Patent ID: 6763759
Filing Date: 2004-07-20
Classification: A47J

Abstract:
An apparatus for preparing a beverage from a capsule containing the product to be extracted, the apparatus having a water injecting device (3) including an injection head (18) connected to a water supply conduit (9) and a hydraulic system for displacing the injection head towards a capsule-holder (4) positioned beneath the injection head, the hydraulic system being connected to a piston water conduit (11) interconnected to a pump (5), which also feeds the injection head, characterised in that the water injecting device (3) includes a body (20) and a piston (19) provided with an annular seal enclosing water-tightly a space (22), the piston (19) and the seal (21) having a shape and a size such that the piston may assume a slanted position in the body (20), to cause a breakdown of the water-tightness and a loss of pressure in the hydraulic system.