GERMAN ROAD TO STOP THE PENETRACTION OF EXTERNAL BODIES

摘要

The present invention refer to a twin wheel (1) to prevent the penetration of foreign bodies comprising a central body (2) comprising a pair of rollers (10) connected in a revolving manner to one another wherein each of the lateral walls (3,4) of the central body (2) has a protective annular element (6,7) overhanging transversely towards each roller (10), and that each inner side (11) of the rollers (10) has an annular recess (12) adapted to receive, by shape mating, said protective annular element (6,7).