WO1999049767A1 - Coffee filter-holder - Google Patents
Coffee filter-holder Download PDFInfo
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- WO1999049767A1 WO1999049767A1 PCT/EP1998/001829 EP9801829W WO9949767A1 WO 1999049767 A1 WO1999049767 A1 WO 1999049767A1 EP 9801829 W EP9801829 W EP 9801829W WO 9949767 A1 WO9949767 A1 WO 9949767A1
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- filter holder
- infusion
- flow
- filtered
- holder according
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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
- A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
- A47J31/0615—Filters or strainers for coffee or tea makers ; Holders therefor with special arrangements for making tea or the like, e.g. where the infusion liquid is kept a certain time in the filter before flowing out
Definitions
- the present invention relates to a coffee filter holder of the type comprising a body capable of receiving a filtering means inside which is placed coffee powder and receiving water previously heated, said body comprising in its lower part at minus one outlet for the flow of a filtered infusion.
- the field of application in particular although not exclusively targeted by the invention is that of household electric coffee makers, for example of the drip type, in which the cold water contained in a tank is previously heated by a resistance electric, then delivered inside the filtering means.
- the coffee filter holder of the invention can, however, also be used independently of any electrical appliance, the user himself supplying hot water.
- the large quantity of coffee powder required will prevent the brewing of the brew from being too rapid, so that brewing times sufficient to obtain getting good coffee. 2
- the grinding in the filter medium is not in sufficient quantity to slow down the flow of hot water. In this case, a poor coffee is obtained for which the duration of brewing was not sufficient.
- the present invention recommends, not to modify the flow rate of the infusion as a function of the number of cups, but to delay the start of the flow phase of the filtered infusion at the outlet of the holder. filter of a predetermined duration, regardless of the number of coffee cups.
- the coffee filter holder according to the invention is characterized in that it further comprises a member sensitive to temperature, in thermal contact with the filtered infusion, said member being adapted to pass, at a temperature of predefined setpoint, from a first position in which it forms a barrier to the flow of the filtered infusion to a second position in which it authorizes said flow, and a delay means for delaying the passage of said organ from its first position to its second position.
- the timing means introduces a delay between the moment when the filtered infusion is at an actual temperature capable of causing the temperature-sensitive member to pass into its second position allowing the flow and the moment when said organ 3 effectively measures an image temperature of this real temperature.
- the combination according to the invention of the temperature-sensitive member and the delay means introducing the delay guarantees that the hot water will remain in contact with the ground coffee for a minimum duration, regardless of the quantity of coffee to be made.
- FIG. 2 illustrates in vertical section the filter holder of Figure 1, in the open position of the barrier means
- FIG. 3 illustrates a second embodiment of a filter holder according to the present invention
- a coffee filter holder conventionally comprises a body 1 defining an infusion chamber inside which a filter means 2 such as a disposable paper filter shown in broken lines in the figures.
- the coffee powder (not shown) is then placed inside the filtering means 2 which receives, through the open upper part 10 of the body 1, water previously heated, for example to 90 ° C.
- the body 1 may have the shape of a funnel, preferably made of plastic, and comprises in its lower part, at least one outlet orifice 11 for the flow of a filtered infusion.
- the filter holder further comprises a member sensitive to temperature and placed in thermal contact with the filtered infusion, this member being liable to pass, at a predetermined set temperature, from a first position in which the filtered infusion cannot flow, to a second position allowing the flow.
- this member is constituted by a bimetallic disc 30, placed inside a part forming an intermediate chamber 31.
- This intermediate chamber 31 has in its lower wall 32, an opening 33 substantially circular, placed under the bimetallic disc 30, concentrically to the latter.
- the dimension of the opening 33 is smaller than that of the bimetallic disc 30 so that the edge of the opening forms a seat for the disc.
- a seal J provides the seal between the body 1 and the part forming an intermediate chamber. 5
- the filter holder according to the invention also comprises a delay means delaying the passage of the temperature-sensitive member from its first shut-off position to its second position allowing the flow of the infusion.
- this time delay means is produced by a coating 34 made of a material with low thermal conductivity, for example rubber, covering at least partially the face of the bimetallic disc 30 in contact with the infusion, the coating having a thickness depending on the delay that one wishes to obtain.
- the bi-metallic disc 30 In the first so-called rest position of the bimetallic disc 30 shown in FIG. 1, this position corresponding to a non-use of the filter holder or at the start of an infusion process, the bi-metallic disc 30 has a camber convex such that its peripheral edge on the side of the covering 34, is pressed against the seat formed by the edge of the opening 33.
- the filtered infusion from the outlet orifice therefore fills the intermediate chamber formed by the part 31 and comes into thermal contact with the bimetallic disc, but cannot flow through the opening 33.
- the seal at the level of the seat is reinforced by the presence of the covering 34.
- the bimetallic disc 30 is adjusted to reverse its camber at a predetermined set temperature, for example 75 ° C. This inversion of camber is 6 takes place after a certain time corresponding to the delay introduced by the coating 34, previously at which the bimetallic disc blocks the flow of the infusion. This delay is fixed here by the thickness of the coating, depending on the material used.
- the disc forming the temperature-sensitive member and the coating forming a time delay means are designed to allow the flow of the infusion after a fixed period, advantageously equal to approximately 1 minute and 30 seconds.
- the lower wall 32 of the part forming an intermediate chamber 31 advantageously extends below the opening 33 by a frustoconical base 35 provided with an outlet orifice 36, of so as to channel the flow of the filtered infusion.
- the bimetallic disc 30 is held in place inside the intermediate chamber 31 by any means, for example by an arm 37 coming from the frustoconical base 35, and by a rivet 38.
- the outlet orifice 11 of the body 1 of the filter holder is placed so as to allow lateral flow of the filtered infusion into a reservoir 4 adjoining said body.
- the reservoir 4 extends vertically along the body 1, and has a lower opening end on which is fixed concentrically the assembly 3 comprising the reference elements 30 to 39 previously described.
- the vertical wall of the reservoir 4 is preferably transparent, which allows a user to view the level of infusion filtered inside the reservoir.
- the inversion of the camber of the bimetallic disc could displace a separate obturator means preventing or on the contrary allowing, depending on the camber, the flow of the infusion.
- bimetallic disc can be generalized to any member sensitive to a set temperature, for example a linear bimetallic strip or a shape memory alloy, capable of being in two positions as a function of the temperature, and to control the barrage or the flow of the infusion.
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- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
Abstract
The invention concerns a coffee filter-holder, in particular but not exclusively for electric household coffee maker, comprising a body (1) capable of receiving filtering means (2) wherein is placed the coffee powder and receiving previously heated water, said body (1) comprising in its lower part at least an outlet (11) to allow a filtered infusion to flow through. The invention is characterised in that the filter-holder further comprises a temperature-sensitive member (30) in thermal contact with the filtered infusion, said member being adapted to pass, at a predetermined set temperature, from a first position wherein it prevents the filtered infusion from flowing through to a second position wherein it allows said flow, and timing means (34) for delaying the passage of said member (30) from its first to its second position.
Description
PORTE-FILTRE A CAFE COFFEE FILTER HOLDER
La présente invention concerne un porte-filtre à café du type comportant un corps susceptible de recevoir un moyen filtrant à l'intérieur duquel est placée de la poudre de café et recevant de l'eau préalablement chauffée, ledit corps comportant dans sa partie inférieure au moins un orifice de sortie pour l'écoulement d'une infusion filtrée.The present invention relates to a coffee filter holder of the type comprising a body capable of receiving a filtering means inside which is placed coffee powder and receiving water previously heated, said body comprising in its lower part at minus one outlet for the flow of a filtered infusion.
Le domaine d'application notamment bien que non exclusivement visé par l'invention est celui des cafetières ménagères électriques, par exemple du type goutte-à- goutte, dans lesquelles l'eau froide contenue dans un ré- servoir est préalablement chauffée par une résistance électrique, puis délivrée à l'intérieur du moyen filtrant.The field of application in particular although not exclusively targeted by the invention is that of household electric coffee makers, for example of the drip type, in which the cold water contained in a tank is previously heated by a resistance electric, then delivered inside the filtering means.
Le porte-filtre à café de 1 ' invention peut cepen- dant également être utilisé indépendamment de tout appareil électrique, l'utilisateur fournissant lui-même de 1 ' eau chaude.The coffee filter holder of the invention can, however, also be used independently of any electrical appliance, the user himself supplying hot water.
Dans ce type dé porte-filtre à café, il est connu que la qualité de l'infusion filtrée obtenue dépend fortement de la quantité de café à préparer. En effet, la quantité de poudre à café versée dans le moyen filtrant va venir influencer la vitesse de passage de l'eau chaude dans le moyen filtrant.In this type of coffee filter holder, it is known that the quality of the filtered infusion obtained strongly depends on the quantity of coffee to be prepared. In fact, the quantity of coffee powder poured into the filtering means will influence the speed of passage of hot water through the filtering means.
Plus précisément, lorsque l'on doit préparer un nombre important de tasses de café, la forte quantité de poudre de café nécessaire empêchera un écoulement trop rapide de l'infusion de sorte que l'on arrive à obtenir des durées d'infusion suffisantes pour l'obtention d'un bon café.
2 En revanche, dans le cas de la préparation d'un faible nombre de tasses de café, la mouture dans le moyen filtrant n'est pas en quantité suffisante pour ralentir l'écoulement de l'eau chaude. On obtient dans ce cas un café médiocre pour lequel la durée d'infusion n'a pas été suffisante.More precisely, when a large number of cups of coffee have to be prepared, the large quantity of coffee powder required will prevent the brewing of the brew from being too rapid, so that brewing times sufficient to obtain getting good coffee. 2 On the other hand, in the case of the preparation of a small number of cups of coffee, the grinding in the filter medium is not in sufficient quantity to slow down the flow of hot water. In this case, a poor coffee is obtained for which the duration of brewing was not sufficient.
Il est déjà connu dans des porte-filtre à café actuellement sur le marché de munir 1 ' orifice de sortie du porte-filtre de moyens mécaniques de réglage du débit de l'infusion en fonction du nombre de tasses désiré. Un tel porte-filtre est par exemple décrit dans le document FR- A-2 454 784.It is already known in coffee filter holders currently on the market to provide the outlet port of the filter holder with mechanical means for adjusting the infusion rate as a function of the number of cups desired. Such a filter holder is for example described in the document FR-A-2 454 784.
De manière différente, la présente invention préconise, non pas de modifier le débit d'écoulement de l'infusion en fonction du nombre de tasses, mais de retarder le début de la phase d'écoulement de l'infusion filtrée en sortie du porte-filtre d'une durée prédéterminée, in- dépendamment du nombre de tasses à café.In a different way, the present invention recommends, not to modify the flow rate of the infusion as a function of the number of cups, but to delay the start of the flow phase of the filtered infusion at the outlet of the holder. filter of a predetermined duration, regardless of the number of coffee cups.
Plus précisément, le porte-filtre à café selon l'invention est caractérisé en ce qu'il comporte en outre un organe sensible à la température, en contact thermique avec l'infusion filtrée, ledit organe étant adapté pour passer, à une température de consigne prédéfinie, d'une première position dans laquelle il forme barrage à l'écoulement de l'infusion filtrée à une seconde position dans laquelle il autorise ledit écoulement, et un moyen de temporisation pour retarder le passage dudit organe de sa première position à sa seconde position.More specifically, the coffee filter holder according to the invention is characterized in that it further comprises a member sensitive to temperature, in thermal contact with the filtered infusion, said member being adapted to pass, at a temperature of predefined setpoint, from a first position in which it forms a barrier to the flow of the filtered infusion to a second position in which it authorizes said flow, and a delay means for delaying the passage of said organ from its first position to its second position.
En d'autres termes, le moyen de temporisation introduit un retard entre le moment où l'infusion filtrée est à une température réelle susceptible de faire passer l'organe sensible à la température dans sa seconde position autorisant l'écoulement et le moment où ledit organe
3 mesure effectivement une température image de cette température réelle.In other words, the timing means introduces a delay between the moment when the filtered infusion is at an actual temperature capable of causing the temperature-sensitive member to pass into its second position allowing the flow and the moment when said organ 3 effectively measures an image temperature of this real temperature.
Ceci est d'autant plus important lorsque l'on doit préparer une faible quantité de café. En effet, dans ce cas, l'eau préalablement chauffée arrive très rapidement au niveau de l'organe sensible à la température, en raison de la faible quantité de mouture à traverser.This is all the more important when you have to prepare a small amount of coffee. Indeed, in this case, the previously heated water arrives very quickly at the temperature-sensitive member, due to the small amount of ground coffee to pass through.
Sans la présence du moyen de temporisation, cela provoquerait instantanément le passage dudit organe dans sa seconde position autorisant l'écoulement, ce qui ne permettrait pas de remplir l'objectif recherché.Without the presence of the time delay means, this would instantly cause said member to pass into its second position allowing flow, which would not allow the desired objective to be fulfilled.
Ainsi, la combinaison selon l'invention de l'organe sensible à la température et du moyen de temporisation introduisant le retard garantit que 1 ' eau chaude restera en contact avec la mouture pendant une durée minimum, indépendamment de la quantité de café à faire.Thus, the combination according to the invention of the temperature-sensitive member and the delay means introducing the delay guarantees that the hot water will remain in contact with the ground coffee for a minimum duration, regardless of the quantity of coffee to be made.
L'invention, ainsi que les avantages qu'elle procure, seront mieux compris au vu de la description ci- après d'exemples de réalisation possible, faite en référence aux figures annexées, dans lesquelles : - la figure 1 illustre schématiquement en coupe verticale un premier mode de réalisation d'un porte-filtre conforme à la présente invention en position de barrage à l'écoulement de l'infusion filtrée ;The invention, as well as the advantages which it provides, will be better understood in the light of the description below of possible embodiments, made with reference to the appended figures, in which: - Figure 1 schematically illustrates in vertical section a first embodiment of a filter holder according to the present invention in the barrier position to the flow of the filtered infusion;
- la figure 2 illustre en coupe verticale le porte- filtre de la figure 1, en position d'ouverture du moyen de barrage ;- Figure 2 illustrates in vertical section the filter holder of Figure 1, in the open position of the barrier means;
- la figure 3 illustre un second mode de réalisation d'un porte-filtre conforme à la présente invention ;- Figure 3 illustrates a second embodiment of a filter holder according to the present invention;
- la figure 4 illustre le porte-filtre en coupe verticale selon la ligne X,X' de la figure 3.
4 Comme représenté sur les figures 1 et 2, un porte- filtre à café, selon un premier mode de réalisation possible conforme à l'invention, comporte classiquement un corps 1 définissant une chambre d'infusion à l'intérieur de laquelle on place un moyen filtrant 2 tel qu'un filtre à papier jetable représenté en trait interrompu sur les figures. La poudre à café (non représentée) est ensuite placée à l'intérieur du moyen filtrant 2 qui reçoit, par la partie supérieure ouverte 10 du corps 1, de l'eau préalablement chauffée, par exemple à 90°C. Le corps 1 peut présenter la forme d'un entonnoir, de préférence en matière plastique, et comporte dans sa partie inférieure, au moins un orifice de sortie 11 pour l'écoulement d'une infusion filtrée.- Figure 4 illustrates the filter holder in vertical section along line X, X 'of Figure 3. 4 As shown in FIGS. 1 and 2, a coffee filter holder, according to a first possible embodiment in accordance with the invention, conventionally comprises a body 1 defining an infusion chamber inside which a filter means 2 such as a disposable paper filter shown in broken lines in the figures. The coffee powder (not shown) is then placed inside the filtering means 2 which receives, through the open upper part 10 of the body 1, water previously heated, for example to 90 ° C. The body 1 may have the shape of a funnel, preferably made of plastic, and comprises in its lower part, at least one outlet orifice 11 for the flow of a filtered infusion.
Selon une première caractéristique importante de la présente invention, le porte-filtre comporte en outre un organe sensible à la température et placé en contact thermique avec l'infusion filtrée, cet organe étant sus- ceptible de passer, à une température de consigne prédéterminée, d'une première position dans laquelle l'infusion filtrée ne peut s'écouler, à une seconde position autorisant 1 ' écoulement.According to a first important characteristic of the present invention, the filter holder further comprises a member sensitive to temperature and placed in thermal contact with the filtered infusion, this member being liable to pass, at a predetermined set temperature, from a first position in which the filtered infusion cannot flow, to a second position allowing the flow.
Sur les figures 1 et 2 , cet organe est constitué par un disque bimétallique 30, placé à l'intérieur d'une pièce formant une chambre intermédiaire 31. Cette chambre intermédiaire 31 présente dans sa paroi inférieure 32, une ouverture 33 sensiblement circulaire, placée sous le disque bimétallique 30, concentriquement à ce dernier. La dimension de l'ouverture 33 est inférieure à celle du disque bimétallique 30 de façon à ce que le bord de l'ouverture forme siège pour le disque. Un joint J réalise l'étanchéité entre le corps 1 et la pièce formant chambre intermédiaire.
5 Selon une deuxième caractéristique importante, le porte-filtre conforme à l'invention comprend également un moyen de temporisation retardant le passage de l'organe sensible à la température de sa première position d'obtu- ration à sa seconde position autorisant l'écoulement de 1' infusion.In FIGS. 1 and 2, this member is constituted by a bimetallic disc 30, placed inside a part forming an intermediate chamber 31. This intermediate chamber 31 has in its lower wall 32, an opening 33 substantially circular, placed under the bimetallic disc 30, concentrically to the latter. The dimension of the opening 33 is smaller than that of the bimetallic disc 30 so that the edge of the opening forms a seat for the disc. A seal J provides the seal between the body 1 and the part forming an intermediate chamber. 5 According to a second important characteristic, the filter holder according to the invention also comprises a delay means delaying the passage of the temperature-sensitive member from its first shut-off position to its second position allowing the flow of the infusion.
Sur les figures 1 et 2 , ce moyen de temporisation est réalisé par un revêtement 34 en un matériau à faible conductivité thermique, par exemple en caoutchouc, recouvrant au moins partiellement la face du disque bimétallique 30 en contact avec l'infusion, le revêtement ayant une épaisseur fonction du retard que l'on souhaite obtenir.In FIGS. 1 and 2, this time delay means is produced by a coating 34 made of a material with low thermal conductivity, for example rubber, covering at least partially the face of the bimetallic disc 30 in contact with the infusion, the coating having a thickness depending on the delay that one wishes to obtain.
Dans la première position dite de repos du disque bimétallique 30 représentée sur la figure 1, cette position correspondant à une non-utilisation du porte-filtre ou au début d'un processus d'infusion, le disque bi é- tallique 30 présente une cambrure convexe telle que son bord périphérique du côté du revêtement 34, se trouve plaqué contre le siège formé par le bord de l'ouverture 33.In the first so-called rest position of the bimetallic disc 30 shown in FIG. 1, this position corresponding to a non-use of the filter holder or at the start of an infusion process, the bi-metallic disc 30 has a camber convex such that its peripheral edge on the side of the covering 34, is pressed against the seat formed by the edge of the opening 33.
L'infusion filtrée issue de l'orifice de sortie remplit donc la chambre intermédiaire formée par la pièce 31 et entre en contact thermique avec le disque bimétallique, mais ne peut s'écouler au travers de l'ouverture 33.The filtered infusion from the outlet orifice therefore fills the intermediate chamber formed by the part 31 and comes into thermal contact with the bimetallic disc, but cannot flow through the opening 33.
De manière avantageuse, on constate que l'étan- chéité au niveau du siège est renforcée par la présence du revêtement 34.Advantageously, it can be seen that the seal at the level of the seat is reinforced by the presence of the covering 34.
Le disque bimétallique 30 est réglé pour inverser sa cambrure à une température de consigne prédéterminée, par exemple de 75°C. Cette inversion de cambrure s'ef-
6 fectue au bout d'un certain temps correspondant au retard introduit par le revêtement 34, antérieurement auquel le disque bimétallique fait barrage à l'écoulement de l'infusion. Ce retard est fixé ici par l'épaisseur du revête- ment, en fonction du matériau utilisé. De préférence, le disque formant l'organe sensible à la température et le revêtement formant moyen de temporisation sont conçus pour autoriser l'écoulement de l'infusion au bout d'une durée fixe, égale avantageusement à environ 1 minute et 30 secondes.The bimetallic disc 30 is adjusted to reverse its camber at a predetermined set temperature, for example 75 ° C. This inversion of camber is 6 takes place after a certain time corresponding to the delay introduced by the coating 34, previously at which the bimetallic disc blocks the flow of the infusion. This delay is fixed here by the thickness of the coating, depending on the material used. Preferably, the disc forming the temperature-sensitive member and the coating forming a time delay means are designed to allow the flow of the infusion after a fixed period, advantageously equal to approximately 1 minute and 30 seconds.
Après inversion de la cambrure du disque, ce dernier se trouve dans la position illustrée sur la figure 2. Comme on peut le constater, le bord périphérique du disque 30 s'est éloigné du siège. En conséquence, l'infusion jusque-là retenue va pouvoir s'écouler au travers de 1 ' ouverture 33.After reversing the camber of the disc, the latter is in the position illustrated in FIG. 2. As can be seen, the peripheral edge of the disc 30 has moved away from the seat. Consequently, the infusion hitherto retained will be able to flow through the opening 33.
Comme on l'a représenté sur les figures 1 et 2 , la paroi inférieure 32 de la pièce formant chambre intermédiaire 31 se prolonge avantageusement en-deçà de l'ouverture 33 par une embase tronconique 35 munie d'un orifice de sortie 36, de façon à canaliser l'écoulement de l'infusion filtrée.As shown in FIGS. 1 and 2, the lower wall 32 of the part forming an intermediate chamber 31 advantageously extends below the opening 33 by a frustoconical base 35 provided with an outlet orifice 36, of so as to channel the flow of the filtered infusion.
Le disque bimétallique 30 est maintenu en place à l'intérieur de la chambre intermédiaire 31 par tout moyen, par exemple par un bras 37 venu de l'embase tronconique 35, et par un rivet 38.The bimetallic disc 30 is held in place inside the intermediate chamber 31 by any means, for example by an arm 37 coming from the frustoconical base 35, and by a rivet 38.
Dans l'exemple de réalisation jusqu'ici décrit, l'orifice de sortie 11 du porte-filtre est placé sur un axe vertical du corps 1, et permet un écoulement vertical de l'infusion. La pièce formant chambre intermédiaire est, quant à elle, fixée sous le porte-filtre concentriquement à l'orifice de sortie 11, par tout moyen connu.
7 Les figures 3 et 4 illustrent un deuxième mode de réalisation possible conforme à l'invention:In the embodiment so far described, the outlet orifice 11 of the filter holder is placed on a vertical axis of the body 1, and allows a vertical flow of the infusion. The part forming an intermediate chamber is, for its part, fixed under the filter holder concentrically with the outlet orifice 11, by any known means. 7 Figures 3 and 4 illustrate a second possible embodiment in accordance with the invention:
Dans ce mode de réalisation, l'orifice de sortie 11 du corps 1 du porte-filtre est placé de manière à permettre un écoulement latéral de l'infusion filtrée dans un réservoir 4 attenant audit corps. Le réservoir 4 s'étend verticalement le long du corps 1, et présente une extrémité inférieure débouchante sur laquelle est fixé concentriquement l'ensemble 3 comprenant les éléments de référence 30 à 39 précédemment décrits.In this embodiment, the outlet orifice 11 of the body 1 of the filter holder is placed so as to allow lateral flow of the filtered infusion into a reservoir 4 adjoining said body. The reservoir 4 extends vertically along the body 1, and has a lower opening end on which is fixed concentrically the assembly 3 comprising the reference elements 30 to 39 previously described.
La paroi verticale du réservoir 4 est de préférence transparente, ce qui permet à un utilisateur de visuali- ser le niveau d'infusion filtré à l'intérieur du réservoir.The vertical wall of the reservoir 4 is preferably transparent, which allows a user to view the level of infusion filtered inside the reservoir.
Bien entendu, d'autres formes de réalisation d'un porte-filtre peuvent être envisagées sans se départir du cadre de 1 * invention :Of course, other embodiments of a filter holder can be envisaged without departing from the scope of the invention:
Ainsi, l'inversion de la cambrure du disque bimétallique pourrait venir déplacer un moyen obturateur distinct venant empêcher ou au contraire permettre, selon la cambrure, l'écoulement de l'infusion.Thus, the inversion of the camber of the bimetallic disc could displace a separate obturator means preventing or on the contrary allowing, depending on the camber, the flow of the infusion.
Par ailleurs, l'utilisation d'un disque bimétallique peut être généralisée à tout organe sensible à une température de consigne, par exemple un bilame linéaire ou un alliage à mémoire de forme, susceptible de se trouver dans deux positions en fonction de la température, et de commander le barrage ou l'écoulement de l'infusion.
Furthermore, the use of a bimetallic disc can be generalized to any member sensitive to a set temperature, for example a linear bimetallic strip or a shape memory alloy, capable of being in two positions as a function of the temperature, and to control the barrage or the flow of the infusion.
Claims
1. Porte-filtre à café, notamment mais non exclusivement pour cafetière ménagère électrique, du type com- portant un corps (1) susceptible de recevoir un moyen filtrant (2) à l'intérieur duquel est placée de la poudre de café et recevant de l'eau préalablement chauffée, ledit corps (1) comportant dans sa partie inférieure au moins un orifice de sortie (11) pour l'écoulement d'une infusion filtrée, caractérisé en ce qu'il comporte en outre un organe (30) sensible à la température, en contact thermique avec l'infusion filtrée, ledit organe étant adapté pour passer, à une température de consigne prédéfinie, d'une pre- ière position dans laquelle il forme barrage à l'écoulement de l'infusion filtrée à une seconde position dans laquelle il autorise ledit écoulement, et un moyen (34) de temporisation pour retarder le passage dudit organe (30) de sa première position à sa seconde position.1. Coffee filter holder, in particular but not exclusively for an electric household coffee maker, of the type comprising a body (1) capable of receiving a filtering means (2) inside which is placed coffee powder and receiving water previously heated, said body (1) comprising in its lower part at least one outlet orifice (11) for the flow of a filtered infusion, characterized in that it also comprises a member (30) sensitive to temperature, in thermal contact with the filtered infusion, said member being adapted to pass, at a predefined set temperature, from a first position in which it forms a barrier to the flow of the filtered infusion at a second position in which it authorizes said flow, and means (34) for delaying to delay the passage of said member (30) from its first position to its second position.
2. Porte-filtre selon la revendication 1, caractérisé en ce que ledit organe est un organe bimétallique (30) présentant au repos une cambrure prédéfinie commandant le barrage de l'écoulement, ladite cambrure se modifiant à la température de consigne pour autoriser l'écoulement de l'infusion filtrée.2. Filter holder according to claim 1, characterized in that said member is a bimetallic member (30) having at rest a predefined camber controlling the flow barrier, said camber changing at the set temperature to allow the flow of the filtered infusion.
3. Porte-filtre selon la revendication 2, caractérisé en ce que l'organe bimétallique (30) se pré- sente sous la forme d'un disque dont la face en contact avec l'infusion est recouverte au moins partiellement d'un revêtement en un matériau faible conducteur thermique formant ledit moyen de temporisation (34) .3. Filter holder according to claim 2, characterized in that the bimetallic member (30) is in the form of a disc, the face of which in contact with the infusion is at least partially covered with a coating. made of a weak thermal conductive material forming said time delay means (34).
4. Porte-filtre selon la revendication 2, caractérisé en ce que le disque est placé à 1 ' intérieur d'une pièce formant une chambre intermédiaire (31) sensi-
9 blement cylindrique pour recevoir 1 ' infusion filtrée issue de l'orifice de sortie (11), la chambre intermédiaire présentant dans sa paroi inférieure (32) une ouverture (33) sensiblement circulaire placée sous le disque bimé- tallique (8) , concentriquement à celui-ci et de dimension inférieure à celle du disque bimétallique, de façon à ce que son bord forme siège pour le disque, en ce que le disque bimétallique présente au repos une cambrure convexe telle que le bord périphérique du disque bimétalli- que du côté du revêtement soit plaqué contre le siège, formant ainsi barrage à l'écoulement de l'infusion filtrée par ladite ouverture (33) , et en ce que la cambrure est inversée, permettant d'éloigner ledit bord périphérique du siège pour autoriser l'écoulement de l'infusion filtrée au travers de l'ouverture (33) .4. Filter holder according to claim 2, characterized in that the disc is placed 1 inside a part forming an intermediate chamber (31) sensi- 9 clearly cylindrical to receive the filtered infusion coming from the outlet orifice (11), the intermediate chamber having in its lower wall (32) a substantially circular opening (33) placed under the bimetallic disc (8), concentrically to this one and of dimension smaller than that of the bimetallic disc, so that its edge forms seat for the disc, in that the bimetallic disc presents at rest a convex camber such as the peripheral edge of the bimetallic disc of side of the covering is pressed against the seat, thus forming a barrier to the flow of the infusion filtered through said opening (33), and in that the camber is inverted, allowing said peripheral edge to be moved away from the seat to allow the flow of the filtered infusion through the opening (33).
5. Porte-filtre selon la revendication 4, caractérisé en ce que ledit revêtement (34) joue égale- ment le rôle de joint d'étanchéité lorsque le disque bimétallique est en position de repos.5. A filter holder according to claim 4, characterized in that said coating (34) also acts as a seal when the bimetallic disc is in the rest position.
6. Porte-filtre selon l'une quelconque des revendications 3 à 5, caractérisé en ce que le revêtement (34) est en caoutchouc.6. Filter holder according to any one of claims 3 to 5, characterized in that the coating (34) is made of rubber.
7. Porte-filtre selon l'une quelconque des revendications 4 à 6, caractérisé en ce que la paroi inférieure (32) de la pièce formant la chambre intermédiaire (31) se prolonge en-deçà de l'ouverture (33) par une embase tronconique (35) permettant de canaliser l'écoulement de l'infusion filtrée.7. Filter holder according to any one of claims 4 to 6, characterized in that the bottom wall (32) of the part forming the intermediate chamber (31) extends below the opening (33) by a frustoconical base (35) for channeling the flow of the filtered infusion.
8. Porte-filtre selon l'une quelconque des revendications 4 à 7,
10 caractérisé en ce que l'orifice de sortie (11) du corps porte-filtre est placé sur un axe vertical du porte-filtre pour permettre un écoulement vertical, et en ce que la pièce formant chambre intermédiaire (31) est fixée sous le porte-filtre concentriquement à l'orifice de sortie (11) .8. A filter holder according to any one of claims 4 to 7, 10 characterized in that the outlet orifice (11) of the filter holder body is placed on a vertical axis of the filter holder to allow vertical flow, and in that the part forming an intermediate chamber (31) is fixed under the filter holder concentrically with the outlet orifice (11).
9. Porte-filtre selon l'une quelconque des revendications 4 à 7 , caractérisé en ce que l'orifice de sortie (11) du corps (1) du porte-filtre est placé de manière à permettre un écoulement latéral de l'infusion filtrée dans un réservoir (4) attenant audit corps et s 'étendant verticalement le long du corps, ledit réservoir présentant une ex- trémité inférieure débouchante sur laquelle est fixée concentriquement la pièce formant chambre intermédiaire (31).9. Filter holder according to any one of claims 4 to 7, characterized in that the outlet orifice (11) of the body (1) of the filter holder is placed so as to allow lateral flow of the infusion filtered in a reservoir (4) adjoining said body and extending vertically along the body, said reservoir having a lower opening end on which is concentrically fixed the part forming an intermediate chamber (31).
10. Porte-filtre selon la revendication 9, caractérisé en ce que le réservoir (4) présente une paroi verticale transparente de manière à permettre la visualisation du niveau d'infusion filtrée dans le réservoir lors de l'utilisation du porte-filtre.10. Filter holder according to claim 9, characterized in that the reservoir (4) has a transparent vertical wall so as to allow the visualization of the level of infusion filtered in the reservoir when the filter holder is used.
11. Porte-filtre selon l'une quelconque des revendications précédentes, caractérisé en ce que l'organe (30) sensible à la température et le moyen (34) de temporisation sont conçus pour autoriser l'écoulement de l'infusion au bout d'une durée fixe égale à environ 1 minute et 30 secondes.
11. Filter holder according to any one of the preceding claims, characterized in that the member (30) sensitive to temperature and the means (34) of delay are designed to allow the flow of the infusion after '' a fixed duration equal to approximately 1 minute and 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1998/001829 WO1999049767A1 (en) | 1998-03-27 | 1998-03-27 | Coffee filter-holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1998/001829 WO1999049767A1 (en) | 1998-03-27 | 1998-03-27 | Coffee filter-holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999049767A1 true WO1999049767A1 (en) | 1999-10-07 |
Family
ID=8166925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1998/001829 WO1999049767A1 (en) | 1998-03-27 | 1998-03-27 | Coffee filter-holder |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1999049767A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20003343U1 (en) | 2000-02-24 | 2000-07-06 | Melitta Haushaltsprodukte GmbH & Co. KG, 32427 Minden | Filter device for the production of aroma extracts from coffee or tea |
| EP1338232A1 (en) * | 2002-02-19 | 2003-08-27 | Simatelex Manufactory Company Limited | Method of making coffee and coffee maker |
| US7024984B2 (en) | 2002-02-19 | 2006-04-11 | Simatelex Manufactory Co., Ltd. | Method of making coffee and coffee maker |
| EP1808110A1 (en) * | 2006-01-17 | 2007-07-18 | Wen-Ching Lee | Automatic filter tea/coffee maker |
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|---|---|---|---|---|
| US3844206A (en) * | 1971-11-19 | 1974-10-29 | R Weber | Infusor apparatus |
| DE2410620A1 (en) * | 1974-03-06 | 1975-09-18 | Wilhelm Dr Ing Lepper | Coffee or tea making appts. - has temp. and time dependant closure controlled by bimetallic strip |
| US3972273A (en) * | 1975-03-03 | 1976-08-03 | Texas Instruments Incorporated | Valve assembly with water dispersing and spreading system |
| DE2600018A1 (en) * | 1976-01-02 | 1977-07-14 | Kraft Paul | Space-saving electric coffee filter unit - includes cold water container and electrical housing for use with any pot |
| FR2454784A1 (en) | 1979-04-23 | 1980-11-21 | Maxs Ag | COFFEE FILTER FOR PERMANENT USE |
| DE3821994A1 (en) * | 1988-06-30 | 1990-01-11 | Krups Stiftung | Electrically operated appliance for preparing infused beverages, in particular tea |
| US5185505A (en) * | 1991-05-29 | 1993-02-09 | Mr. Coffee, Inc. | Microwave iced tea maker |
| JPH06343558A (en) * | 1993-06-02 | 1994-12-20 | Sharp Corp | Liquid leakage preventing device for coffee maker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3844206A (en) * | 1971-11-19 | 1974-10-29 | R Weber | Infusor apparatus |
| DE2410620A1 (en) * | 1974-03-06 | 1975-09-18 | Wilhelm Dr Ing Lepper | Coffee or tea making appts. - has temp. and time dependant closure controlled by bimetallic strip |
| US3972273A (en) * | 1975-03-03 | 1976-08-03 | Texas Instruments Incorporated | Valve assembly with water dispersing and spreading system |
| DE2600018A1 (en) * | 1976-01-02 | 1977-07-14 | Kraft Paul | Space-saving electric coffee filter unit - includes cold water container and electrical housing for use with any pot |
| FR2454784A1 (en) | 1979-04-23 | 1980-11-21 | Maxs Ag | COFFEE FILTER FOR PERMANENT USE |
| DE3821994A1 (en) * | 1988-06-30 | 1990-01-11 | Krups Stiftung | Electrically operated appliance for preparing infused beverages, in particular tea |
| US5185505A (en) * | 1991-05-29 | 1993-02-09 | Mr. Coffee, Inc. | Microwave iced tea maker |
| JPH06343558A (en) * | 1993-06-02 | 1994-12-20 | Sharp Corp | Liquid leakage preventing device for coffee maker |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 95, no. 3 28 April 1995 (1995-04-28) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20003343U1 (en) | 2000-02-24 | 2000-07-06 | Melitta Haushaltsprodukte GmbH & Co. KG, 32427 Minden | Filter device for the production of aroma extracts from coffee or tea |
| EP1338232A1 (en) * | 2002-02-19 | 2003-08-27 | Simatelex Manufactory Company Limited | Method of making coffee and coffee maker |
| US7024984B2 (en) | 2002-02-19 | 2006-04-11 | Simatelex Manufactory Co., Ltd. | Method of making coffee and coffee maker |
| EP1808110A1 (en) * | 2006-01-17 | 2007-07-18 | Wen-Ching Lee | Automatic filter tea/coffee maker |
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