Patent classifications
B60C2009/2019
Hooping reinforcement for a tire of a heavy duty civil engineering vehicle
A hooping reinforcement of a tire for a heavy duty civil engineering type vehicle is disclosed. The crown reinforcement (3) of the tire (1), radially on the inside of a tread (2), comprises a protective reinforcement (6), a working reinforcement (5) and a hooping reinforcement (7). Said hooping reinforcement (7) has an axial width at most equal to the smallest axial width (L61, L62) of the two working layers (61, 62), and comprises at least two hooping layers (71, 72) that are formed from strips each made up of elastic metal reinforcers. Each hooping layer (71, 72) is made up of an axial juxtaposition of contiguous turns of the strip (8), which are circumferentially wound around the working layer (51). Each strip (8) is at least 35 mm and at most 250 mm thick, and its distributed breaking tension is at least equal to 100 daN/mm.
Crown reinforcement for a tire of a tractor-type agricultural vehicle
A tire (1) for an agricultural vehicle comprises a working reinforcement (2), radially on the inside of a tread (3) and radially on the outside of a carcass reinforcement (4), the working reinforcement (2) comprising a multilayer component made up of a radial stack of at least two working layers (21, 22), and aims to improve the endurance thereof. The working reinforcement (2) is made up of a circumferential spiral winding of at least one turn of the multilayer component, the first and second circumferential ends (211, 221; 212, 222) of each working layer (21, 22) are circumferentially offset from one another, and the respective first circumferential ends (211, 221) of two consecutive working layers (21, 22) are likewise circumferentially offset from one another.
PNEUMATIC TIRE
A pneumatic tire is provided. A carcass layer includes carcass cords formed of organic fiber cords obtained by intertwining a filament bundle of organic fibers, and includes turn-up portions formed by turning up end portions of a pair of bead portions to an outer side in a tire width direction. The carcass cords have an elongation at break (EB) satisfying EB≥15%. A portion of a belt layer located in a width range of 10% of a width of a second widest belt in the belt layer on each of a left side and a right side of a tire equator line in a tire width direction has a belt angle (θc) satisfying 0.349 rad≤θc≤0.56 rad. The elongation at break (EB) of the carcass cords and the belt angle (θc) satisfy 800<1140×θc+20×EB<1400.
HEAVY-DUTY TIRE
A heavy-duty tire comprises a tread reinforcing belt comprising first to fourth belt plies each composed of belt cords inclined with respect to the tire equatorial plane. The first radial distance L1 between the belt cords of the third belt ply and the belt cords of the fourth belt ply is not more than the second radial distance L2 between the belt cords of the second belt ply and the belt cords of the third belt ply. The cord count E4 of the fourth belt ply is smaller than the cord count E3 of the third belt ply.
PNEUMATIC TIRE FOR HEAVY DUTY
A pneumatic tire for heavy duty having an aspect ratio of 65% or less includes a carcass and a belt layer. A tread portion includes circumferential grooves. The circumferential grooves include a pair of shoulder circumferential grooves and a crown circumferential groove. The crown circumferential groove 11 is a narrow groove and each of the shoulder circumferential grooves is a wide groove. The belt layer includes metal belt cords inclined with respect to a tire circumferential direction. The belt layer has outer ends each positioned outside a respective one of the shoulder circumferential grooves in a tire axial direction. A belt half width is 55% or more and 85% or less of a carcass half width.
Shear band
A shear band for a tire includes a first belt layer extending circumferentially around the tire, a second belt layer extending circumferentially around the tire, and a shear band radially interposed between the first belt layer and the second belt layer. The shear band includes a first reinforcing ply radially adjacent the first belt layer, a third reinforcing ply radially adjacent the second belt layer, and a second reinforcing ply radially interposed between the first reinforcing ply and the second reinforcing ply. The first reinforcing ply includes a first flattened, braided tube layer enclosed by a first rubber layer. The second reinforcing ply includes a second flattened, braided tube layer enclosed by a second rubber layer. The third reinforcing ply includes a third flattened, braided tube layer enclosed by a third rubber layer.
TIRE COMPRISING AN OPTIMIZED ARCHITECTURE
A tire (10) for a vehicle comprises a radially outermost working layer (41) which comprises at least one undulation (412) in line with a central rib (251) of the tread (2). The undulation (412) is radially on the outside of the points of the working layer (41) in line with the bottom face (243) of the circumferential groove (24) closest to the undulation (412) and has an amplitude of at least 1 mm. The undulation (412) is vertically in line above at least one local reinforcing layer (6) comprising reinforcing elements that are mutually parallel and make with the circumferential direction (XX′) of the tire an angle of which the absolute value is at most equal to 5°.
Tire with improved handling performance and speed durability
Embodiments of the disclosure include a pneumatic tire having improved high speed limits while generally maintaining wear, traction, and handling performance. Said tires include a cap ply extending substantially across a full width of at least one of the belt plies and being arranged at least partially within each shoulder, the cap ply forming a layer of elastomeric material reinforced with a plurality of elongate reinforcements spaced apart in an array, the cap ply being characterized as having a rupture force greater than 210 N per 15 mm of the cap ply width. In each shoulder area of said tires, the tread is characterized as being flatter and having a greater tread thickness.
Pneumatic tire
A pneumatic tire comprising a carcass 11, at least one inclined belt layer 13 having a cord extending inclined at an angle of 30° or more relative to the tire circumferential direction, and a tread 15 arranged outward in the tire radial direction of the inclined belt layer 13, wherein a circumferential cord layer 14 arranged inward in the tire radial direction of the tread 15 has a high-rigidity region and a low-rigidity region and the high-rigidity region has a higher negative ratio in a ground contact width of the tread 15 than the low-rigidity region.
Tyre for bicycle wheels
The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre (100) for bicycle wheels comprising: —a carcass structure (2); and —a tread band (7) arranged in a radially outer position with respect to said carcass structure (2); characterised in that said tread band (7) is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer (6, 11) is interposed between said carcass structure (2) and said tread band (7), said protective layer (6, 11) comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres.