Patent ID: 9655470
Date: 2017-05-23
CPC Classifications: A47J

Claim:
1. An injection unit for a coffee machine of the espresso type, comprising: a fixed upper mechanical unit having a central projection forming a hot water distributor and to which is fixed a removable part known as a group head, an interior surface of the group head has a cavity below which there is a portafilter having an operating handle; a housing for accommodating a filter basket containing coffee grounds for the preparation of coffee of the espresso type; the portafilter mounted on the group head by collaboration of lugs in grooves during a pivoting movement; the filter basket bearing in a sealed manner against the central projection; a resilient suspension system which connects the group head to the fixed upper mechanical unit of the injection unit and which has a spring providing a restoring force opposing downward movement of the group head with respect to the fixed upper mechanical unit; and a seal surrounding the hot water distributor bears against the upper interior periphery of the filter basket thus sealing as the operating handle is pivoted.