Abstract: In a chain drive, the wear of a chain having a plurality of links, each of which is provided with a pair of pivot pins parallel to each other and transversally spaced apart from each other and at least three strips parallel to one another and arranged side by side is controlled by means of a detection device adapted to detect the breakage of at least one of the strips and to emit a signal indicating to replace the chain itself.

Abstract: A supply system, fur supplying an internal combustion engine with air and fuel, is provided with a first fuel supply circuit, having at least one electro-injector controlled b an electronic unit, an intake conduit conveying combustion air, a throttle valve in the intake conduit, and a second fuel supply circuit, activated in the event of failure and having a nozzle that atomizes fuel due to a depression in the intake conduit; a fuel flow rate adjusting valve varies the flow rate exiting from the nozzle, under the operation of a mechanical transmission; according to the operation of the throttle valve.

Abstract: A vehicle braking member has a block of friction material cooperating in sliding manner with a respective member for braking, and supports a wear detector wherein a resistive element, consumed simultaneously with the block of friction material, has a first electric terminal set, in use, to a reference potential, and a single second electric terminal cooperating in sliding manner with the member for braking so as to be set to the same potential as the member for braking.