Patent ID: 8844428
Filing Date: 2014-09-30
Classification: A47J

Abstract:
1. An extraction system for preparing a beverage from a cartridge using a fluid injected under pressure into the cartridge, comprising: a cartridge comprising a beverage delivery wall which can be perforated under the effect of the pressure of the fluid within the cartridge, a wall for injecting the fluid into the cartridge, and a nip region; and an extraction device configured to accept the cartridge and comprising an injection cage and a cartridge support, with the injection cage including fluid injection means, a base and a closure piston unit which is mounted so that it can move axially with respect to the base; and the cartridge support comprising perforating means for perforating the delivery wall of the cartridge under the effect of the pressure of the fluid in the cartridge, wherein the injection cage comprises an internal extraction cavity having a shape designed to at least partially accept the cartridge therein; wherein the injection cage and the cartridge support are arranged in such a way as to be movable relative to one another by a closure device which closes them around the cartridge prior to injection to trap the cartridge in the nip region, and the closure piston unit is movable relative to the base under the effect of pressure exerted by the fluid against the nip region of the cartridge in order to generate clamping forces that remain higher than separating forces exerted at the nip region and thereby prevent the injection cage and the cartridge support from opening up relative to one another as the system is pressurized; and wherein the cartridge is a separate component from the extraction device and is placed on the cartridge support for being enclosed by the closure device through the relative movement, with the cartridge including sealing means, made of deformable material, to which the clamping forces of the piston unit are applied.