Patent ID: 8820215

Claim:
A device for preparing a beverage from a food substance contained in a capsule by feeding a liquid into the capsule provided to the device, wherein the liquid is fed by an internal or external water supply, the device comprising: a housing comprising an extraction head having an aperture for inserting a capsule into a brewing chamber of the device, the brewing chamber is defined by an upper enclosing member and a lower enclosing member; a closing mechanism to selectively enclose the capsule by a relative displacement of the enclosing members, wherein the enclosing members are designed for moving between an open insertion position for inserting a capsule into the brewing chamber and a closed position for tightly enclosing the capsule within the brewing chamber, the closing mechanism comprises a knee lever comprising an upper rod and a lower rod connected to each other by a first axle, the closing mechanism further comprises a second axle extending through the upper rod and mounting the closing mechanism inside the extraction head, and a connection member integral with the second axle connects the closing mechanism to a handle exterior to the housing of the device; and adjustment means connected to at least one of the enclosing members for adjusting the relative position of the enclosing members and hence the closing force of the closing mechanism in the closed position.