EP0000685A1 - Automatic infusion machine for preparing coffee and similar beverages - Google Patents

Automatic infusion machine for preparing coffee and similar beverages Download PDF

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Publication number
EP0000685A1
EP0000685A1 EP78430005A EP78430005A EP0000685A1 EP 0000685 A1 EP0000685 A1 EP 0000685A1 EP 78430005 A EP78430005 A EP 78430005A EP 78430005 A EP78430005 A EP 78430005A EP 0000685 A1 EP0000685 A1 EP 0000685A1
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EP
European Patent Office
Prior art keywords
piston
drawer
infusion
coffee
water
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Granted
Application number
EP78430005A
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German (de)
French (fr)
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EP0000685B1 (en
Inventor
Mario Levi
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Individual
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Individual
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    • 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
    • A47J31/34Coffee-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 liquid pressure
    • A47J31/36Coffee-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 liquid pressure with mechanical pressure-producing means
    • A47J31/3604Coffee-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 liquid pressure with mechanical pressure-producing means with a mechanism arranged to move the brewing chamber between loading, infusing and ejecting stations
    • A47J31/3609Loose coffee being employed
    • A47J31/3619Means to remove coffee after brewing
    • 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
    • A47J31/34Coffee-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 liquid pressure
    • A47J31/36Coffee-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 liquid pressure with mechanical pressure-producing means
    • A47J31/3604Coffee-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 liquid pressure with mechanical pressure-producing means with a mechanism arranged to move the brewing chamber between loading, infusing and ejecting stations
    • A47J31/3609Loose coffee being employed
    • A47J31/3614Means to perform transfer from a loading position to an infusing position

Definitions

  • the present invention relates to an operating assembly intended for the instant preparation of coffee infusion doses in fully automatic cycles and particularly of express coffee.
  • the packing pressure is very high, too low: the hot water which is sent to the filter for the infusion of coffee progresses in swirls in the cake, creates favored paths (chimneys) and only soaks a part of the ground coffee cannot completely extract the aromatic elements from the coffee; too strong: the water, meeting a very compact mass, hardly drips through, punctures the cake creating a chimney, infuses only part of the amount of coffee and gives poor coffee; and, in extreme cases, the water not being able to pass through the wafer, the machine stops.
  • the present invention overcomes these problems by means of an automatic compact assembly which comprises a body in which a part moves which can occupy a rest position and a working position.
  • the displacement of this part can be rectilinear alternating or of any other kind in the body of the group.
  • this movable part animated by an alternating rectilinear movement will be called “drawer” this drawer is crossed by a passage which allows the coffee grounds to fall onto a tamping piston in the low position and it also carries, machined on its underside, a frustoconical recess, large base downwards, in which the grinding disc is formed.
  • the infusion is made from bottom to top which allows a better extraction of the coffee aromas, but could also be done conventionally from top to bottom in another embodiment not shown.
  • the marc is ejected by removing the spent coffee grounds from the mold by washing the brewing chamber against the current; but could also be done, in an embodiment not shown so as to evacuate dry, spent coffee grounds pancakes.
  • the drawer playing the role of distributor infusion inlet, brewed coffee outlet, water release evaluation of spent marc; the sealing ranges which are there applied also serve as guidance in translation.
  • Water dosing and coffee grinding devices are also part of the accessories required for fully automatic operation of the group.
  • the jack controlled by two solenoid valves and the drawer itself serving as a hydraulic distributor makes it possible to simplify the hydraulic circuit and the electrical diagram; moreover, this design eliminates the use of solenoid valves on the hot water circuit, a source of scaling and breakdowns typical of this kind of machine.
  • the main advantage of the present invention consists in a rational realization of the various organs, without complex mechanism, which reduces the risk of incidents, moreover no trace of spent coffee grounds remains in the brewing chamber, nor on the filter, nor on the tamping piston, excluding any changes in taste and unpleasant odors.
  • Fig.2 is a figure similar to fig.l but in the working position.
  • the group consists of the body 1 in which is arranged a cylinder which receives the hollow piston 3; inside this piston 3 and coaxially to it, a cylinder is machined where the piston 4 slides.
  • the funnel 5 Parallel to the axis of the piston 4 and to the left in figs. 1 and 2; is located the funnel 5 which receives the spent marc of cage to direct it towards the evacuation, the emptying.
  • the cover 6 closes the top of the body and provides a housing in which the drawer 7 slides; the drawer 7 carries a bore 8 which in the rest position fig.1 is coaxial with the piston 4.
  • a recess 9 of frustoconical shape, large base down a filter 10 is fixed to a certain distance from the bottom of this recess 9 so as to form a chamber 11; in the working position this recess is coaxial with the piston 4.
  • the drawer 7 receives its translational movement by the ve. known type double-acting hydraulic rinse 12 connected to the drawer 7 by the rod 13 and the axis 14.
  • the piston 4 is fixed on the rod 15 which carries the piston 16 at its lower end.
  • the piston 16 slides in the cylinder 17 arranged in the lower part of the shutter 18 closing the cylinder 2, the shutter 18 is fixed to the body 1 by the screws 19 fig. 6, it also maintains the spacer 20 in position.
  • the valve 21 is housed in the chamber 20a of the spacer 20; inside this valve 21 slides the rod 15 of the piston 4; by means of the spring 22, the valve 21 presses in a sealed manner on the flat seal 23.
  • Fig.3 is a view del.bowel the cover 6 removed, drawer 7 in the rest position, with cut-outs amounting the provision of the various distributors provided for the passage of hot water from a brew, outlet of the brewed coffee and d water from the spent coffee grounds.
  • Fig. 4 is identical to fig. 3, but the drawer is in the working position.
  • Fig. 5 is a schematic figure indicating the different locations of the A.B.C.D. the pressure relief valve E and the non-return valve 27.
  • Fig. 6 is a broken diametrical section of FIG. 1 showing the arrangement of the non-return valve 27 and of the decompression valve E and the fixing of the shutter 18.
  • the water of the boiler f being at the ideal temperature: by an electrical contact of known type, a dose of ground coffee delivered by a system known per se is dropped inside the hollow piston 3 through the passages 26 cover 6 and 8 of drawer 7; the same electrical contact has energized the solenoid valve which delivers a quantity of water electronically dosed to a metering glass by a known system. This quantity obtained the solenoid valve d is cut, the pump a is energized as well as the 3-way solenoid valve c.
  • the pressurized water delivered by the pump, drawn from the verrecbseur e reaches the jack 12 at 12 a and through the non-return valve g to the temperature exchanger f.
  • the jack 12 At the end of travel stop, the jack 12 has pushed the slide 7 into the working position; the differential section duct hh then connects distributor A of the exchanger f with the distributor C fig.4.
  • the pressurized water from the distributor C descends into the conduit i fig 5 which brings it into the annular groove i 'fig.5 and 6 of the non-return valve 27, through the conduit i "to the annular groove j fig.6 and by the conduits j 'fig.6 from the spacer 20 to the housing 20a of the valve 21 held in a sealed manner on the seal 23 by the spring 22.
  • the bottom of the hollow piston. 3 communicates through the holes 29 with the inside of the cylinder of the hollow piston 3.
  • the hollow piston 3 comes to bear in a sealed manner by the seal 24 around the recess 9 fig.2, come to be placed in the working position coaxially with the hollow piston 3; and, by the communications 29 pushes the piston 4; the latter going up causes the rod 15 the piston 16 which is integral with it, in its movement the piston 16 drives out the water contained in the cylinder 17 by the conduits M in the circular groove N and the sleeve 30 towards the solenoid valve c busy; switched off in the direction of the arrow cc and the pump a.
  • the pump continues to operate, the water under pressure arrives at the cylinder 12 at 12 b and pushes it to the left, to bring the drawer 7 to the rest position fig.4; the water contained in the jack is sucked up by the pump through the solenoid valve C passing without voltage in the direction of the arrow cc fig.7; the pump also delivers through the nipple 30 fig.6 in the annular barge N and the conduits M in the cylinder 17 fig.6; but the presence of the non-return valve 27 fig.6 opposing the passage of the water contained in the chamber 35 fig.4 formed in the hollow piston 3 under the piston 4; the piston 4 is therefore held in the high position fig.2, the piston 16 sliding in the cylinder 17 and secured by the rod 15 of the piston 16 can not descend.
  • the tap E gives the option of evacuating via the pipe S, when it is acted upon, in the event of a grinding dosage error the water contained in the chamber 33 fig. 2 authorizing the return of the drawer 7 to the rest position and starting a new cycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

1. Automatic device for the infusion of expresso coffee or other similar beverages in which a drawer (7) places above a cylinder (3) can hold two positions, the drawer (7) having an opening (8) for the measure of grinding coffee which goes through the depth of the drawer (7) and can be placed in a position co-axial with the cylinder (3), a piston (4) sliding into the latter when raised, it is characterised by : - A reception chamber for the measure of grinding coffee is delimited by the interior lateral surface of the cylinder (3) and the upper surface of the piston (4) in lower position, the drawer being in rest position in which the opening (8) is co-axial with the cylinder (3), thus allowing the introduction of the measure of grinding coffee into the aforementioned reception chamber, - An infusion chamber is delimited by a blind hole (9) placed on the lower surface of the drawer (7) and the frontal upper side of the piston (4) in upper position, the drawer (7) being in work position, position in which the blind hole (9) caps the cylinder (3 and is coaxial with this latter, the frontal surface of the piston (4) touching the lower surface of the drawer (7) the water being injected into the infusion chamber, the piston (4) staying in this upper position during the infusion off and ejecting the cake of used grounds, the piston (4) returning to its lower position so that a new cycle can begin.

Description

La présente invention se rapporte à un ensemble opératoire destiné à la préparation instantanée de doses d'infusion de café en cycles entièrement automatiques et particulièrement de café express.The present invention relates to an operating assembly intended for the instant preparation of coffee infusion doses in fully automatic cycles and particularly of express coffee.

Il existe déjà des machines à café complètement automatiques, à jetons, monnaie ou de comptoir,mais elles posent des problèmes de maintenance vu leur complexité.There are already fully automatic coffee machines, tokens, coins or counter, but they pose maintenance problems due to their complexity.

Elles nécessitent, soit des motoréducteurs planétaires ou à vis sans fin pour le positionnement, soit des centrales hydrauliques à huile dont la moindre fuite dégage une odeur désagréable dans l'établissement.They require either planetary or worm geared motors for positioning, or hydraulic oil power stations, the slightest leak of which gives off an unpleasant odor in the establishment.

Il existe aussi un autre problème jusqu'à présent non résolu ou mal résolu, celui du tassage de la dose de mouture de café pour former une galette sur le filtre.There is also another problem which has hitherto been unsolved or poorly resolved, that of tamping down the dose of ground coffee to form a cake on the filter.

En effet, la pression de tassage est très importante, trop faible : l'eau chaude qui est envoyée au filtre pour l'infusion du café progresse en tourbillons dans la galette, se crée des parcours favirosés ( cheminées ) et n'imbibant qu'une partie de la galette de mouture ne peut extraire en totalité les éléments aromatiques du café;
trop forte : l'eau rencontrant une masse très compacte passe difficilement au goutte à goutte, perfore la galette créant une cheminée, n'infuse qu'une partie de la dose de mouture et donne un café médiocre; et, dans les cas extrêmes, l'eau ne pouvant passer au travers de la galette, la machine s'arrête.
Indeed, the packing pressure is very high, too low: the hot water which is sent to the filter for the infusion of coffee progresses in swirls in the cake, creates favored paths (chimneys) and only soaks a part of the ground coffee cannot completely extract the aromatic elements from the coffee;
too strong: the water, meeting a very compact mass, hardly drips through, punctures the cake creating a chimney, infuses only part of the amount of coffee and gives poor coffee; and, in extreme cases, the water not being able to pass through the wafer, the machine stops.

En outre dans les différents types de machines automatiques, sont prévues plusieurs opérations différentes dans lesquelles s'effectuent successivement

  • la réception de la dose de mouture, le tassage pour former une galette, l'infusion, l'expulsion de la galette épuisée, le nettoyage du filtre... ou dans certaines conceptions, après l'infusion, la galette épuisée demeure sur le filtre jusqu'au cycle suivant qui peut avoir lieu plusieurs heures après, avec tous les inconvénients qui en découlent...
In addition, in the different types of automatic machines, several different operations are provided for, in which successive operations are carried out.
  • reception of the grinding dose, tamping to form a pancake, infusion, expulsion of the exhausted pancake, cleaning the filter ... or in some designs, after the infusion, the exhausted pancake remains on the filters until the next cycle which can take place several hours later, with all the drawbacks that result ...

Dans d'autres conceptions, il est nécessaire d'utiliser des doses de mouture pour former le support de la galette qui sera infusée, doses de mouture qui seront évacuées sans être utilisées pour faire du café.In other designs, it is necessary to use doses of ground coffee to form the support for the cake which will be infused, doses of ground coffee which will be removed without being used to make coffee.

La suite de ces différentes opérations requiert des mécanismes, des transmissions complexes, hydrauliques, électriques mécaniques, entrainant des temps morts importants ( parfois 10 secondes par cycle d'infusion ).The continuation of these various operations requires mechanisms, complex transmissions, hydraulic, mechanical electrical, resulting in significant downtime (sometimes 10 seconds per infusion cycle).

La présente invention supprime ces problèmes au moyen d'un groupe automatique d'encombrement réduit qui comprend un corps dans lequel se déplace une pièce pouvant occuper une position repos et une position travail.The present invention overcomes these problems by means of an automatic compact assembly which comprises a body in which a part moves which can occupy a rest position and a working position.

Le déplacement de cette pièce peut être rectiligne alternatif ou de tout autre genre dans le corps du groupe.The displacement of this part can be rectilinear alternating or of any other kind in the body of the group.

Dans la forme d'exécution préférentielle présentée à titre d'exemple explicatif et non limitatif, cette pièce mobile animée d'un mouvement rectiligne alternatif sera dénommée " tiroir" ce tiroir est traversé par un passage qui permet la chute de la mouture de café sur un piston tassoir en position basse et il porte aussi, usiné sur sa face inférieure, un évidement de forme tronconique, grande base vers le bas, dans lequel est formée la galette de mouture.In the preferred embodiment presented by way of explanatory and nonlimiting example, this movable part animated by an alternating rectilinear movement will be called "drawer" this drawer is crossed by a passage which allows the coffee grounds to fall onto a tamping piston in the low position and it also carries, machined on its underside, a frustoconical recess, large base downwards, in which the grinding disc is formed.

L'infusion se fait de bas en haut ce qui permet une meilleure extraction des arômes du café, mais pourrait également se faire classiquement de haut en bas dans une autre réalisation non représentée.The infusion is made from bottom to top which allows a better extraction of the coffee aromas, but could also be done conventionally from top to bottom in another embodiment not shown.

L'éjection du marc s'effectue en démoulant la galette de marc de café épuisé par lavage de la chambre d'infusion à contre-courant; mais pourrait aussi se faire, dans une réalisation non représentée de manière a évacuer des galettes de marc de café épuisé, sèches.The marc is ejected by removing the spent coffee grounds from the mold by washing the brewing chamber against the current; but could also be done, in an embodiment not shown so as to evacuate dry, spent coffee grounds pancakes.

Le tiroir jouant le rôle de distributeur : d'entrée d'infusion, de sortie du café infusé, de dégagement de l'eau d'évaluation du marc épuisé; les portées d'étancheité qui lui sont appliquées servent également de guidage en translation.The drawer playing the role of distributor: infusion inlet, brewed coffee outlet, water release evaluation of spent marc; the sealing ranges which are there applied also serve as guidance in translation.

D'autres dispositifs de types connus complètent le groupe :

  • Des organes moteurs pour déplacer la pièce où se trouve la chambre d'infusion, un vérin dans le cas du tiroir ou tout autre système d'avance dans le cas d'un autre mouvement.
Other devices of known types complete the group:
  • Motor organs for moving the part where the brewing chamber is located, a jack in the case of the drawer or any other advance system in the case of another movement.

Un dispositif à double piston, montée et descente, pour le dispositif de réception mouture, de formation et maintien de la galette pendant l'infusion.A double piston device, up and down, for the grinding receiving device, for forming and holding the pancake during the infusion.

Des dispositifs de dosage d'eau et de mouture de café font aussi partie des accessoires nécessaires à un fonctionnement entièrement automatiques du groupe.Water dosing and coffee grinding devices are also part of the accessories required for fully automatic operation of the group.

La simplicité des mouvements alternatifs par vérin ne nécessitant pas de butées de fin de course, ni de positionnement, procure une très grande rapidité de manoeuvre ( moins de 3 secondes par cycle d'infusion ).The simplicity of the reciprocating movements by jack, not requiring end stops or positioning, provides very rapid maneuvering (less than 3 seconds per infusion cycle).

D'autre part, le vérin commandé par deux électrovannes et le tiroir faisant lui même office de distributeur hydraulique permet de simplifier le circuit hydraulique et le schéma électrique; de plus cette conception supprime l'emploi d'électrovanne sur le circuit eau chaude, source d'entartrage et de pannes typiques à ce genre de machines.On the other hand, the jack controlled by two solenoid valves and the drawer itself serving as a hydraulic distributor makes it possible to simplify the hydraulic circuit and the electrical diagram; moreover, this design eliminates the use of solenoid valves on the hot water circuit, a source of scaling and breakdowns typical of this kind of machine.

Le principal avantage de la présente invention consiste dans une réalisation rationnelle des divers organes, sans mécanisme complexe, ce qui réduit les risques d'incidents, de plus aucune trace de marc de café épuisé ne subsiste dans la chambre d'infusion, ni sur le filtre, ni sur le piston tassoir,excluant toutes altérations du goût et odeurs désagréables.The main advantage of the present invention consists in a rational realization of the various organs, without complex mechanism, which reduces the risk of incidents, moreover no trace of spent coffee grounds remains in the brewing chamber, nor on the filter, nor on the tamping piston, excluding any changes in taste and unpleasant odors.

D'autres objectifs et avantages de la présente invention ressortiront plus complètement de la description détaillée suivante qui concerne une forme de réalisation préférée mais non exclusive et qui se réfère aux figures jointes dans lesquelles :

  • La fig.1 est une coupe schématique d'un groupe automatique conforme à la présente invention; en position repos,
Other objectives and advantages of the present invention will emerge more fully from the following detailed description which relates to a preferred but not exclusive embodiment and which refers to the appended figures in which:
  • Fig.1 is a schematic section of an automatic group according to the present invention; in the rest position,

La fig.2 est une figure analogue à la fig.l mais en position travail.Fig.2 is a figure similar to fig.l but in the working position.

On voit sur les fig. 1 et 2 que le groupe se compose du corps 1 dans lequel est aménagé un cylindre qui reçoit le piston creux 3; à l'intérieur de ce piston 3 et coaxialement à lui, est usiné un cylindre où coulisse le piston 4.We see in fig. 1 and 2 that the group consists of the body 1 in which is arranged a cylinder which receives the hollow piston 3; inside this piston 3 and coaxially to it, a cylinder is machined where the piston 4 slides.

Parallèle à l'axe du piston 4 et à gauche sur les fig.1 et 2; se trouve l'entonnoir 5 qui reçoit le marc de cage épuise pour le diriger vers l'évacuation, la vidange.Parallel to the axis of the piston 4 and to the left in figs. 1 and 2; is located the funnel 5 which receives the spent marc of cage to direct it towards the evacuation, the emptying.

Le couvercle 6 ferme le dessus du corps et ménage un logement dans lequel coulisse le tiroir 7; le tiroir 7 porte un alésage 8 qui en position repos fig.1 est coaxial avec le piston 4.Sur la face inférieure du tiroir 7 est usiné un évidement 9 de forme tronconique, grande base vers le bas, un filtre 10 est fixé à une certaine distance du fond de cet évidement 9 de manière à former une chambre 11; en position travail cet évidement est coaxial avec le piston 4.The cover 6 closes the top of the body and provides a housing in which the drawer 7 slides; the drawer 7 carries a bore 8 which in the rest position fig.1 is coaxial with the piston 4.On the underside of the drawer 7 is machined a recess 9 of frustoconical shape, large base down, a filter 10 is fixed to a certain distance from the bottom of this recess 9 so as to form a chamber 11; in the working position this recess is coaxial with the piston 4.

Le tiroir 7 reçoit son mouvement de translation par le vé-. rin hydraulique de type connu à double effet 12 relié au tiroir 7 par la tige 13 et l'axe 14.The drawer 7 receives its translational movement by the ve. known type double-acting hydraulic rinse 12 connected to the drawer 7 by the rod 13 and the axis 14.

Le piston 4 est fixé sur la tige 15 qui porte à son extrémité inférieure le piston 16.The piston 4 is fixed on the rod 15 which carries the piston 16 at its lower end.

Le piston 16 coulisse dans le cylindre 17 aménagé dans la partie inférieure de l'obturateur 18 obturant le cylindre 2, l'obturateur 18 est fixé au corps 1 par les vis 19 fig.6, il maintient aussi en position l'entretoise 20.The piston 16 slides in the cylinder 17 arranged in the lower part of the shutter 18 closing the cylinder 2, the shutter 18 is fixed to the body 1 by the screws 19 fig. 6, it also maintains the spacer 20 in position.

Le clapet 21 est logé dans la chambre 20a de l'entretoise 20; à l'intérieur de ce clapet 21 coulisse la tige 15 du piston 4; grâce au ressort 22, le clapet 21 appuie d'une manière étanche sur le joint plat 23.The valve 21 is housed in the chamber 20a of the spacer 20; inside this valve 21 slides the rod 15 of the piston 4; by means of the spring 22, the valve 21 presses in a sealed manner on the flat seal 23.

C'est entre le joint plat 24 situé sur le bord supérieur du piston creux 3 et le joint plat 25 fixé sous le couvercle 6 autour de l'alésage 26 coaxial avec le piston creux 3, que coulisse le tiroir 7.It is between the flat seal 24 located on the upper edge of the hollow piston 3 and the flat seal 25 fixed under the cover 6 around the bore 26 coaxial with the hollow piston 3, that slides the drawer 7.

La fig.3 est une vue del.dessus le couvercle 6 ôté, tiroir 7 en position repos, avec des écorchés montant la disposition des différents distributeurs prévus pour le passage de l'eau chaude d'unfusion, de sortie du café infusé et d'eau d'évacuation du marc de café épuisé.Fig.3 is a view del.dessus the cover 6 removed, drawer 7 in the rest position, with cut-outs amounting the provision of the various distributors provided for the passage of hot water from a brew, outlet of the brewed coffee and d water from the spent coffee grounds.

La fig. 4 est identique à la fig.3, mais le tiroir est en position travail.Fig. 4 is identical to fig. 3, but the drawer is in the working position.

  • En A - distributeur en communication directe avec une chaudière de type connu à échangeur de température.In A - distributor in direct communication with a boiler of known type with temperature exchanger.
  • en B - distributeur éjection marc et remise au point mort.in B - marc ejection distributor and return to neutral.
  • en C - distributeur d'entrée eau montée piston en infusion ( fig. 4 tiroir en position travail ).in C - water inlet distributor mounted piston in infusion (fig. 4 drawer in working position).
  • en D - distributeur sortie café infusé. Le rôle de ces différents distributeurs sera expliqué plus en détail au cours de l'exposé.in D - brewed coffee outlet distributor. The role of these diffe Distributor rents will be explained in more detail during the presentation.

La fig. 5 est une figure schématique indiquant les différents emplacements des distributeurs A.B.C.D. du robinet de décompression E et du clapet non retour 27.Fig. 5 is a schematic figure indicating the different locations of the A.B.C.D. the pressure relief valve E and the non-return valve 27.

La fig. 6 est une coupe diamétrale brisée de la fig.1 montrant la disposition du clapet non retour 27 et du robinet de décompression E et la fixation de l'obturateur 18.Fig. 6 is a broken diametrical section of FIG. 1 showing the arrangement of the non-return valve 27 and of the decompression valve E and the fixing of the shutter 18.

La fig. 7 montre schématiquement le circuit hydraulique sur lequel on distingue :

  • a - pompe de type connu .
  • b et c - électrovanne à 3 voies de type connu .
  • d - électrovanne à 2 voies de type connu.
  • e - un doseur d'eau électronique de type connu.
  • f - une chaudière à échangeur de température de type connu, sur laquelle est directement fixé le corps 1.
  • g - un clapet non retour de type connu.
Fig. 7 schematically shows the hydraulic circuit on which there are:
  • a - pump of known type.
  • b and c - 3-way solenoid valve of known type.
  • d - 2-way solenoid valve of known type.
  • e - an electronic water dispenser of known type.
  • f - a boiler with known type temperature exchanger, on which the body 1 is directly fixed.
  • g - a non-return valve of known type.

L'eau de la chaudière f étant à la température idéale: par un contact électrique de type connu, on fait tomber une dose de café moulu délivrée par un système connu en soi, à l'intérieur du piston creux 3 au travers des passages 26 du couvercle 6 et 8 du tiroir 7; le même contact électrique a excité l'électrovanne qui délivre au verre doseur e une quantité d'eau électroniquement dosée par un système connu. Cette quantité obtenue l'électrovanne d est coupée, la pompe a est mise sous tension de même que l'électrovanne à 3 voies c.The water of the boiler f being at the ideal temperature: by an electrical contact of known type, a dose of ground coffee delivered by a system known per se is dropped inside the hollow piston 3 through the passages 26 cover 6 and 8 of drawer 7; the same electrical contact has energized the solenoid valve which delivers a quantity of water electronically dosed to a metering glass by a known system. This quantity obtained the solenoid valve d is cut, the pump a is energized as well as the 3-way solenoid valve c.

L'eau sous pression débitée par la pompe, puisée dans le verrecbseur e parvient au vérin 12 en 12 a et au travers du clapet non retour g à l'échangeur de température f.The pressurized water delivered by the pump, drawn from the verrecbseur e reaches the jack 12 at 12 a and through the non-return valve g to the temperature exchanger f.

En position repos du tiroir 7 fig. 3 l'eau provenant de l'échangeur ne pouvant s'écouler, le distributeur A étant obturé par le tiroir 7, l'eau arrivant au vérin 12 en 12 a, pousse le tiroir 7 vers la droite en position travail.In the rest position of the drawer 7 fig. 3 the water coming from the exchanger cannot flow, the distributor A being closed by the drawer 7, the water arriving at the jack 12 at 12 a, pushes the drawer 7 to the right in the working position.

L'eau contenue dans le vérin , sur la face opposée de son piston sort en 12 b, passe au travers de l'électrovanne b qui, hors tension est passante dans le sens de la fléche bb et est aspirée par la pompe a.The water contained in the jack, on the opposite face of its piston exits at 12 b, passes through the solenoid valve b which, with the power off, is on in the direction of the arrow bb and is sucked in by the pump a.

En butée à fond de course, le vérin 12 a poussé le tiroir 7 en position travail; le conduit de section différentielle hh met alors en communication le distributeur A de l'échangeur f avec le distributeur C fig.4 .At the end of travel stop, the jack 12 has pushed the slide 7 into the working position; the differential section duct hh then connects distributor A of the exchanger f with the distributor C fig.4.

L'eau sous pression du distributeur C, descend dans le conduit i fig 5 qui l'amène dans la gorge annulaire i' fig.5 et 6 du clapet non retour 27, par le conduit i" à la gorge annulaire j fig.6 et par les conduits j' fig.6 de l'entretoise 20 au logement 20 a du clapet 21 maintenu d'une manière étanche sur le joint 23 par le ressort 22.The pressurized water from the distributor C descends into the conduit i fig 5 which brings it into the annular groove i 'fig.5 and 6 of the non-return valve 27, through the conduit i "to the annular groove j fig.6 and by the conduits j 'fig.6 from the spacer 20 to the housing 20a of the valve 21 held in a sealed manner on the seal 23 by the spring 22.

L'eau sous pression n'ayant aucune issue de ce côté là, repousse vers le haut la bille 28 du clapet non retour 27 passant dans ce sens et pénètre par le conduit K dans l'espace annulaire L formé par le chanfrein du bord extérieur inférieur du piston creux 3 . Le fond du piston creux.3 communique par les trous 29 avec l'intérieur du cylindre du piston creux 3.The pressurized water having no outlet on this side there, pushes up the ball 28 of the non-return valve 27 passing in this direction and enters through the conduit K into the annular space L formed by the chamfer of the outer edge bottom of the hollow piston 3. The bottom of the hollow piston. 3 communicates through the holes 29 with the inside of the cylinder of the hollow piston 3.

Sous l'action de la pression d'eau, le piston creux 3 vient porter d'une manière étanche par le joint 24 autour de l'évidement 9 fig.2, venu se placer en position travail coaxialement au piston creux 3; et, par les communications 29 repousse le piston 4; celui-ci en montant entraîne par la tige 15 le piston 16 qui lui est solidaire, dans son mouvement le piston 16 chasse l'eau contenue dans le cylindre 17 par les conduits M dans la gorge circulaire N et le manchon 30 vers l'électrovanne c passante; hors tension dans le sens de la flêche cc et la pompe a.Under the action of the water pressure, the hollow piston 3 comes to bear in a sealed manner by the seal 24 around the recess 9 fig.2, come to be placed in the working position coaxially with the hollow piston 3; and, by the communications 29 pushes the piston 4; the latter going up causes the rod 15 the piston 16 which is integral with it, in its movement the piston 16 drives out the water contained in the cylinder 17 by the conduits M in the circular groove N and the sleeve 30 towards the solenoid valve c busy; switched off in the direction of the arrow cc and the pump a.

Dans son mouvement ascensionnel et à fin de course, lorsque le piston 4 affleure la base inférieure du tiroir 7 après avoir tassé la dose de mouture dans l'évidement 9; la tige 15 par son épaulement 31 entraine le clapet 21 donnant ainsi passage à l'eau chaude sous pression, en provenance sous la poussée de la pompe a de l'échangeur, par les conduits o'o" jusqu'à la cavité 32 et au travers de la grille de diffusion 33 qui la recouvre permettant l'infusion du café. Le café s'écoulera dans la tasse par le conduit P; débouchant dans la chambre 11, au dessus du filtre 10 de l'évidement 9, venu en concordance, tiroir en position travail fig.4, avec le distributeur D et son conduit 34.In its upward movement and at the end of its travel, when the piston 4 is flush with the lower base of the drawer 7 after having compacted the amount of ground coffee in the recess 9; the rod 15 by its shoulder 31 drives the valve 21 thus giving passage to hot water under pressure, coming under the thrust of the pump a from the exchanger, by the conduits o'o "up to the cavity 32 and through the diffusion grid 33 which covers it allowing the coffee to be infused. The coffee will flow into the cup through the conduit P; opening into the chamber 11, above the filter 10 of the recess 9, coming in concordance, drawer in working position fig.4, with the distributor D and its duct 34.

Lorsque la quantité d'eau sélectionnée contenue dans le verre doseur e, est complètement aspirée par la pompe, un circuit électrique connu interrompt l'arrivée du courant à l'électrovanne c et met sous tension l'électrovanne b.When the quantity of selected water contained in the measuring cup e, is completely sucked by the pump, a known electrical circuit interrupts the arrival of the current to the solenoid valve c and energizes the solenoid valve b.

La pompe continuant à fonctionner, l'eau sous pression arrive au vérin 12 en 12 b et le repousse vers la gauche, pour ramener le tiroir 7 en position repos fig.4; l'eau contenue dans le vérin est aspirée par la pompe au travers de l'électrovanne C passante hors tension dans le sens de la flèche cc fig.7; la pompe refoule aussi par le mamelon 30 fig.6 dans la grge annulaire N et les conduits M dans le cylindre 17 fig.6; mais la présence du clapet de non retour 27 fig.6 s'opposant au passage de l'eau contenue dans la chambre 35 fig.4 formée dans le piston creux 3 sous le piston 4; le piston 4 est donc maintenu en position haute fig.2, le piston 16 coulissant dans le cylindre 17 et solidaire par la tige 15 du piston 16 ne peut descendre.The pump continues to operate, the water under pressure arrives at the cylinder 12 at 12 b and pushes it to the left, to bring the drawer 7 to the rest position fig.4; the water contained in the jack is sucked up by the pump through the solenoid valve C passing without voltage in the direction of the arrow cc fig.7; the pump also delivers through the nipple 30 fig.6 in the annular barge N and the conduits M in the cylinder 17 fig.6; but the presence of the non-return valve 27 fig.6 opposing the passage of the water contained in the chamber 35 fig.4 formed in the hollow piston 3 under the piston 4; the piston 4 is therefore held in the high position fig.2, the piston 16 sliding in the cylinder 17 and secured by the rod 15 of the piston 16 can not descend.

L'évacuation de l'eau de la chambre 34 fig.4 se fera par le conduit r aboutissant au distributeur B. fig.4 lorsque le tiroir 7 bien parvenu en position repos mettra en concordance le conduit P de l'évidement 9 avec le dit distributeur B. fig.4The evacuation of the water from the chamber 34 fig.4 will be done by the conduit r leading to the distributor B. fig.4 when the drawer 7 has reached the rest position will bring the conduit P of the recess 9 into line with the says distributor B. fig. 4

Dans son mouvement de descente, le piston 16 fig.2 entrai- nera le piston 4 en position basse.In its downward movement, the piston 16 fig.2 will drive the piston 4 in the low position.

Cette conception permet au tiroir 7, puisque le piston 4 affleure en cette position fig.2 sa face inférieure, d'entrai- ner la totalité de la galette de café épuisé se trouvant dans l'évidement 9.This design allows the drawer 7, since the piston 4 to be flush with its underside in fig.2, to drive all of the spent coffee cake in the recess 9.

Le tiroir 7 parvenu en position repos fig.3, l'eau contenue dans la chambre 33 fig.2 s'évacue par le conduit K fig.5 et 6 par le conduit r ayant son origine dans la chambre 28a au dessus de la bille 28 du clapet non retour 27 qui débouche en "r'" dans le distributeur B, de là par le conduit P qui aboutit dans la chambre 11 au dessus du filtre 10 de l'évidement 9; cette eau expulse l'intégralité du marc de café épuisé dans l'entonnoir 5 fig. 1 et lave le filtre 10 à contre-courant.The slide 7 having reached the rest position fig.3, the water contained in the chamber 33 fig.2 is evacuated by the conduit K fi g .5 and 6 by the conduit r having its origin in the chamber 28a above the ball 28 of the non-return valve 27 which opens at "r '" in the distributor B, from there by the conduit P which terminates in the chamber 11 above the filter 10 of the recess 9; this water expels all of the spent coffee grounds in the funnel 5 fig. 1 and wash the filter 10 against the current.

Le piston 16 arrivant à fond de course rencontre le levier 35 commandant le minirupteur 36 qui arrête la pompe.The piston 16 arriving at the full stroke meets the lever 35 controlling the microswitch 36 which stops the pump.

Le robinet E donne la faculté d'évacuer par le conduit S, lorsque l'on agit sur lui, en cas d'erreur de dosage de mouture l'eau contenue dans la chambre 33 fig. 2 autorisant le retour du tiroir 7 en position repos et démarrage d'un nouveau cycle.The tap E gives the option of evacuating via the pipe S, when it is acted upon, in the event of a grinding dosage error the water contained in the chamber 33 fig. 2 authorizing the return of the drawer 7 to the rest position and starting a new cycle.

Claims (10)

1 - Ensemble opératoire pour l'infusion de doses de café express ou autres boissons similaires caractérisé par le fait qu'il comprend une pièce mobile animée d'un mouvement rectiligne ou autres, d'aller et retour entre une position repos et une position travail, pièce dénommée tiroir dans le cas d'un mouvement rectiligne alternatif qui comporte un passage pour l'admission de la dose de mouture de café, coaxial en position repos, avec un piston infuseur en position basse pour former une chambre de réception de la mouture et, un évidement usiné sur sa face inférieure, qui devient coaxial en position travail avec le piston infuseur qui se déplace alors de la position basse à la position haute, ce qui délimite.la chambre d'infusion dans le dit évidement; position qu'il garde pendant l'infusion et le retour du tiroir qui emporte la galette de marc de café épuisé jusqu'à sa position de repos où s'effectue l'éjection du marc et le retour du piston infuseur en position basse pour permettre le démarrage d'un nouveau cycle.1 - Operating set for the infusion of doses of express coffee or other similar drinks characterized by the fact that it comprises a moving part driven by a rectilinear movement or the like, going back and forth between a rest position and a work position , a part called a drawer in the case of an alternative rectilinear movement which includes a passage for the admission of the dose of coffee grinding, coaxial in the rest position, with an infusing piston in the low position to form a chamber for receiving the grinding and, a recess machined on its underside, which becomes coaxial in the working position with the infusing piston which then moves from the low position to the high position, which delimits the brewing chamber in said recess; position it keeps during the infusion and the return of the drawer which carries the cake of spent coffee grounds to its rest position where the ejection of the grounds is carried out and the return of the infusing piston to the low position to allow the start of a new cycle. 2 - Ensemble opératoire selon la revendication 1 caractérisé par le fait que la chambre d'infusion peut être alimentée de bas en haut pour une meilleure extraction des substances aromatiques du café, ou d'une manière plus classique de haut en bas.2 - Operating set according to claim 1 characterized in that the infusion chamber can be fed from bottom to top for better extraction of aromatic substances from the coffee, or in a more conventional way from top to bottom. 3 - Ensemble opératoire selon les revendications 1 et 2 caractérisé par le fait que l'éjection du marc peut se faire par un lavage à contre-courant du filtre démoulant et dissolvant la galette de marc de café épuisé pour l'évacuation par la vidange, ou par un système connu, à piston ou autre, pour évacuer des galettes sèches de marc de café épuisé.3 - Operating set according to claims 1 and 2 characterized in that the ejection of the grounds can be done by washing against the current of the release filter and dissolving the cake of spent coffee grounds for evacuation by emptying, or by a known system, piston or other, to evacuate dry patties of spent coffee grounds. 4 - Ensemble opératoire conforme aux revendications 1 2 et 3 caractérisé par le fait que le piston infuseur remplit plusieurs fonctions : Délimiter la chambre d'infusion dans l'évidement du tiroir en position travail, effectuer l'admission d'eau chaude d'infusion en ouvant un clapet lorsqu'il arrive en fin de course, porter sur sa partie supérieure la grille de diffusion de l'eau d'infusion, ou de filtration de l'infusion café. 4 - Operating assembly according to claims 1 2 and 3 characterized in that the infusing piston fulfills several functions: Delimit the brewing chamber in the recess of the drawer in the working position, admit hot brewing water by opening a valve when it reaches the end of its travel, carry the diffusion grid on its upper part. infusion water, or coffee infusion filtration. 5 - Ensemble opératoire selon la revendication 4 carac térisé par le fait que l'ensemble piston infuseur, après avoir ouvert le clapet d'infusion ne peut redescendre par l'application d'une même pression d'eau sur deux faces inégales et opposées d'un piston, parce que son circuit d'alimentation comporte un clapet de non retour qui maintient le volume d'eau sous piston.5 - Operating set according to claim 4 charac terized in that the infuser piston assembly, after opening the infusion valve can not descend by the application of the same water pressure on two unequal and opposite sides d 'a piston, because its supply circuit includes a non-return valve which maintains the volume of water under the piston. 6 - Ensemble opératoire conforme aux revendications 1 2 3 4 et 5 caractérisé par le fait qu'un seul joint plat suffit pour étancher la chambre d'infusion, et , ne recevant une poussée hydraulique qu'au moment de l'infusion, cela procure une très grande souplesse de translation du tiroir et élimine l'usure du joint par friction.6 - Operating assembly according to claims 1 2 3 4 and 5 characterized in that a single flat seal is sufficient to seal the infusion chamber, and, receiving a hydraulic thrust only at the time of infusion, this provides very high translational flexibility of the drawer and eliminates wear of the seal by friction. 7 - Ensemble opératoire conforme à la revendication 6 caractérisé par le fait que le tiroir remplit le rôle de distributeurs : d'eau chaude pour l'infusion du café, de sortie de café infusé et d'eau pour l'éjection du marc épuisé et de nettoyage du filtre et de la chambre d'infusion. 7 - Operating assembly according to claim 6 characterized in that the drawer fulfills the role of distributors: hot water for brewing coffee, brewed coffee outlet and water for ejecting spent coffee grounds and cleaning the filter and brewing chamber. 8 - Ensemble opératoire selon la revendication 7 caractérisé par le fait que les portées d'étancheité à faible coefficient de frottement des divers distributeurs appliquées sur le tiroir savent aussi de guidage à son mouvement de translation.8 - Operating set according to claim 7 characterized in that the sealing surfaces with low coefficient of friction of the various distributors applied to the drawer also know guiding its translational movement. 9 - Ensemble opératoire conforme à la revendication 1 caractérisé par le fait que pour déplacer le tiroir, la pompe aspire l'eau sur une face du piston du vérin pour la refouler sur l'autre face.9 - Operating assembly according to claim 1 characterized in that to move the drawer, the pump sucks water on one side of the piston of the cylinder to discharge it on the other side. 10 - Ensemble opératoire conforme aux revendications 1 à 9 caractérisé parla rapidité de répétition des cycles due au faible frottement, au positionnement des vérins par butées et du temps de décompression minimum de la chambre, d'infusion.10 - Operating set according to claims 1 to 9 characterized by rapid repetition of cycles due to low friction, positioning of the cylinders by stops and the minimum decompression time of the chamber, infusion.
EP19780430005 1977-07-18 1978-07-12 Automatic infusion machine for preparing coffee and similar beverages Expired EP0000685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7722992A FR2397815A1 (en) 1977-07-18 1977-07-18 FULLY AUTOMATIC OPERATING KIT FOR THE INFUSION OF DOSES OF ESPRESS COFFEE OR OTHER SIMILAR BEVERAGES
FR7722992 1977-07-18

Publications (2)

Publication Number Publication Date
EP0000685A1 true EP0000685A1 (en) 1979-02-07
EP0000685B1 EP0000685B1 (en) 1982-09-15

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EP (1) EP0000685B1 (en)
DE (1) DE2862027D1 (en)
FR (1) FR2397815A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0015379A1 (en) * 1979-02-12 1980-09-17 EASTMAN KODAK COMPANY (a New Jersey corporation) Regeneration of rhodium hydroformylation catalysts
EP0237475A1 (en) * 1986-03-08 1987-09-16 Cafina AG Piston and cylinder unit for a coffee machine, and its operating method
EP0379651A1 (en) * 1988-12-23 1990-08-01 HGZ Maschinenbau AG Automatic machine for the preparation of coffee
EP1523913A2 (en) * 2003-10-07 2005-04-20 Lothar Steigerwald Method for preparing and dispensing liquid food, in particular coffee, tea, soup or the like in a vehicle, in particular a car
CZ301066B6 (en) * 2000-05-09 2009-10-29 Societe Des Produits Nestle S. A. Apparatus for extracting substance used for preparation of beverage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074333A1 (en) * 1981-08-25 1983-03-16 M. Schaerer A.G. Hydraulic motor for the working piston of a coffee machine
MX2008003736A (en) 2005-04-11 2009-01-29 Starbucks Corp Machine for brewing a beverage such as coffee and related method.
WO2007027206A2 (en) 2005-04-11 2007-03-08 Coffee Equipment Company Machine for brewing a beverage such as coffee and related method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR539887A (en) * 1920-09-04 1922-07-01 Automatic machine for rapid preparation of coffee
FR550958A (en) * 1921-05-11 1923-03-24 Anonima La Victoria Arduino So Automatic machine for brewing coffee
DE608395C (en) * 1930-12-05 1935-01-23 Enrico Pistoni Device for preparing coffee infusion or the like.
FR1145439A (en) * 1955-03-23 1957-10-25 Gaggia Brevetti Machine for automatically producing coffee infusions
FR1373832A (en) * 1963-08-22 1964-10-02 Organizzazione Novi S R L Automatic machine for preparing espresso
FR1391610A (en) * 1964-05-05 1965-03-05 Paliz A G Coffee machine
US3369478A (en) * 1966-04-22 1968-02-20 Vendo Co Single cup, dry waste coffee brewing and dispensing mechanism
FR2042844A5 (en) * 1969-04-05 1971-02-12 Rossi Gino
FR2119113A5 (en) * 1970-12-21 1972-08-04 Armaboldi Cesare
FR2267073A1 (en) * 1974-04-11 1975-11-07 Imd

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR539887A (en) * 1920-09-04 1922-07-01 Automatic machine for rapid preparation of coffee
FR550958A (en) * 1921-05-11 1923-03-24 Anonima La Victoria Arduino So Automatic machine for brewing coffee
DE608395C (en) * 1930-12-05 1935-01-23 Enrico Pistoni Device for preparing coffee infusion or the like.
FR1145439A (en) * 1955-03-23 1957-10-25 Gaggia Brevetti Machine for automatically producing coffee infusions
FR1373832A (en) * 1963-08-22 1964-10-02 Organizzazione Novi S R L Automatic machine for preparing espresso
FR1391610A (en) * 1964-05-05 1965-03-05 Paliz A G Coffee machine
US3369478A (en) * 1966-04-22 1968-02-20 Vendo Co Single cup, dry waste coffee brewing and dispensing mechanism
FR2042844A5 (en) * 1969-04-05 1971-02-12 Rossi Gino
FR2119113A5 (en) * 1970-12-21 1972-08-04 Armaboldi Cesare
FR2267073A1 (en) * 1974-04-11 1975-11-07 Imd

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0015379A1 (en) * 1979-02-12 1980-09-17 EASTMAN KODAK COMPANY (a New Jersey corporation) Regeneration of rhodium hydroformylation catalysts
EP0237475A1 (en) * 1986-03-08 1987-09-16 Cafina AG Piston and cylinder unit for a coffee machine, and its operating method
EP0379651A1 (en) * 1988-12-23 1990-08-01 HGZ Maschinenbau AG Automatic machine for the preparation of coffee
CZ301066B6 (en) * 2000-05-09 2009-10-29 Societe Des Produits Nestle S. A. Apparatus for extracting substance used for preparation of beverage
EP1523913A2 (en) * 2003-10-07 2005-04-20 Lothar Steigerwald Method for preparing and dispensing liquid food, in particular coffee, tea, soup or the like in a vehicle, in particular a car
EP1523913A3 (en) * 2003-10-07 2005-10-05 Lothar Steigerwald Method for preparing and dispensing liquid fod, in particular coffee, tea, soup or the like in a vehicle, in particular a car

Also Published As

Publication number Publication date
FR2397815A1 (en) 1979-02-16
FR2397815B1 (en) 1980-07-11
DE2862027D1 (en) 1982-11-04
EP0000685B1 (en) 1982-09-15

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