Patent ID: 7380578

Claim:
An anti-skid system for vehicle wheels, comprising: gripping elements available for contact with a tread of the wheel arranged at free ends of arms ( 21 , 22 ) connected to a central connecting body; a clamping element ( 15 ) apt to be fastened to a bolt of a rim of said wheel; and a constraining assembly able to establish a connection between said arms ( 21 , 22 ) and said clamping element ( 15 ), wherein said constraining assembly comprises: a collar ( 17 ), integral with said clamping element ( 15 ), a connecting rod ( 18 ), carrying a constraining bracket ( 38 ) and freely slidable through said collar ( 17 ), a threaded operating pin ( 16 ) extending from the clamping element ( 15 ) passing through said collar ( 17 ), and an operating knob ( 19 ) screwable on said threaded operating pin ( 16 ) of the clamping element ( 15 ) in opposition to said collar ( 17 ).