A pneumatic tire includes a carcass layer, a pair of cross belts disposed on an outer side in a radial direction of the carcass layer, and a tread rubber disposed on the outer side in the radial direction of the cross belts. A tread profile when the tire is mounted on a specified rim, inflated to a specified internal pressure, and in an unloaded state is defined by the following elliptic function ([Mathematical Formula 1]) having a center point on a tire equatorial plane. Here, “a” is the radius in a tire width direction and the major axis, “b” is the radius in the tire radial direction and the minor axis, and conditions of 0<b<a, 0<x, 0<y, 1.00<p, 1.00<q and p≠q are satisfied.

[00001]$\begin{array}{cc}{\left(\frac{x}{a}\right)}^p+{\left(\frac{y}{b}\right)}^q=1& \left[\mathrm{Mathematical}\mathrm{Formula}1\right]\end{array}$

A tire monitoring system may include: a state information collecting device installed in a first tire of a vehicle, and periodically transmitting unique identification information according to a rotation period of the first tire; a plurality of wheel speed sensors of which position information is changed according to rotations of a plurality of second tires installed in the vehicle; and a monitoring device for receiving the unique identification information from the state information collecting device, detecting position information of the respective wheel speed sensors according to a receiving time of the unique identification information for a predetermined time, and identifying a position of the first tire based on fluctuating patterns of position information of the respective wheel speed sensors detected according to the receiving time of the unique identification information.

A pneumatic tire in which a side reinforcement layer formed of a treated member is arranged, the treated member formed by coating with rubber organic fiber cords extending parallelly to ply cords of a carcass ply of the carcass main body, only on a sidewall portion of a half portion on one tire widthwise side; a tire radial inner end of the side reinforcement layer is located on a side inner in the tire radial direction than a tire radial outermost position of a rim flange, and a tire radial outer end of the side reinforcement layer overlaps the belt by 5 mm or more in a tire widthwise direction; and the tread portion has one or more circumferential main grooves, and a contact width of a tire widthwise outermost land portion is larger than a contact width of a tire widthwise outermost land portion.

A tire may be re-treaded utilizing a process in which a worn tread is removed from a casing. The worn tread had a first tread pattern. The casing has a tire body encapsulating at least one reinforcing belt, the at least one reinforcing belt embedded circumferentially in the tire body, the at least one reinforcing belt having lateral edges. The first tread pattern comprises a first plurality of universal bands of raised portions, where the first plurality of universal bands were situated over the lateral edges of the at least one belt. A new tread having a second tread pattern different from the first tread pattern is molded to the first casing. The second tread pattern comprises a second plurality of universal bands of raised portions that are situated in the same lateral locations as the first plurality of universal bands.

A walking mechanism for driving a machine body includes a walking wheel group having a plurality of walking wheels attached to the machine body, with two front and two rear wheels relative to a traveling direction. The machine body has two sides with a pair of one of the front wheels and a one of the rear wheels being respectively located on each of the sides and driven to rotate synchronously. Each walking wheel includes an auto tire casing with a tread outer side having a tread pattern distributed along a circumferential direction of the auto tire casing. The tread pattern is configured as a plurality of tread ribs with a respective tread groove formed between each adjacent pair of the tread ribs, the tread pattern radiating outward from an axial center of the walking wheel. A related robot and self-walking mower are also disclosed.

A tire has a cap rubber formed of nonconductive rubber and forms a ground surface, and a conductive portion provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction. The conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber. The conductive portion is relatively small in a thickness in the ground surface and a side surface of the cap rubber, is relatively large in the maximum thickness of an intermediate portion between the ground surface and the side surface of the cap rubber, and is formed into a crescent shape which is curved into an outer side in a tire width direction and an outer side in a radial direction, in a tire meridian cross section.

A non-inflatable tire for an agricultural implement, including a sole, a tread, and a pair of sidewalls connecting the sole to the tread is provided. A first sidewall extends from the sole to the tread, while the second includes an internal portion which extends from the sole to the tread and an external portion projecting from the tread. The first sidewall and the tread are designed so as to jointly hold the external portion of the second sidewall in line with the internal portion.

A pneumatic tire includes a first main groove in a circumferential direction outward of an equatorial plane in a vehicle width direction, a second main groove in the circumferential direction at a position closer to the equatorial plane than the first main groove, a third main groove in the circumferential direction at a position inward of the equatorial plane in the vehicle width direction, and a fourth main groove in the circumferential direction at a position farther from the equatorial plane than the third main groove; relationships 1.05G1/G31.25, 1.20G2/G31.40, and 1.10G4/G31.30 are satisfied; and relationships G3<G1<G2 and G3<G1<G4 are satisfied, where G1 is a first main groove width, G2 is a second main groove width, G3 is a third main groove width, and G4 is a fourth main groove width.

A pneumatic tire includes a fastener disposed on a tire inner surface, the fastener being a first fastener of a separatable pair of mechanical fasteners and being composed of at least two fastener members. The at least two fastener members sandwich a rubber-coated fiber reinforced member and fix together. The fastener is disposed at a position such that a distance (D) in a tire width direction from a center position (C) of the fastener to a tire equator line (L) and a maximum width (W) of the tire satisfy a following relationship: 0D/W0.40. The fiber reinforced member includes a plurality of fiber bundles disposed in alignment in at least one direction, a number of fiber bundles Y (bundles/50 mm width) per unit width of the fiber reinforced member being such that: 20Y (bundles/50 mm width)90.

An aircraft tire includes a tire body forming an outer peripheral part of an aircraft wheel; and a protrusion with a pressure receiving surface configured to receive flight wind pressure toward one end and a streamline shape tapering toward another end. The protrusion rotates the aircraft wheel before touchdown through flight wind pressure received by the pressure receiving surface. The protrusion includes a pair of legs; a weight portion with a center of gravity positioned outwardly of respective horizontal positions of the pair of legs with respect to a center line widthwise of the tire body; and a hollow part extending between the ends of the protrusion. Centrifugal force that acts on the weight portion causes the pair of legs to fall over in a direction toward an outer periphery of the tire body to narrow the hollow part for reduction of an area of the pressure receiving surface.