Coffee maker for brewing coffee powder contained in a cartridge
First Claim
Patent Images
1. Coffee maker for brewing coffee powder contained in a cartridge, comprising:
- a single brewing chamber adapted to receive said coffee powder cartridge;
at least one means for punching said coffee powder cartridge;
a pump for feeding hot brewing water through a single brewing water conduit into said brewing chamber, wherein said pump is operated with alternating current;
means for restricting the amount of brewing water fed into said brewing chamber per unit of time to such an extent that the brewing water flows through said powder coffee cartridge received in said brewing chamber essentially unpressurized, said means for restricting including an adjustable throttle valve inserted into said brewing water conduit for varying the effective cross sectional flow area of said conduit, wherein said means for restricting the amount of brewing water fed into said brewing chamber per unit of time comprises means for restricting a flow rate of said pump, and wherein said means for restricting the flow rate of said pump comprises a phase controlled modulator, a wave packet controller or a controller for changing the frequency; and
a control unit operationally connected to said pump and said means for restricting to selectively activate said pump and said means for restricting, in a first state to direct pressurized water into said brewing chamber sufficient for preparing an espresso beverage and in a second state to direct essentially unpressurized water into said brewing chamber sufficient for preparing a frothless beverage.
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Accused Products
Abstract
The coffee maker for brewing powder coffee contained in a cartridge comprises a brewing chamber adapted to receive the cartridge, at least one punching member for punching the cartridge and a pump for feeding brewing water into the brewing chamber. In order to avoid that the prepared coffee shows froth at its surface, the coffee maker comprises means for restricting the amount of water fed by the pump into the brewing chamber per unit of time. This means ensures that the brewing water flows through the cartridge essentially unpressurized.
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Citations
11 Claims
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1. Coffee maker for brewing coffee powder contained in a cartridge, comprising:
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a single brewing chamber adapted to receive said coffee powder cartridge; at least one means for punching said coffee powder cartridge; a pump for feeding hot brewing water through a single brewing water conduit into said brewing chamber, wherein said pump is operated with alternating current; means for restricting the amount of brewing water fed into said brewing chamber per unit of time to such an extent that the brewing water flows through said powder coffee cartridge received in said brewing chamber essentially unpressurized, said means for restricting including an adjustable throttle valve inserted into said brewing water conduit for varying the effective cross sectional flow area of said conduit, wherein said means for restricting the amount of brewing water fed into said brewing chamber per unit of time comprises means for restricting a flow rate of said pump, and wherein said means for restricting the flow rate of said pump comprises a phase controlled modulator, a wave packet controller or a controller for changing the frequency; and a control unit operationally connected to said pump and said means for restricting to selectively activate said pump and said means for restricting, in a first state to direct pressurized water into said brewing chamber sufficient for preparing an espresso beverage and in a second state to direct essentially unpressurized water into said brewing chamber sufficient for preparing a frothless beverage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification