초록 ▼

Apparatus for obtaining strong aromatic coffee having a scalding chamber within a cylinder for receiving coffee powder between separately controlled upper and lower pistons, a hydraulic piston for causing the upper piston to close the scalding chamber, a passage for introducing hot water into the cl

Apparatus for obtaining strong aromatic coffee having a scalding chamber within a cylinder for receiving coffee powder between separately controlled upper and lower pistons, a hydraulic piston for causing the upper piston to close the scalding chamber, a passage for introducing hot water into the closed chamber through the upper piston so as to cause the coffee powder to swell-up, a separate hydraulic piston for causing the lower piston to compress the swollen coffee, and a passage for draining off the coffee so formed through the lower piston.

대표청구항 ▼

A coffee machine comprising: upper and lower pressure pistons arranged to move independently in opposite directions within a cylinder, said cylinder being open at both ends so that said upper piston and said lower piston are freely removable out of engagement with said cylinder; two carrier plates m

A coffee machine comprising: upper and lower pressure pistons arranged to move independently in opposite directions within a cylinder, said cylinder being open at both ends so that said upper piston and said lower piston are freely removable out of engagement with said cylinder; two carrier plates mounted on vertical rods one above the other in spaced relation; a scalding chamber for receiving loose coffee powder, said scalding chamber comprising said cylinder and said lower piston within said cylinder, and said cylinder being embedded in one of said carrier plates; hydraulic means carried by the other of said carrier plates for actuating said pressure pistons independently of each other between a ready position and a working position, said upper piston in its ready position being slidable into said cylinder to close said scalding chamber and said lower piston in its ready position being slidably further into said cylinder to compress said coffee powder; and, a hot water conduit leading to said closed scalding chamber and a coffee outflow conduit leading from said closed scalding chamber.