US Patent 7878021 Simplified ice-cream maker

An ice-cream maker including a blade (30a) arranged in a double-walled container (20a), and a housing (1) containing a driving mechanism (10) that can generate a blade-rotating movement (30a) in relation to the double-walled container (20a), the double-walled container (20a) being composed of an external wall (23) and an internal wall (24) defining a housing (25) containing a phase changing mixture having a fusion range extending at least partially below 0° C. The inner wall (24) forms a vat (26), and the blade (301a; 30b′) is used to scrape the inner wall (24; 24′). The blade (30a) forms a spoon.