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1. WO2020141012 - HEAVY-LOAD VEHICLE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

Claims

1. A heavy-load vehicle (200) comprising at least one axle unit (204), the or each axle unit (204) having at least one wheel (206), each wheel having at least one tire, at least one tire being a tubeless radial tire (100) having, when used as a single tire, a load-bearing capacity per millimeter section width (SW) at a speed of 60 km/h of at least 11 kg, characterized in that the tire (100) has an outer diameter (OD) of less than 755 mm, and is adapted and configured for an internal pressure of at least 10 bar.

2. The heavy-load vehicle according to claim 1 ,

characterized in that the tire (100) has an outer diameter (OD) of less than 735 mm, preferably less than 715 mm.

3. The heavy-load vehicle according to claim 1 or 2,

characterized in that the tire (100) has, when used as a single tire, a load-bearing capacity per millimeter section width (SW) at a speed of 60 km/h of at least 12.5 kg.

4. The heavy-load vehicle according to any of claims 1 to 3,

characterized in that the tire (100) has at a speed of 60 km/h a load- bearing capacity per square millimeter section width (SW) times section height (SH) of at least 80 g, preferably at least 95 g.

5. The heavy-load vehicle according to any of claims 1 to 4,

characterized in that the wire (133) forming at least one bead ring (132) of the tire (100) includes, preferably the wires (133) forming both bead rings (132) of the tire (100) include, a plurality of windings, immediately adjacent wire sections being arranged in a triangular constellation.

6. The heavy-load vehicle according to claim 5,

characterized in that the steel wire (133) of at least one bead ring (132) is arranged, preferably the steel wires (133) of both bead rings (132) are arranged, when seen in a cross-section extending orthogonal to a circumferential direction (C) around the rotational axis (A) of the tire (100), according to a hexagonal shape.

7. The heavy-load vehicle according to claim 5 or 6,

characterized in that at least one bead ring (132) includes, preferably both bead rings (132) include, at least 44, preferably at least 51 , more preferably at least 58, windings of the bead wire (133).

8. The heavy-load vehicle according to any of claims 1 to 7,

characterized in that at least one steel cord (116), preferably each steel cord (116), of a carcass (114) of the tire (100) comprises at least 20, preferably at least 25, steel filaments.

9. The heavy-load vehicle according to any of claims 1 to 8,

characterized in that a belt (122) of the tire (100) has a plurality of belt layers (124, 126, 128, 130), wherein the outermost belt layer (130) has a smaller width than the second-outermost belt layer (128), which in turn has a smaller width than the third-outermost belt layer (126), and wherein the three belt layers (126, 128, 130) are preferably arranged symmetrically one above the other.

10. The heavy-load vehicle according to claim 9,

characterized in that the ratio between the width of the outermost belt layer (130) and the width of the third-outermost belt layer (126) amounts to less than 33%, preferably less than 25%, more preferably less than

17%, and the ratio between the width of the second-outermost belt layer (128) and the width of the third-outermost belt layer (126) amounts to less than 67%, preferably less than 65%, more preferably less than 63%.

11. The heavy-load vehicle according to claim 9 or 10,

characterized in that the steel cords (144) of the outermost belt layer

(130) extend substantially in circumferential direction (C).

12. The heavy-load vehicle according to any of claims 9 to 11 ,

characterized in that the steel cords (138) of the innermost belt layer (124) confine an angle of less than 45°, preferably less than 35°, more preferably less than 25°, with the circumferential direction (C).

13. The heavy-load vehicle according to any of claims 8 to 12,

characterized in that at least one of the carcass (114), the third- outermost belt layer (126) and the innermost belt layer (124) has an ends per decimeter value of at least 50, preferably of at least 55, more preferably of at least 60 ends per decimeter.

14. The heavy-load vehicle according to any of claims 5 to 13,

characterized in that a bead apex (138), preferably made from high elasticity modulus rubber, is located adjacent to and radially outward of at least one of the bead rings (132), preferably both bead rings (132).

15. The heavy-load vehicle according to any of claims 5 to 13,

characterized in that a shoulder apex (140), preferably made from high elasticity modulus rubber, is located in at least one of the wedges, preferably in both wedges, between the belt (122) and the carcass (114).