US Patent 7647782 Frozen beverage and ice making machines

Apparatus (10) for converting liquid (60) in a container (50) to a semi-frozen slurry (61) or frozen ice particles, where a refrigerant (41) is contained within a refrigerant cavity (40) defined by two walls (20, 30), the flexing/deformation of at least one of the walls (20, 30) agitating the liquid (60) to assist the conversion thereof into the semi-frozen slurry (61) or ice particles.