| 摘要 |
A stud for a rubber tyre for a vehicle is described comprising a cylinder-formed capsule (1) in which a spring-loaded, movable core (3) is mounted that has a flange (3B) at the lower end which abuts against a corresponding edge (IB) internally in the capsule (1) when the core (3) is forced outwards in the capsule (1) by a preloaded compression spring (4) which lies inside a hollow space (7) in the lower part (IA) of the capsule (1). The flange (3B) is equipped with at least one slit opening (3C) designed to let through air from the hollow space (7) and to a hollow space (6) that is formed on the other side of the flange (3B) when the core (3) is forced into the capsule (1), and that a counter pressure is created in the capsule (1) which works against the force of the compression spring (4) and which is arranged to provide an inertia against the core (3) being forced out, as said counter-pressure contributes to the core (3), when driving on ice or snow, having a constant protrusion outside the surface (A) of the rubber tyre, but, when driving on harder surfaces such as asphalt or concrete, is automatically forced into the capsule (1) and remains approximately stationary as long as the vehicle is in motion. |
