Patent ID: 9247844
Filing Date: 2016-02-02
CPC Classification: A47J

Claim Text:
1. An infusion unit for production of hot beverages by extraction of a product charged into an infusion chamber using pressurized hot water, comprising said infusion chamber, wherein said infusion chamber comprises: a yielding wall configured to take a position by adjusting a volume of the infusion chamber according to an amount of product contained in said infusion chamber when the infusion chamber is closed; a variable volume chamber filled with a liquid and connected to said yielding wall, so that a volume of the variable volume chamber filled with the liquid varies according to the position taken by said yielding wall when the infusion chamber is closed; and a closing member configured to prevent liquid flow from and in said variable volume chamber filled with the liquid when the position of the yielding wall is locked, the position of the yielding wall being locked when the infusion chamber is closed, wherein said variable volume chamber filled with the liquid is in fluid communication with a flow passage from which said liquid can exit from said variable volume chamber, said closing member being provided on said flow passage, and wherein said variable volume chamber filled with the liquid is in fluid communication through said flow passage with a collection container, wherein said collection container allows storing a larger or smaller amount of liquid according to the volume of the variable volume chamber filled with the liquid when the infusion chamber is closed.