Beverage extraction apparatus

Details Beverage extraction apparatus Beverage extraction apparatus

1998-12-15

2000-06-27

Alexander, Reginald L.

Foods and beverages: apparatus

Beverage

Infusors

99287, 99280, A47J 3132

Patent

active

060793171

ABSTRACT:
A diffuser is provided on a beverage supply tube having a beverage supply valve. Air bubbles formed in the beverage in the final stage of filtration for extraction are removed from the beverage, and only the gas is passed through the beverage supply tube, whereby the tube is air-blown. Thereafter, the beverage remaining in the diffuser is drained through a drain tube. A pair of electrodes are provided on the beverage supply tube which leads the extracted beverage to the serving cup portion, in order to detect the presence and absence of the beverage based on the conduction caused by the beverage between the electrodes. An air pipe for supplying air to the extraction chamber from an air pump is provided with a branch, and a pressure sensor for detecting the pressure within the extraction chamber during the filtration is attached to the branch. The on/off duty ratio of the air pump is controlled based on a pressure signal from the pressure sensor, so as to control the pressure within the extraction chamber below a predetermined pressure.

REFERENCES:
patent: 5127317 (1992-07-01), Takayanagi et al.
patent: 5937738 (1999-08-01), Okamura et al.
Patent Abstracts of Japan, vol. 98, No. 10, Aug. 31, 1998.
Patent Abstracts of Japan, vol. 18, No. 204 (C-1189), Apr. 11, 1994.
Patent Abstracts of Japan, vol. 16, No. 514 (P-1442), Oct. 22, 1992.

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