Patent classifications
B60C2009/2219
TIRE
A band 20 of a tire 2 includes a full band 48 covering an entirety of a belt 14, and a pair of edge bands 50 disposed so as to be spaced apart from each other in an axial direction and each covering an end 46 of the belt 14. A cross-section of the band 20 includes a large number of cross-sections of a band strip 52. In a cross-section of the full band 48, a plurality of cross-sections of the band strip 52 are aligned with a gap therebetween. In a cross-section of each edge band 50, a plurality of cross-sections of the band strip 52 are aligned without any gap therebetween. An inner end 62 of each edge band 50 is located so as to be spaced apart from a bottom BT of a shoulder circumferential groove 24s in the axial direction.
TYRE
A tyre includes a tread portion being provided with a pair of shoulder circumferential grooves on an outer surface thereof and a tread reinforcing layer disposed in the tread portion. The tread reinforcing layer includes a circumferential belt layer having a plurality of first reinforcing cords oriented along a tyre circumferential direction. The circumferential belt layer includes a pair of axially spaced first circumferential belt plies extending in radially inner regions of the pair of shoulder circumferential grooves. The pair of first circumferential belt plies is arranged apart from one another at a distance L equal to or more than 20 mm in a tyre axial direction.
PNEUMATIC TIRE
A pneumatic tire is described which includes a tread, a carcass and a belt structure interposed between the carcass and the tread. The belt structure includes a first and second working belt, wherein the angle of the working belts range from about 12 degrees to about 30 degrees, wherein the belt structure further includes a low angle belt located between the working belts. The first working belt is the radially innermost belt, and is the widest belt. The second working belt is radially outward of the low angle belt, and has first and second lateral ends that are located adjacent first and second lateral belts. The first and second lateral belts are low angle belts. The pneumatic tire may further include an optional third working belt, that is the radially outermost belt.
Pneumatic Tire
In a state in which the pneumatic tire is mounted on a regular rim and inflated to 5% of a specified internal pressure, a tread width is TW, a total tire width is SW in a tire meridian cross-sectional view, a relationship of 0.80≤TW/SW≤0.95 is satisfied, a ground contact width at a load of 100% of a maximum load capacity is CW100, a ground contact width at a load of 70% of the maximum load capacity is CW70, and a relationship of 1.04≤CW100/CW70≤1.15 is satisfied.
Pneumatic tire and method for manufacturing the same
A pneumatic tire and a method for manufacturing the same are provided. In a step of laminating belt reinforcing layers on an outer circumferential side of a belt layer constituting a green tire, wherein the belt reinforcing layers cover each of a tire width direction left edge portion and right edge portion of the belt layer and are separated from each other in the tire width direction, each of the belt reinforcing layers is formed by inclining strip members constituting each of the reinforcing layers in a same direction with respect to a tire circumferential direction, and winding the strip members in a spiral-like manner at least one time around in the tire circumferential direction.
Pneumatic tire
A pneumatic tire includes a tread portion, sidewall portions, bead portions, and has at least one carcass layer disposed between the pair of bead portions. The ratio SW/OD between the total tire width SW and the tire external diameter OD satisfies the relationship SW/OD0.3. A first region A is defined between a pair of first boundary lines (L1, L1), second regions B are defined between a first boundary line (L1) and a second boundary line (L2), and third regions C are defined on the bead toe side of the second boundary lines (L2). Defining SA, SB, and SC as the cross-sectional area (mm.sup.2) of the first region A to the third region C, and defining the peripheral lengths (mm) of the first region A to third region C along the tire inner surface as a, b, and c, respectively, the relationship 7.5SA/a11.5 is satisfied.
Tyre for wheels of heavy transport vehicles
A tyre includes a carcass structure including at least one carcass ply, a belt structure applied in a radially outer position with respect to the carcass structure, and a tread band applied in a radially outer position with respect to the belt structure. The belt structure includes two main belt layers and first and second reinforcing strips incorporating a plurality of reinforcing elements arranged substantially in the circumferential direction. The reinforcing elements include at least one high-elongation metal cord including a plurality of intertwined strands, and each strand includes a plurality of filaments. Each filament has a diameter not greater than 0.175 mm.
Pneumatic tire with specified tread rubber layer thickness and sound-absorbing member width
The present technology provides a pneumatic tire having a strip-shaped sound-absorbing member bonded on the inner surface of the tire includes a plurality of belt layers, two or more belt cover layers, one or more belt edge cover layers, and a thread rubber layer. The thickness of the tread rubber layer is substantially uniform in the region X where the sound-absorbing member is located so that the difference between the thickness t1 at an end of the sound-absorbing member and the thickness t0 at the position of the tire equator is equal to or less than 0.5 mm. The thickness of the tread rubber layer is smaller in the region Y where the belt edge cover layer is located than in the region X so that the difference between the minimum value t2 of the thickness in the region Y and the thickness t0 ranges from 1.0 to 4.0 mm.
PNEUMATIC TIRE
A pneumatic tire comprising a carcass 12, at least one inclined belt layer 13, at least one first circumferential cord layer 14 arranged inward in the tire radial direction of the inclined belt layer 13, a tread 16 arranged outward in the tire radial direction of the inclined belt layer 13, and a second circumferential cord layer 15 which is arranged outward in the tire radial direction so as to cover a tire width direction end of the inclined belt layer 13, and where X is defined as X=Y=nmd, Y is the Young's modulus (GPa) of the cord, n is the number of cords implanted (cords/50 mm), d is the cord diameter (mm), and m is the number of the first circumferential cord layers 14, X is smaller than X of the first circumferential cord layer 14.
Pneumatic tire and method of manufacturing the pneumatic tire
A method of manufacturing a pneumatic tire includes forming a green tire. Forming the green tire includes: a first step of forming a first belt portion by winding a first belt on an outer peripheral surface of an inner liner and, thereafter, forming a second belt portion by winding a second belt on the first belt portion thus acquiring a belt layer; and a second step of acquiring a reinforcing layer by winding a reinforcing belt on the second belt portion. The second step includes: a first parallel winding treatment where the reinforcing belt is wound one turn on a first circumference; a spiral winding treatment where the reinforcing belt is spirally wound in a tire width direction; and a second parallel winding treatment where the reinforcing belt is wound on a second circumference within a range of from 24030 with one turn set to 360.