Beverage brewing apparatus
AssigneeToshiba Electric Appliances Co., Ltd.
InventorsHiromichi Shigenobu, Takao Nakabayashi, Kitio Akiyama, Masao Miida, Hisashi Karasawa
Life of this patent
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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.
Claims11
An apparatus for extracting a beverage solution by brew, comprising:
- a base,
- a stage attached to the base and having a stage surface with a brewing hole, the brewing hole being covered with a rigid sheet member having a number of perforations and substantially flush with the stage surface;
- an elongate filter tape capable of traveling over the stage surface of the stage and the sheet member;
- filter tape driving means for intermittently driving the filter tape by inches, thereby intermittently locating new parts of the filter tape on the stage surface and the sheet member;
- a hollow brewing cylinder disposed on the stage surface side of the stage and having an axis perpendicular to the stage surface, at least one end of the brewing cylinder nearer to the stage being open;
- brewing cylinder moving means adapted to move the brewing cylinder axially, thereby bringing the open end of the brewing cylinder into liquid-tight contact with the stage surface with the filter tape therebetween so that the open end surrounds the brewing hole, and separating the open end of the brewing cylinder at a predetermined distance from the stage surface;
- a pressurizing piston slidably disposed in the brewing cylinder and designed so that a brewing chamber is defined inside the brewing cylinder by the inner wall surface of the brewing cylinder, the pressurizing piston, and the filter tape when the open end of the brewing cylinder is in liquid-tight contact with the stage surface through the medium of the filter tape;
- piston moving means for axially moving the pressurizing piston in the brewing cyljnder;
- material powder supply means for feeding a predetermined quantity of material powder as material for the beverage solution into the brewing chamber defined inside the brewing cylinder;
- and
- hot-water supply means adapted to supply the brewing chamber with hot water pressurized to a predetermined pressure when the material powder is fed into the brewing chamber and pressurized by the pressurizing piston.
Dependencies are inferred from the claim text.