Patent ID: 8919241

Claim:
A brewing chamber comprising: a housing having inlet and outlet end and a channel extending between the inlet and outlet ends; the channel defining an inner surface of the housing extending from the inlet end to the outlet end and configured to direct liquid to the outlet end; a cartridge penetrating extraction member extending into the channel from the inner surface, the cartridge penetrating extraction member having an open penetrating end for penetrating a cartridge and a closed anchoring end abutting the inner surface of the housing intermediate the inlet and outlet ends and above the outlet end of the housing; the cartridge penetrating extraction member further having a substantially tubular member extending between the open penetrating end and the closed anchoring end for guiding liquid from the open penetrating end directly onto the inner surface of the housing above the outlet end of the housing; the tubular member having a chase or other guide means extending along the tubular member from the open penetrating end to a point intermediate the open penetrating end and the closed anchoring end, wherein the substantially tubular member of the cartridge penetrating extraction member is substantially cylindrical and extends between the open penetrating end and the closed anchoring end of the cartridge penetrating extraction and the guide means has at least one longitudinal groove on the surface of the substantially tubular member; the at least one longitudinal groove extending from the open penetrating end towards the closed anchoring end.