Device for injecting water into an apparatus for preparing a beverage from a capsule
AssigneeMonodor S.A.
InventorJean-Paul Denisart
Life of this patent
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Abstract
The invention concerns an apparatus for preparing a beverage from a capsule containing the product to be extracted comprising 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 via a locking control valve (12) to a pump (2), which also feeds the injection head.
Claims10
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.
An apparatus according to one of the preceding claims, characterised in that the water supply conduit (9) is connected to a discharge conduit (16) via a discharge valve (17), to enable a release of the pressure in the injection head at the end of the beverage extraction cycle.
An apparatus according to one of the preceding claims, characterised in that a locking control valve (12), arranged between the hydraulic system and the pump, includes a position in which the piston water conduit (11) is connected to a return conduit (13) for enabling a loss of pressure and discharge of water in the hydraulic system.
An apparatus according to one of the preceding claims, characterised in that the injection head (18) includes a plurality of perforating and injecting spikes distributed over a lower surface, for injecting water into the capsule, in the manner of a shower head.
An apparatus according to one of the preceding claims, characterised in that the injection head has the general shape of a disk with a diameter such that it can be mounted slidably in the body (20) of the hydraulic system, to abut against the piston (19).
An apparatus according to one of the preceding claims, characterised in that the radial clearance between the injection head (18) and the body (20) is such that the injection head can assume a slanted position, at an angle which is sufficient to cause a breakdown of the water-tightness of the piston (19) abutting against the injection head.
An apparatus according to one of the three preceding claims, characterised in that the plate of the injection head is provided with a passage (54) extending between a connector part (55) for connecting the supply conduit (9) and with a space (53) above a plate (51) provided with multiple perforating and injecting spikes (24).
An apparatus according to one of the preceding claims, characterised in that the injection head (18) includes attachment means (47) to which are attached return springs, which are fastened at their other end to a support frame of the water injecting device, for returning the piston (19) and the injection head (18) to their standby position.
Dependencies are inferred from the claim text.