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US 5,473,973 AGranted
Percolator cup for espresso coffee machines
AssigneeEssegielle S.r.l.
InventorVirginio Cortese
Life of this patent
Estimating the term…
Abstract
A percolator cup for espresso coffee machines, wherein a cup-shaped casing defines a compartment for ground coffee, and an outlet separated from the compartment by a calibrated valve element which only connects the compartment to the outlet when the pressure inside the compartment exceeds a given value.
Claims16
A percolator cup for espresso coffee machines, comprising:
- a) a cup-shaped casing including first and second chambers;
- b) said casing including an outlet for communicating with the exterior;
- c) said second chamber communicating with said outlet;
- d) valve means positioned inside said second chamber and separating said first and second chambers;
- e) said valve means including means for selectively allowing said first chamber to communicate with said second chamber when the pressure inside said first chamber exceeds a threshold value;
- f) said casing including a seat for supporting said valve means and allowing communication between said first and second chambers;
- g) said valve means including a plate;
- and
- h) said valve means including thrust means for maintaining a peripheral portion of said plate in frontal contact with said seat at a preselected pressure.
6 more elements
Dependencies are inferred from the claim text.