Infusion device for infusion capsules and the like, particularly for espresso coffee machines and the like

摘要

An infusion device for infusion capsules, particularly for espresso coffee machines, comprising a filter basket holder cylinder and a piston which can move with respect to each other from a configuration for loading and unloading at least one capsule for infusions into or from the filter basket holder cylinder to a dispensing configuration and vice versa, the device comprising first elements for movement of at least one of the filter basket holder cylinder and the piston for their first relative movement from the loading and unloading configuration to an intermediate configuration that is comprised between the loading and unloading configuration and the dispensing configuration and vice versa, and second elements for moving at least one of the filter basket holder cylinder and the piston for a second relative movement thereof from the intermediate configuration to the dispensing configuration and vice versa.

主权项

1. An infusion device for infusion capsules and the like, particularly for espresso coffee machines and the like, comprising a filter basket holder cylinder and a piston which can move with respect to each other from a configuration for loading and unloading at least one capsule for infusions and the like into or from said filter basket holder cylinder to a dispensing configuration and vice versa, first means for movement of said piston for a first movement from said loading and unloading configuration to an intermediate configuration that is comprised between said loading and unloading configuration and said dispensing configuration and vice versa, and second means for moving said piston for a second movement thereof from said intermediate configuration to said dispensing configuration and vice versa, said piston being inserted slidingly in a piston supporting element, which is associated with a fixed frame and being kept in abutment position against an abutment surface of said piston supporting element by elastic means, wherein said second movement means comprise an expansion chamber, which is interposed between said piston and said abutment surface, said expansion chamber being able to be filled with a pusher fluid which is injected under pressure through at least one passage channel for the relative movement of said piston with respect to said piston supporting element in opposition to the action of said elastic means, wherein at least one receptacle of said at least one capsule, which is formed substantially by said filter basket holder cylinder and is open at a face of said filter basket holder cylinder that is directed toward said piston for the insertion and extraction of said at least one capsule in and from said at least one receptacle in said loading and unloading configuration, and wherein said filter basket holder cylinder is jointly and fixedly associated with a fixed frame and said piston can move with respect to said filter basket holder cylinder along a sliding direction which is substantially perpendicular to said open face of said at least one receptacle, and wherein said first movement means are actuated manually and comprise an actuation lever, which is associated rotatably with said fixed frame and can be gripped by the operator, said actuation lever being connected functionally to said piston supporting element by means of a lever system for providing said first movement and vice versa.