Tyre for vehicle hired wheels provided with a tread pattern, and process for increasing the imprisonment of snow in the patterns of the tread for tyres of wheels of a vehicle hired

摘要

"Tyre wheels of vehicles provided with a tread pattern, and process for increasing the imprisonment of snow in the patterns of the tread for tyres of wheels of a vehicle hired.A pneumatic tyre particularly adapted to run on a road covered with snow has a tread (1) in the blocks (2, 3) of which a first and a second series of sipes (8)9) are formed, which are slanted in opposite directions respectively with respect to a direction normal (n) with the running surface (s) of the tread (1).The sipes (8)9) extend according to a curved in the direction of extension cu00f3ncava edges of grab of acute angle (10a) displayed by the respective flexible parts (10) bounded in blocks (2),3) by sipes themselves.Each block (2, 3) is peripherally confined by transverse grooves (5) and longitudinal grooves (4) having each a first side (11),14) normal with respect to the surface of the bearing (s) and a second side (12, 15) diverging from the first side in the direction of the surface of the bearing itself.