Foods and beverages: apparatus – Beverage – Infusors
Patent
1997-04-10
1999-02-09
Alexander, Reginald L.
Foods and beverages: apparatus
Beverage
Infusors
99286, 99289R, 99308, A47J 3100
Patent
active
058680624
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a coffee liquid extracting apparatus.
There are two methods for obtaining ice coffee. One method is to first extract hot coffee liquid using high temperature water and then to cool the extracted coffee liquid. Another method is to extract coffee liquid by the use of ambient temperature water, such as unheated, or ordinary tap temperature water, from the beginning, and then to cool the extracted coffee liquid to a low temperature.
However, in the above former method, wherein coffee liquid is extracted by the use of high temperature water, cooling to a low temperature requires a large amount of cooling and thus consumes a lot of ice in order to change the coffee liquid extracted by high temperature water into ice coffee. In actual practice, such a large amount of cooling requires ice making machinery.
As opposed to and as compared with the former method, the latter tap temperature water method can reduce an extracted quantity of such components as astringency, caffeine, sundry taste and the like that deteriorate the taste of coffee liquid. Further, the latter method includes the merit of decreasing oil content which causes oxidation of coffee liquid. However, the problem of the latter method is that a long time for extraction is required. For instance, in existing methods, about one night, namely at least 5 to 8 hours, is required to extract coffee liquid by the use of tap temperature water.
SUMMARY OF THE INVENTION
In order to overcome the drawbacks of the prior art, the present invention provides a coffee liquid extracting apparatus that effects tap temperature water extraction of coffee liquid in a short time with little content of oil, astringency, caffeine, and sundry taste, and with little oxidation tendency, while providing a good taste and a favorable amber color.
Also, the present invention provides a coffee liquid extracting apparatus that favorably performs tap temperature water extraction of coffee liquid, and at the same time, can selectively perform high temperature water extraction of coffee liquid.
To achieve the above objects, the coffee liquid extracting apparatus of the present invention comprises an extractor for dripping coffee liquid from ground coffee; a combined-use decanter disconnectably disposed under the extractor for storing liquid, such as water for extraction use, and receiving the coffee liquid dripping from the extractor; a circulation path and a circulation pump for drawing out the liquid inside the decanter from its bottom, transporting it to an upper part of the extractor, and pouring it into the extractor; a circulating water heater installed in the circulation path; and a controller for controlling the circulating water heater and the circulation pump; wherein the controller, in response to actuation of a tap temperature water extraction switch, drives the circulation pump to circulate coffee liquid for a fixed time (T.sub.1), and at the same time, by turning on the circulating water heater for a fixed time (T.sub.0), limited to an early operation period, drives highly heated water into the extractor for the fixed time (T.sub.0), and then, drives unheated water into the extractor. The above embodiment addresses the first feature of the coffee liquid extracting apparatus of the present invention.
The coffee liquid extracting apparatus of the present invention includes a second feature providing a coffee liquid extracting apparatus that comprises an extractor for dripping coffee liquid; a combined-use decanter, disconnectably disposed under the extractor, for storing water for extraction use and receiving the coffee liquid dripping from the extractor; a circulation path and a circulation pump for drawing out the liquid inside the decanter from a bottom thereof, transporting the liquid to an upper part of the extractor, and pouring it into the extractor; a circulating water heater installed in the circulation path; a controller for effecting a tap temperature water extraction operation for making ice coffee an
REFERENCES:
patent: 3696733 (1972-10-01), Beverett
patent: 4532142 (1985-07-01), Dean
patent: 4825759 (1989-05-01), Grome et al.
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