Patent ID: 7389954

Claim:
A food grinding machine, comprising: a static outer jacket including a peripheral wall enclosing an inner space, and being coupleable to a loading inlet of the grinding machine; a plurality of successive annular recesses being formed in said peripheral wall, said recesses having preset volumes and being separated one from the other; a food pusher and cutter element being mounted in said inner space for rotation coaxial to said jacket for advancing food along a food processing path; a plurality of screening means defining differentiated screening passage regions, each of which is formed by sets of through holes provided in sequence along the food processing path for screening processed food, said screening means being interposed between said pusher and cutter element and said jacket and arranged with each one of said sets of through holes in a corresponding relationship with a respective one of said recesses;—a plurality of collar elements, each of which is located between two consecutive sets of holes forming said screening regions, and connects two consecutive screening means; and a plurality of free passage means for allowing free passage of the processed food from a screen passage region to a subsequent screen passage region, said free passage means being constituted by through slots, provided at said collar elements and having such a holed surface so as to allow free, non-screening passage of the food processed from one side of the screening means to the opposite side; wherein said food processing path includes said plurality of successive recesses, said through slots forming said free passage means, and said plurality of screening means through each of which the processed food is advanced by said pusher and cutter element by being inserted through a said screening means into, and subsequently extracted through a said free passage means out of a said recess and further inserted through a subsequent said screening means into a subsequent said recess.