A self-healing pneumatic tire, which uses the sealant stored in the tire to fix a leak, is disclosed.

A valve for air chambers includes a fixed body and a mobile selector body, wherein the mobile selector body is disposed coaxially in the fixed body. The mobile selector body is configured to slide with respect to the fixed body. The mobile selector body has a first position of use, associated during use to at least a first outlet, and a second position of use, associated during use to at least a second outlet.

A multi air chamber tire 1 includes a partition wall 30 configured to define and form a plurality of air chambers 20 disposed adjacent to each other in an inner cavity of a tire, and a ventilation member 10 provided to the partition wall 30, and configured to connect the plurality of air chambers 20 in a state where ventilation is allowed. The ventilation member 10 allows ventilation between the plurality of air chambers 20 when a predetermined condition is satisfied indicating that fluid is being injected into at least one of the plurality of air chambers 20 from outside of the tire, and the ventilation member 10 shuts off the ventilation between the plurality of air chambers 20 when the predetermined condition is not satisfied.

Tire assemblies are disclosed. In one embodiment a tire insert assembly includes an elastomeric tire insert constructed to be received within a tire, the tire having sidewalls and a tread portion. An upper crown surface of the tire insert and a lower surface of the tire define an outer chamber and the tire insert defines an inner chamber. The tire insert may be configured to support a substantial portion of the sidewall of the tire when the inner chamber is inflated.

A wheel provided with a tyre in tyre installation in which an outer ground engaging tyre is mounted on a rim of the wheel and an inner inflatable member is mounted on the rim inside the outer tyre. The inner surface of the outer tyre and the outer surface of the inner inflatable member are provided with respective electrically conductive members suitably in the form of induction loops. A controller determines when the respective electrically conductive members come into close proximity or contact, enabling manual or automated adjustment of air pressure to minimise abrasion between the outer tyre and inner inflatable member.

A wheel assembly has a rim with an outer radial surface. A tire coupled to the rim defines a first interior region between the outer radial surface and the tire. A bladder coupled to the rim defines a second interior region between the outer radial surface and the bladder. A third interior region is defined between the bladder and the tire. The wheel assembly includes a valve fluidly coupled to the second interior region and the third interior region. The valve is movable between a first position and a second position. The second interior region and the third interior region are fluidly isolated from one another when the valve is in the first position. The second interior region and the third interior region may be fluidly coupled to one another when the valve is in the second position.

A fore-aft self-balancing personal transportation device having a single wheel structure with multiple air chambers and air pressure equalization between the air chambers. Embodiments include dual tires on a single rim structure, or a single tire structure with multiple lobes, etc. Air passage between the air chambers may be internal through the rim or external via an air hose or related structure. The air chambers may be tubed or tubeless. Several different embodiments are disclosed.

The invention relates to a valve for a compartmentalized tube or tyre, including a number of ducts for passing and increased sealing. It therefore has one end for coupling to an inflation/deflation system; another end in contact with the rim; a flow channel between both, with opening by means of a cover solidly joined to a mobile rod. The valve has at least two cavities with connection means to the airtight compartments of the tube or tyre. One cavity is displaced solidly joined to the rod, allowing gas or liquid flow through the communication channel between the cavities when in the open position. The existence of friction surfaces are thereby eliminated, increasing the sealing, the maximum operating pressure and the useful life. Additionally, the number of items in contact with one another are reduced, allowing for a simpler manufacturing process by reducing the level of accuracy required for the components.

The present application relates to a tire (6) comprising: a tread portion (8) and side walls (10), said tread portion (8) and side walls (10) defining a main air chamber (12); at least two auxiliary chambers (14, 16, 18) formed in the tread portion (8); and an air transfer device (28) for transferring air between the main air chamber (12) and each of the auxiliary air chambers (14, 16, 18).

Tire assembly for a bicycle rim, including a wheel tire with a tread surface and two tire beads, an inner tire disposed within the wheel tire, a tube disposed within the inner tire, and a valve arrangement for filling the tube and an intermediate space between the rim and the wheel tire with different air pressures. The inner tire in the filled and mounted condition bears on the tire beads of the wheel tire and presses the beads against the rim. The inner tire has a first through opening which in the mounted condition communicates with the intermediate space, and an insert part disposed between the rim and the tube and between the tube and the inner tire. The insert part forms an air duct between the rim and the tube and between the tube and the inner tire up to the through opening in the inner tire.