A - Human Necessities – 47 – J
Patent
A - Human Necessities
47
J
A47J 31/46 (2006.01) A47J 31/24 (2006.01)
Patent
CA 2533476
Improvements to the coffee output of domestic espresso coffee machines, comprising a pump which impels pressurised hot water so that it passes though a dose of ground coffee (or a single-dose pod) deposited in a filter (1) which is accommodated in a housing (2), which in turn is fitted in a filter holder (3) which is provided with one or more outlet pipes (4) for the infusion of coffee produced. In the centre of the base of the housing (2), there is secured a ball (6) valve (5) which is fitted against a helical compression spring (7) such that the ball (6) and spring (7) are thrust in a chamber (11) of the valve (5). By means of respective upper (9) and lower (10) apertures, this chamber (11) communicates with the interior of the said housing (2) and with the cavity in the said filter holder (3). The ball (6) is installed between the lower side of the upper aperture (9) and the upper end of the spring (7). The spring (7) is installed between the ball (6) and a lower aperture (10) which has a conical shape which narrows in the downward direction and is obtained by pressure forming.
Robic
S.a. Celaya Emparanza Y. Galdos Internacional
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