Patent ID: 7694624

Claim:
A brewing head of a coffee machine, comprising: (a) a rotate to lock assembly, which comprises a handle having two ends, wherein each end of the handle is movably joined to one end of a rotate plate, a rotate rod and a top frame by a fixed pin; wherein one member of a back connection plate is fixedly attached to each side of the top frame and the other member of the back connection plate is movably joined to a support base; wherein the top end of a front connection plate is moveably joined to the other end of the rotate plate, and the lower end of the front connection plate is moveably joined to the support base; (b) a filter holder assembly, which comprises a filter, a filter handle, a filter holder and a coffee chamber; wherein the filter contains a flange; and (c) a sealing assembly, which comprises a seal ring, inserted between a water connection plate and a water spreader; wherein a water outlet valve, a water outlet spring, the seal ring, the water spreader are fixedly attached to the water connection plate by a water outlet valve holder; wherein the water connection plate is fixedly attached to the top frame; wherein the water connection plate contains an opening for connecting the water connection plate to a hose for delivering heated and/or pressurized fluid from a boiler, in the closed position, the handle is rotated downward to move the front connection plate to a vertical position; wherein the seal ring forms a pressure- and/or water-tight seal with the flange of the filter; wherein the rotate-to-lock assembly, the filter holder assembly and the sealing assembly are operatively linked to sustain pressure, advantageously up to at least twenty bars.