Patent ID: 7451793

Claim:
A system ( 5 , 60 ) for connecting portions of chain ( 10 ) to the inner ring ( 3 ) of an anti-skid device wherein: said portions of chain ( 10 ) comprise chains with twisted links ( 11 ), each twisted link having two opposite portions disposed on two planes at 90° to each other, said connecting system ( 5 , 60 ) comprising: a U-bolt element ( 50 ) constrained to said inner ring ( 3 ), and an end link ( 60 ) defining an end of the portion of chain ( 10 ), characterized in that said end link ( 60 ) comprises a flat and straight portion ( 62 ) connected to said U-bolt element ( 50 ) and a twisted portion ( 61 ) connected to a twisted link ( 11 ) of the portion of chain ( 10 ), said twisted portion ( 61 ) being inclined by about 45° with respect to the plane on which said flat and straight portion ( 62 ) of the end link lies; and in that in that said twisted-link portion of chain comprises a plurality of said twisted links ( 11 ), each consisting of a substantially elliptical annular element which is twisted by bending the end parts thereof by 45° in one direction and in the opposite direction around the major axis thereof, so as to give rise to two portions disposed on two planes at 90° to one another.