boiler is filled with water, the element is submersed in the water and, once it is electrically powered, the element heats the water for brewing coffee.
  • This type of electrical coffee-maker presente several problems. This is because, over time, said element, being in contact with the water, oxidises and/or scales, thus decreasing its heating power. Furthermore, the element armouring can deteriorate to the point of losing electrical insulation, due to corrosion by contact with the water and to wear, with the consequent risk of short-circuit or, in the worst case, risk of electrocution of the user. In addition to this, being an element accessible whenever the boiler is open, the element can be accidentally touched by the user, who can be burnt if the element is still being powered by mistake or if it is very hot .
  • the purpose of this invention is to propose an electrical coffee-maker which solves the aforesaid problems, while preserving the structure, operation and appearance of a normal coffee-maker.
  • an electrical coffee-maker comprising a lower boiler, an upper pot and a brewing section between the boiler and the pot, characterised in that it comprises a box base applied onto the lower part of the boiler, electrical heating devices arranged in contact with the outer surface of the bottom of the boiler and housed inside the base so that they are concealed from the outside, and devices for electrically connecting the element to an external power source also being housed in the base.
  • Figure 1 is a raised view, partial section, of an electrical coffee-maker according to this invention.
  • FIG 2 is a perspective view from below, partially exploded, of the coffee-maker in figure 1.
  • the illustrated electrical coffee-maker generically referred to as 10 has a generically polyhedral shape.
  • Said electrical coffee-maker 10 comprises, as a normal coffee-maker, a lower boiler 11, an upper pot 12 and a brewing section 13 between the boiler 11 and pot 12.
  • the brewing section 13 consists of an internal cup with perforated bottom in which the ground coffee is placed, and a perforated plate on the bottom of the pot.
  • a box base 14 also with a polyhedral shape to recall the geometrical pattern of the boiler 11 and the pot 12, is applied underneath the boiler 11.
  • the base 14 consists of a tubular polyhedral part 15, resulting from the set of side walls of the base 14, and of a polyhedral bottom wall 16 fastened with a screw to the tubular part 15.
  • the boiler 11 and the base 14 are tapered upwards. Thanks to the taper, the tubular part 15 is fitted on the boiler 11 being fitted from the top of the boiler so that it locks in the illustrated position by interference of the side walls of the tubular part with the side walls of the boiler 11.
  • a PTC type element 18 is arranged in contact with the outer surface of the bottom 17 of boiler 11.
  • Said element consists of a hollow metallic parallelepiped body containing the specific heating element embedded in resin.
  • the bottom wall 16 is provided with two parallel walls 19 that are perpendicular to the bottom and which, when the bottom wall 16 is fastened to the tubular part 15, fasten element 18 against the outer surface of the bottom 17 of boiler 11 with their upper edges.
  • Two electrical wires 20 lead from the element 18 for connecting the element to an electrical switch 21 with light fitted on one of the side walls of the tubular part 15 of the base 14 which can be operated from the outside; such electrical switch lights up when it is switched on.
  • Two electrical wires 22 lead from the switch 21, connecting the switch to a connecting element 23 fitted on another of the side walls of the tubular part 15 of the base 14. This connecting element 23 is provided to be connected to an external power wire, not illustrated.
  • the switch 21, the connecting element 23 and the wires 20 and 22 are thus arranged inside the base 14, with the obvious exception of the parts of the switch and of the connecting element which need to be arranged on the outside for operative purposes.
  • a simple warning light may be provided instead of the switch 21 with light by accordingly modifying the various electrical connections.
  • the boiler 11 is filled with water to a certain level and the brewing section 13 is filled with ground coffee.
  • the connecting element 23 is connected to an external electrical power supply and the element 18, which heats the bottom of the boiler 11, is switched on by means of switch 21 (where fitted) .
  • switch 21 where fitted
  • the existing steam pressure pushes the water upwards into the brewing section 13 through a conduit that extends downwards from the cup.
  • the ground coffee is brewed in the brewing section and the resulting brew, owing to the continual pressure existing in boiler 11, rises along an additional conduit into pot 12 and, via specific openings at the end of this additional conduit, the brew pours into the pot.
  • This coffee-maker 10 has the great advantage that the heating element, that is element 18, is not in contact with the water and, consequently, the problems of the known type of electrical coffee-maker described in the preamble, related to the fact that the element is submersed in the water, are overcome. Furthermore, since the element 18 is closed inside the base 14, the user cannot touch it, not even accidentally, thus preventing the risk of burns. All this is obtained without modifying the traditional shape of the coffee-maker, since, as can be understood from the figures, the base 14 is essentially an extension, from both the points of view of structure and appearance, of the boiler 11.
  • PTC type element is particularly advantageous, since it is not subject to overheating; this is because the resistance value at working temperature is high enough to prevent the passage of current inside.
  • the boiler 11 Since, as known, the boiler 11 must be removed and rinsed after use, provisions are required to prevent the electrical parts from coming into contact with water. For this reason, the connection between the tubular part 15 of the base 14 and the side wall of the boiler 11 and the connection between the bottom wall 16 and the tubular part 15 of the base 14 are watertight; such tightness can be attained by means of labyrinths between the parts or by means of seals arranged in specific housings in the base 14. Furthermore, the connecting element 23 and the switch 21 with light (or warning light) must be applied to the base 14 so to prevent the letting of water inside the base; the button of switch 21 is protected by means of a boot . Naturally, different embodiments and/or additions to the description and illustrations hereof can be made.
  • the configuration of the coffee-maker and of its base can obviously vary according to requirements.
  • any electrical heating element e.g. a Peltier action device
  • any electrical heating element e.g. a Peltier action device
  • the embodiment may provide a switch and a separate warning light, although this solution is not as simple.
  • This description relates to electrical coffee-makers and, in all cases, is intended to protect the electrical device for the preparation of hot beverages by brewing, such as barley coffee, herbal tea and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Organic Insulating Materials (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

An electrical coffer-maker (10), comprising a lower boiler (11), an upper pot (12) and a brewing section (13) between the boiler (11) and the pot (12), is provided with a box base (14), applied to the lower part of the boiler (11), in which an electrical heating element (18) is concealed from the outside and arranged in contact with the outer surface of the bottom (17) of the boiler (11) and in which elements (20-23) for electrically connecting the element (18) to an external power supply are also arranged inside the box (14). This electrical coffee-maker is safe, reliable, efficient and can have a configuration that is similar to that of common coffee-makers.

Description

DESCRIPTION "ELECTRICAL COFFEE-MAKER" This invention relates to an electrical coffee- maker . As known, normal coffee-makers comprise a lower boiler, an upper pot and a brewing section between the boiler and the pot, and require an external source of heat for operation. This source of heat is normally the flame or the electrical plate of a stove. There are locations where only an electrical power supply, and no other sources of heat, is available. This is the case of offices, shops, hotel rooms, motor vehicle passenger compartments, etc. In these cases, electrical coffee-makers are required. Without altering the structure, operation and appearance of a normal coffee-maker, an electrical coffee-maker, which is essentially the same as a normal coffee-maker, was proposed, which electrical coffee-maker comprises an armoured spiral electrical heating element arranged inside the boiler, and connected to a socket arranged outside the boiler to connect the element to the electrical power supply.
When the boiler is filled with water, the element is submersed in the water and, once it is electrically powered, the element heats the water for brewing coffee. This type of electrical coffee-maker presente several problems. This is because, over time, said element, being in contact with the water, oxidises and/or scales, thus decreasing its heating power. Furthermore, the element armouring can deteriorate to the point of losing electrical insulation, due to corrosion by contact with the water and to wear, with the consequent risk of short-circuit or, in the worst case, risk of electrocution of the user. In addition to this, being an element accessible whenever the boiler is open, the element can be accidentally touched by the user, who can be burnt if the element is still being powered by mistake or if it is very hot .
The purpose of this invention is to propose an electrical coffee-maker which solves the aforesaid problems, while preserving the structure, operation and appearance of a normal coffee-maker.
This purpose is achieved by means of an electrical coffee-maker, comprising a lower boiler, an upper pot and a brewing section between the boiler and the pot, characterised in that it comprises a box base applied onto the lower part of the boiler, electrical heating devices arranged in contact with the outer surface of the bottom of the boiler and housed inside the base so that they are concealed from the outside, and devices for electrically connecting the element to an external power source also being housed in the base.
This invention will be illustrated with reference to a preferred embodiment as non-limiting example in the enclosed drawings, whereas:
Figure 1 is a raised view, partial section, of an electrical coffee-maker according to this invention;
Figure 2 is a perspective view from below, partially exploded, of the coffee-maker in figure 1. The illustrated electrical coffee-maker generically referred to as 10 has a generically polyhedral shape.
Said electrical coffee-maker 10 comprises, as a normal coffee-maker, a lower boiler 11, an upper pot 12 and a brewing section 13 between the boiler 11 and pot 12. The brewing section 13 consists of an internal cup with perforated bottom in which the ground coffee is placed, and a perforated plate on the bottom of the pot.
A box base 14 , also with a polyhedral shape to recall the geometrical pattern of the boiler 11 and the pot 12, is applied underneath the boiler 11. The base 14 consists of a tubular polyhedral part 15, resulting from the set of side walls of the base 14, and of a polyhedral bottom wall 16 fastened with a screw to the tubular part 15. The boiler 11 and the base 14 are tapered upwards. Thanks to the taper, the tubular part 15 is fitted on the boiler 11 being fitted from the top of the boiler so that it locks in the illustrated position by interference of the side walls of the tubular part with the side walls of the boiler 11. A PTC type element 18 is arranged in contact with the outer surface of the bottom 17 of boiler 11. Said element consists of a hollow metallic parallelepiped body containing the specific heating element embedded in resin. In order to keep the element 18 in contact with the outer surface of the bottom 17 of the boiler 11, the bottom wall 16 is provided with two parallel walls 19 that are perpendicular to the bottom and which, when the bottom wall 16 is fastened to the tubular part 15, fasten element 18 against the outer surface of the bottom 17 of boiler 11 with their upper edges.
Two electrical wires 20 lead from the element 18 for connecting the element to an electrical switch 21 with light fitted on one of the side walls of the tubular part 15 of the base 14 which can be operated from the outside; such electrical switch lights up when it is switched on. Two electrical wires 22 lead from the switch 21, connecting the switch to a connecting element 23 fitted on another of the side walls of the tubular part 15 of the base 14. This connecting element 23 is provided to be connected to an external power wire, not illustrated. The switch 21, the connecting element 23 and the wires 20 and 22 are thus arranged inside the base 14, with the obvious exception of the parts of the switch and of the connecting element which need to be arranged on the outside for operative purposes.
A simple warning light may be provided instead of the switch 21 with light by accordingly modifying the various electrical connections.
The operation of the electrical coffee-maker 10 is described below.
The boiler 11 is filled with water to a certain level and the brewing section 13 is filled with ground coffee.
At this point, the connecting element 23 is connected to an external electrical power supply and the element 18, which heats the bottom of the boiler 11, is switched on by means of switch 21 (where fitted) . As well known, at a certain temperature, the existing steam pressure pushes the water upwards into the brewing section 13 through a conduit that extends downwards from the cup. The ground coffee is brewed in the brewing section and the resulting brew, owing to the continual pressure existing in boiler 11, rises along an additional conduit into pot 12 and, via specific openings at the end of this additional conduit, the brew pours into the pot. This coffee-maker 10 has the great advantage that the heating element, that is element 18, is not in contact with the water and, consequently, the problems of the known type of electrical coffee-maker described in the preamble, related to the fact that the element is submersed in the water, are overcome. Furthermore, since the element 18 is closed inside the base 14, the user cannot touch it, not even accidentally, thus preventing the risk of burns. All this is obtained without modifying the traditional shape of the coffee-maker, since, as can be understood from the figures, the base 14 is essentially an extension, from both the points of view of structure and appearance, of the boiler 11.
The solution described herein is very simple and, consequently, cost-effective to make.
The use of a PTC type element is particularly advantageous, since it is not subject to overheating; this is because the resistance value at working temperature is high enough to prevent the passage of current inside.
Since, as known, the boiler 11 must be removed and rinsed after use, provisions are required to prevent the electrical parts from coming into contact with water. For this reason, the connection between the tubular part 15 of the base 14 and the side wall of the boiler 11 and the connection between the bottom wall 16 and the tubular part 15 of the base 14 are watertight; such tightness can be attained by means of labyrinths between the parts or by means of seals arranged in specific housings in the base 14. Furthermore, the connecting element 23 and the switch 21 with light (or warning light) must be applied to the base 14 so to prevent the letting of water inside the base; the button of switch 21 is protected by means of a boot . Naturally, different embodiments and/or additions to the description and illustrations hereof can be made.
The configuration of the coffee-maker and of its base can obviously vary according to requirements.
Other types of electrical elements can be used, although the proposal above employing a PTC type elements, as illustrated, is particularly advantageous. The element can be locked onto the external surface of the bottom of the boiler with any type of fastening element thereof formed in the housing or housed within it; alternatively, the element may be applied to said surface by means of thermal-resistant glue.
In general, any electrical heating element (e.g. a Peltier action device) can be employed.
Instead of a switch with light, the embodiment may provide a switch and a separate warning light, although this solution is not as simple.
This description relates to electrical coffee-makers and, in all cases, is intended to protect the electrical device for the preparation of hot beverages by brewing, such as barley coffee, herbal tea and the like.

Claims

1. An electrical coffee-maker (10), comprising a lower boiler (11) , an upper pot (12) and a brewing section (13) between the boiler (11) and the pot (12) , characterised in that it comprises a box base (14) , applied to the lower part of the boiler (11) , devices (18) for electrical heating arranged in contact with the outer surface of the bottom (17) of the boiler (11) and arranged in the base (14) so that they are concealed from the outside, and devices (20-23) for electrically connecting the electrical heating devices (18) to an external power supply also housed in the base (14) .
2. An electrical coffee-maker according to claim
1, in which said electrical heating devices consist of an electrical heating element (18) .
3. An electrical coffee-maker according to claim
2, in which the electrical heating element (18) is a PTC type element .
4. An electrical coffee-maker according to any of the claims above, in which the base (14) comprises elements (19) for fastening the electrical heating devices (18) against the outer surface of the bottom (17) of the boiler (11) .
5. An electrical coffee-maker according to claim 4, in which the base (14) comprises a removable bottom wall (16) and the fastening devices consist of walls (19) that rise from said bottom wall (16) of the base (14) .
6. An electrical coffee-maker according to any of the claims above, in which said electrical connection devices (20-23) are arranged in the base (14) and are watertight.
7. An electrical coffee-maker according to any of the claims above, in which the electrical connection devices comprise a connecting element (23) for connecting the electrical heating devices (18) to the external power supply and an electrical switch (21) with light to enable and disable said connection and which lights up when the connection is on.
8. An electrical coffee-maker according to claim 7, in which a warning light is provided as an alternative to the electrical switch with light (21) .
9. An electrical coffee-maker according to any of the claims above, in which the configuration of the base (14) corresponds to the configuration of the boiler (11) .
10. An electrical coffee-maker according to claim 9, in which the base (14) comprises a removable bottom wall (16) and in which both the boiler (11) and the base (14) are tapered, the base (14) being pressure fitted onto the boiler (11) without the bottom wall (16) on the boiler (11) and the bottom wall (16) being finally fastened onto the base (14) .
11. An electrical coffee-maker according to any of the claims above, the shape of which is generically polyhedral .
PCT/EP2000/000892 1999-02-05 2000-02-04 Electrical coffee-maker Ceased WO2000045686A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28018/00A AU2801800A (en) 1999-02-05 2000-02-04 Electrical coffee-maker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI000230 IT1307762B1 (en) 1999-02-05 1999-02-05 ELECTRIC COFFEE POT.
ITMI99A000230 1999-02-05

Publications (1)

Publication Number Publication Date
WO2000045686A1 true WO2000045686A1 (en) 2000-08-10

Family

ID=11381776

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/000892 Ceased WO2000045686A1 (en) 1999-02-05 2000-02-04 Electrical coffee-maker

Country Status (3)

Country Link
AU (1) AU2801800A (en)
IT (1) IT1307762B1 (en)
WO (1) WO2000045686A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1232709A2 (en) 2001-02-14 2002-08-21 Strix Limited Electric beverage maker
GB2383256A (en) * 2001-11-12 2003-06-25 Oliver Klein Electric coffee maker
EP1949827A1 (en) * 2007-01-24 2008-07-30 Wmf Württembergische Metallwarenfabrik Ag Machine for preparing a hot drink
ITNA20120061A1 (en) * 2012-11-09 2014-05-10 Antonio Garofalo SPECIAL SUPPORT TO SCREW AND DISCONNECT THE COFFEE MACHINE BECOME A MOKA WITH ONE HAND.
EP3195765A4 (en) * 2014-09-21 2018-05-30 Zhixiong He On-board coffee processor
EP4091506A1 (en) * 2021-05-17 2022-11-23 Jiangmen City Xinhui Henglong Innovative Housewares Co., Ltd. Mocha pot

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH384737A (en) * 1961-04-26 1965-02-26 Albertini Cesare Coffee maker with electric heating
US3757670A (en) * 1972-02-10 1973-09-11 Sunbeam Corp Expresso coffeemaker
EP0117880A1 (en) * 1983-03-02 1984-09-12 Elpag Ag Chur Electric heating device
DE9419295U1 (en) * 1994-11-19 1995-02-02 Bremer, Joachim, 81377 München Portable coffee machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH384737A (en) * 1961-04-26 1965-02-26 Albertini Cesare Coffee maker with electric heating
US3757670A (en) * 1972-02-10 1973-09-11 Sunbeam Corp Expresso coffeemaker
EP0117880A1 (en) * 1983-03-02 1984-09-12 Elpag Ag Chur Electric heating device
DE9419295U1 (en) * 1994-11-19 1995-02-02 Bremer, Joachim, 81377 München Portable coffee machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1232709A2 (en) 2001-02-14 2002-08-21 Strix Limited Electric beverage maker
EP1232709A3 (en) * 2001-02-14 2004-03-17 Strix Limited Electric beverage maker
US7032506B2 (en) 2001-02-14 2006-04-25 Strix Limited Electric beverage maker
CN1306894C (en) * 2001-02-14 2007-03-28 施特里克斯有限公司 Electric beverage making device
GB2383256A (en) * 2001-11-12 2003-06-25 Oliver Klein Electric coffee maker
EP1949827A1 (en) * 2007-01-24 2008-07-30 Wmf Württembergische Metallwarenfabrik Ag Machine for preparing a hot drink
ITNA20120061A1 (en) * 2012-11-09 2014-05-10 Antonio Garofalo SPECIAL SUPPORT TO SCREW AND DISCONNECT THE COFFEE MACHINE BECOME A MOKA WITH ONE HAND.
EP3195765A4 (en) * 2014-09-21 2018-05-30 Zhixiong He On-board coffee processor
EP4091506A1 (en) * 2021-05-17 2022-11-23 Jiangmen City Xinhui Henglong Innovative Housewares Co., Ltd. Mocha pot

Also Published As

Publication number Publication date
ITMI990230A1 (en) 2000-08-05
IT1307762B1 (en) 2001-11-19
AU2801800A (en) 2000-08-25

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