TYRE TYPE DEVICE FOR VEHICLE

The present invention relates to a tyre type device, intended to equip a vehicle, with improved flattening of the tread thereof compared with a conventional tyre. The tyre type device (1) comprises a radially outer structure of revolution (2), which is intended to come into contact with the ground, a radially inner structure of revolution (3), which is coaxial with the radially outer structure of revolution and is intended to provide the connection to a mounting means (4), an inner annular space (5) which is radially delimited by the two structures of revolution and has a mean radial height H, and a bearing structure (6) which at least partially connects the two structures of revolution and is made up of a plurality of bearing elements (7) that are independent in pairs and are made to buckle under compression in the contact patch (A) in contact with the ground. According to the invention, the smallest characteristic dimension E of the section S of any bearing element (7) is at most equal to 0.02 times the mean radial height H of the inner annular space (5), the bearing elements (7) have an initial length LP strictly greater than the mean radial height H and at most equal to 1.1 times the mean radial height H, and the surface density D of the bearing elements (7) per unit area of the radially outer structure of revolution, expressed in 1/m2, is at least equal to Z/(A*∑Fr/n), wherein Z is the nominal radial load, expressed in N, A is the area of contact with the ground, expressed in m2, and ∑Fr/n is the mean force at break under tension of the n bearing elements (71) made to buckle under compression, expressed in N, and the tyre type device comprises two sidewalls (8), which are not linked to the bearing structure (6) and close the inner annular space (5), forming a closed cavity that can be pressurized. La présente invention concerne un dispositif de type pneumatique, destiné à équiper un véhicule, avec une mise à plat améliorée de sa bande de roulement par rapport à un pneumatique classique. Le dispositif de type pneumatique (1) comprend une structure de révolution radialement extérieure(2), destinée à entrer en contact avec un sol, une structure de révolution radialement intérieure(3), coaxiale à la structure de révolution radialement extérieure et destinée à assurer la liaison avec un moyen de montage (4), un espace annulaire intérieur (5) radialement délimité par les deux structures de révolution et ayant une hauteur radiale moyenne H,et une structure p