A system for transmitting a signal indicating the functioning condition of a tire comprises a generator of electricity (B1) connected to a code generator (B3) and an oscillator (B4) capable of generating a right frequency for transmitting the coded signal;...

A device for surveying the radial deformation state of a tire comprises a sensor of the difference between the pressure of the gas inside the tire and the atmospheric pressure; an optical device for outside signalling operating when this difference in pres...

It is described an anti-sabotage and anti-theft device for tire inflating valves which is realised by a cap (10) with two main elements of Fig 7 at least, a member (15) with an internal thread and capable of screwing on the end of the valve (9) and the env...