Abstract: A beverage extraction machine in which powdered material such as coffee is mixed with hot water in an extraction chamber which is mounted over a beverage receiver with a filter mounted between them. High pressure air is supplied into the beverage receiver and passes up through the filter to agitate the hot water and powdered material in the extraction chamber. Then air is sucked from the beverage receiver and drums the brewed coffee from the extraction chamber through the filter into the beverage receiver where it is discharged to a cup. A pressure sensor can be used to control the application of the high and low pressure air.

Abstract: A hot water supplying device is provided with a hot water supplying tank which includes first and second tank chambers. Warm water of about 85.degree. C. is stored in the first tank chamber and hot water, which is higher in temperature than the warm water in the first tank chamber, is stored in the second tank chamber. The warm water in the first tank chamber is supplied to a coffee liquid making or percolating means by a pressure pump through a guide pipe. The guide pipe is introduced, on the way, into the hot water in the second tank chamber, whereby the warm water pressure fed from the first tank chamber through the guide pipe can be further heated by the heat of the hot water in the second tank chamber, and supplied to the coffee liquid making or percolating means.

Abstract: A beverage brewing apparatus according to the present invention is provided with a brewing cylinder. A pressurizing piston is slidably fitted in the brewing cylinder. The pressurizing piston, in conjunction with a coffee filter tape, defines a brewing chamber inside the brewing cylinder. The pressurizing piston compresses coffee powder fed into the brewing chamber. When the powder is pressurized by the pressurizing piston in the brewing chamber, extremely hot pressurized hot water is poured into the brewing chamber by a hot-water supply mechanism. As a result, a coffee solution percolated in the brewing chamber runs out therefrom through the filter tape.