Abstract: A centrifuge for alimentary uses of the kind provided with a central feeding duct, includes a pestle to be introduced in the feeding duct, provided at one end with a plurality of sharp and small projected elements adapted to engage the material to be treated as well as with a longitudinal groove on its outer surface. A pin which is connected to the feeding duct extends into the groove for allowing the pestle to slide in the feeding duct, while preventing any rotation thereof produced by the material being entrained by a rotating grater and delimiting the insertion of the pestle to a position in which the end thereof is located near the grater. Moreover, a projecting cutting element is provided on the head of the screw fixing the grater to a motor shaft, so as to effect the crumbling of the material located at the central part of the grater.

Abstract: A machine for extracting juice from citrus fruit, in particular oranges, includes an inclined chute conveying the fruits to be squeezed against a step, a spoon that raises the fruit resting on the step, and two squeezing plates below the step. The plates include a front plate and a back plate, the front plate being pivoted at its upper part and urged by a spring toward the back plate. The back plate is connected to a connecting rod and crank driven by a speed reducer by which the back plate is slid longitudinally horizontally toward and away from the front plate. As the two plates converge, the fruit interposed therebetween is squeezed by the back plate. Juice thus extracted from the fruit drips into an underlying hopper and from there is collected in a container. Afterwards, as the back plate moves away from the front plate, the residue of the previously squeezed fuit falls down on an inclined grill disposed over the hopper and is collected in a collecting drawer.