EP0288899A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coffee making method and related coffee machine
Assignee: Individual
•
Filing: 1988-04-21
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Granted: —
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Expires: 2008-04-21
Abstract
Abstract To let the water pass quickly through the ground coffee layer at a temperature below 100°C, the water is heated to the desired temperature and is then vacuum drawn through the powdered coffee, the vacuum being generated by steam cooling and condensation. A coffee machine, consisting of an upper vessel (2) which can be tightly connected to a lower vessel (1) with the interposition of a coffee filter basket (4) is fitted with a rising transfer tube (9) extending from just above the bottom of the lower vessel (1) upwards to the upper vessel (2) and with a shut-off valve (13) which opens in direction of the upper vessel (2), while this upper vessel (2) is communicating by means of a siphon (19, 20) with the coffee filter basket (4) which, in turn, is at its lower end connected to the lower vessel (1) by means of a non-return valve (17, 18) that can be opened in direction of the lower vessel (1).
Inventors
- 👤 Valentino Ribi
- 👤 Guido Ribi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 10:11
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/04; A47J31/043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
22 words
Coffee making method, characterized by the fact that the hot water for coffee making is suction drawn through the powdered coffee layer.
Claim 2
Dependent Claim
22 words
Coffee making method, characterized by the fact that the hot water for coffee making is suction drawn through the powdered coffee layer.
Claim 3
Dependent Claim
50 words
Method as described in Claim 1, characterized by the fact that suction of the hot water through the powdered coffee layer is achieved by generating a vacuum in vessel (1) in which the beverage will be collected, communicating through this coffee layer with a vessel 2 containing the hot water.
Claim 4
Dependent Claim
36 words
Method as described in Claim 1 and 2, characterized by the fact that the vacuum in vessel (1) in which the final beverage is to be collected, is generated by steam condensing in this vessel (1).
Claim 5
Dependent Claim
47 words
Method as described in the Claims 1 thru 3 characterized by the fact that the vacuum generated in vessel (1) in which the final beverage is to be collected, is generated by ebullition and evaporation of water in this vessel (1) followed by steam cooling and condensation.
Claim 6
Dependent Claim
106 words
Method as described in the Claims 1 thru 4, characterized by the fact that the water to be passed through the powdered coffee layer is first brought to ebullition in vessel (1), called "main vessel" in which the final beverage will also be collected, and is then transferred, preferably by spouting caused by the steam pressure, from the lower or main vessel (1) into the upper or "auxiliary" vessel (2) from which it is siphoned back through the powdered coffee layer into the main lower vessel (1) through the effect of vacuum generated in the main vessel (1) due to cooling and condensing of residual steam.
Claim 7
Dependent Claim
100 words
Method as described in the claims 1 thru 4, characterized by the fact that a limited quantity of water is brought to boiling point in the first vessel (1) in which the final beverage will be collected; the steam from this boiling water being used to bubble heat the water contained in the upper vessel (2) which is to pass through the ground coffee layer, while the residual steam in the first vessel (1) is cooled down and condensed thus generating the vacuum necessary for aspiration of the heated water from the auxiliary vessel (2) through the powdered coffee layer.
Claim 8
Dependent Claim
35 words
Method as described in claim 1, characterized by the fact that the hot water required for coffee making, is passed twice through the powdered coffee layer, first under pressure and later by suction or vice-versa.
Claim 9
Dependent Claim
71 words
Method as described in claim 7, characterized by the fact that the water required for coffee making is brought to ebullition in a first vessel (1) and is than pressure spouted from the first vessel (1) through the powdered coffee layer, into an auxiliary vessel (2) from which it is once more vacuum drawn through the coffee layer into the lower vessel (1) due to cooling and condensing of residual steam.
Claim 10
Dependent Claim
106 words
Method as described in the claims 1 thru 4, characterized by the fact that part of the water needed to make coffee is brought to ebullition in a first vessel (1) and is then spouted under steam pressure from the first vessel (1) through the powdered coffee layer into an auxiliary vessel (2) containing the remaining water necessary for coffee making at a lower temperature, for instance ambient temperature; the water mixture thus obtained is siphoned back from vessel (2) into vessel (1) passing through the powdered coffee layer due to the vacuum generated in the first vessel (1) by cooling and condensing of residual steam.
Claim 11
Dependent Claim
168 words
Coffee machine for the application of the methods described in claims 1 thru 4, in particular in claim 5, characterized by the fact that this machine is consisting of a lower vessel (1), an upper vessel (2) and a coffee filter basket (4) in which the powdered coffee is packed, the upper vessel (2) being removable and connected by a tight gasket to the lower vessel (1), while a transfer riser (9) starting just above the bottom of the lower vessel (1) leads into the upper vessel (2), this transfer tube (9) being fitted with a shut-off valve (13, 14) which can be opened in direction of the flow towards the upper vessel (2), while the upper vessel (2) is communicating through a siphon (19, 20) with thee upper end of the coffee filter basket (4) the bottom of which is connected to the lower vessel (1) by means of a shut-off valve (17, 18) which opens in direction of the downward flow towards the lower vessel (1).
Claim 12
Dependent Claim
165 words
Coffee machine as described in claim 10, characterized by the fact that the transfer riser is consisting of a tube (9) incorporated in the coffee basket bottom and extending through a hole in the bottom of the upper vessel (2) to the upper portion of this vessel (2) where the tube (9) is provided with one or more - preferably lateral positioned - outlet openings, whereas the siphon is consisting of two radially spaced concentric tubes (19, 20) the innermost of which (19) is communicating through its lower end with the hole (10) in the bottom of the upper vessel (2) and is integral with this bottom, while extending upwards with a radial spacing around the transfer tube (9) and communicating at its upper end with the hollow space between the two tubes (19,20) of the siphone, the external tube (20) being mobile fitted on the upper end of the transfer tube (9), extending downwards until just above the bottom of the upper vessel (2).
Claim 13
Dependent Claim
99 words
Machine as described in the claims 10 and 11, characterized by the fact that the shut-off valve associated with the transfer tube (9) is consisting of a ball valve (13, 14) mounted on the transfer tube (9), whereas the shut-off valve associated with the coffee filter basket (4) is consisting of a circle of holes (16) machined in the bottom of the coffee filter basket and closed at its lower end by a flexible or elastic disk, centrally fixed to the transfer tube (9) and peripherally cooperating with a valve seat (18) located around the circle of holes (16).
Claim 14
Dependent Claim
41 words
Machine as described in claim 10, in particular for the implementation of the method described in claim 6, characterized by the fact that the transfer tube (9) end on the bottom of the upper vessel (2) or in its lower portion.
Claim 15
Dependent Claim
116 words
Coffee machine for the implementation of the method described in the claims 7 and 8, characterized by the fact that it includes a lower vessel (1), an upper vessel (2) and an intermediate coffee filter basket (4) in which the powdered coffee is packed, the lower vessel (2) being removable and connectable by means of a sealing gasket to the lower vessel (1), while the coffee filter basket (4) is connected to the upper vessel (2) by means of a siphon (19, 20) and is communicating with the lower vessel (1) by means of a priming tube extending from the bottom of the above basket (4) until just above the bottom of the lower vessel (1).
References Cited (Backward Citations)
No citation records indexed.
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