Abstract: A coupling for valve assemblies, for tubeless tires, includes an enclosure arranged to cover a rigid rim of a vehicle, to delimit a substantially tubular compartment, filled with gas under pressure. The coupling has a first element and a second element crossed respectively by a first through channel, threaded internally, and by a second through channel. The second element cooperates with a valve for the selective closure of the second channel. The first element rests on an internal surface of the rim, which can be activated following its hermetic insertion, from the inside of the compartment. The second element rests on an external surface of the rim, which can be activated following the hermetic screwing, from the outside of the compartment, of a threaded stem of the second element in the first channel, with consequent alignment between the channels to connect the compartment to the outside.

Abstract: A carbon-dioxide pump for tires which comprises a dispensing head which is provided with a nosepiece for coupling to the tire valve which is connected to a threaded hole for the hermetic fixing of a bottle of carbon dioxide and to a sliding hole for a needle-equipped pin for piercing the membrane of the bottle which is rigidly coupled to a flow control element of the frustum-shaped type which can be actuated manually so as to rotate in order to hermetically close the bottle after piercing the membrane, a shell for containing the bottle which is screwed hermetically onto the head and on which a handgrip is slidingly fitted with the interposition of guiding and sliding sealing elements which are suitable to provide a short manual pump in which the air compressed by the movement of the handgrip flows between the shell and the bottle and is fed to the nosepiece through a nozzle which is closed by a valve system provided in the head.