Infusion Unit For A Coffee Machine

摘要

The infusion unit (1) for a coffee machine, comprising a closing piston (3), an infusion cylinder (2), an ejection piston (5) for ejecting the load of spent coffee (30), said piston (5) sliding inside the infusion cylinder (2) in the direction of the axis of the infusion cylinder (2) between a retracted position and an extended position for ejection of the load of spent coffee (30), and operating means for the ejection piston (5), comprising an oscillating rocker (32) having a first arm (33) provided with a member for driving the ejection piston (5) and a second arm (35) provided with a member for engaging the oscillating movement of the rocker (32) selectively from a first control cam (37) configured and arranged in such a manner as to generate an oscillation of the rocker (32) in the direction corresponding to the driving towards the extended position of the ejection piston (5), or with a second control cam (38) configured and arranged in such a manner as to generate an oscillation of the rocker (32) in the direction corresponding to the driving towards the retracted position of the ejection piston (5).

主权项

1. An infusion unit for a coffee machine, comprising:
a closing piston; an infusion cylinder subjectable to reversible rotational-translational travel between a position for loading a load of coffee, in which the infusion cylinder is disengaged from the closing piston and has the axis inclined relative to the axis of the closing piston, and an infusion position in which the infusion cylinder is engaged with the closing piston and has the axis in the direction of the axis of the closing piston; a piston for ejecting the load of spent coffee, said piston sliding inside the infusion cylinder in the direction of the axis of the infusion cylinder between a retracted position and an extended position for ejection of the load spent coffee; and operating means for the ejection piston, wherein said operating means comprises an oscillating rocker having a first arm provided with a driving member for the ejection piston and a second arm provided with an engaging member for oscillating movement of the rocker selectively from a first control cam configured and arranged in such a manner as to generate an oscillation of the rocker in the direction corresponding to the driving towards the extended position of the ejection piston, or with a second control cam configured and arranged in such a manner as to generate an oscillation of the rocker in the direction corresponding to the driving towards the retracted position of the ejection piston.