396 results about "Flat tire" patented technology

A non-pneumatic tire for supporting a load by working in tension comprising a generally annular inner surface, a generally annular outer ring, and an interconnected web having a plurality of web elements and comprising a plurality of generally polygonal openings. Web elements are sized, oriented and comprised of a material that facilitates buckling when subjected to a compressive load. By buckling, those elements in a deformed portion of the tire between a hub and a footprint region where the tire contacts a surface may assume a significantly reduced portion of the load, if any. This causes web elements in other portions of the interconnected web to operate in tension to support the load. Since the tire is non-pneumatic, it may be easier to maintain and may have a longer life than standard pneumatic tires since it eliminates the possibility of blowouts, flat tires, or tires operating with low air pressure. By virtue of the portion of the tire in the footprint region not bearing a significant portion of the load, non-pneumatic tire may also exhibit a more comfortable ride subject to less noise and vibration and improved handling capabilities.

An apparatus and method are provided for controlling the air pressure within one or more tires on a vehicle. Means are provided for controlling air pressure dynamically or manually in response to road conditions. Instrumental in the invention is the ability to control the air pressure at each wheel from a remote location using positive control that substantially reduces the chance leaks anywhere else in the system would result in inadvertent flat tires.

A device for serving as a wheel for motor vehicles, where the wheel has its tire tread replaceable when it is worn out via unique rims and molded tire features. An alternate internal structure prevents the tire from “going flat” or “blowing out” when it is punctured or cut. In one variation the tire can be used with existing rims and can be retro-fitted into existing tire by mating the tires with this invention's “Non-Flat Tire” internal element and special rim. A variation of the “Non-Flat Tire” system uses spring-like materials for its tire core that is shaped similar to a tire's inner tube, and functions like an “air-filled” tire, but the absence of the use of air in this unique configuration gives it the “Flat Tire Prevention” effect.

The invention provides a vehicle control method and a system and a vehicle. The control method comprises the following steps: when a vehicle has a flat tire, an electric assistance steering system, an engine control module and a vehicle body electronic stabilizing system are started to automatically control the vehicle; the electric assistance steering system controls a rotating angle of a steering wheel according to a predicted driving trajectory before tire burst, so that the vehicle is maintained on the predicted driving trajectory before tire burst; the engine control module limits an output torque of an engine according to a preset safety torque threshold; and the vehicle body electronic stabilizing system distributes the braking force applied to each wheel according to a target punctured tire to control stable braking of the vehicle. The method can automatically control the vehicle to keep reasonable driving trajectory after tire burst, and stably reduces the speed to improve the safety and the reliability of the vehicle when the vehicle has a flat tire.

The invention provides a flat tire pressure monitoring module, which is characterized by changing sampling frequency and sampling content of tire pressure according to automobile speed and changing transmission intervals of sampling information data packets according to a set threshold Py of dangerous tire pressure.

A run-flat tire of the present invention is a pneumatic radial tire for passenger vehicles which has a carcass composed of plies of radially arranged cords toroidally extending between a pair of bead portions, and the a W/L ratio of the section width W to the outer diameter L of the tire is 0.25 or less.

There is provided a pneumatic tire having an aspect ratio of not less than 60 and considerably improving run flat durability as compared with the conventional type of the run flat tire, wherein at least one cushion rubber layer having a loss tangent lower than a loss tangent (tan delta) of a coating rubber for cords of a carcass ply is arranged between an end portion of a belt and a reinforcing rubber layer in a shoulder region and between mutually adjacent tire constitutional members. And also, when the carcass is comprised of plural plies, at least one ply is separated off in a zone beneath the belt, whereby the ride comfort against vibrations can be more improved.

A dolly for placement beneath a landing gear of an aircraft that enables transport of the aircraft without rolling the tire of the aircraft. The dolly includes a platform for a tire to rest on and a channel for positioning the tire. The dolly includes a winch for translating the dolly and aircraft tire relative to each other such that the landing gear is brought to rest on the platform, and one or more stops for securing the aircraft landing gear with respect to the dolly. Once positioned, the dolly can be used while transporting the aircraft, either by hand pushing, a hand towbar, a motorized tug with a towbar, or other mode. The dolly is useful for moving aircraft in tight spaces and is also useful for transporting aircraft with damaged landing gear or flat tires.

A wheel on a vehicle having a flat tire may be protected by attaching a first semi-cylindrical shell having a first planar end to the wheel, and attaching a second semi-cylindrical shell to the first semi-cylindrical shell. The first semi-cylindrical shell and the second semi-cylindrical shell are secured together so as to form a cylindrical shell of diameter having a cylindrical wall which covers a tread surface of the flat tire. The first semi-cylindrical shell is attached to the wheel to cover a first portion of a tread surface of the flat tire; and, after attaching the first semi-cylindrical shell, the wheel is rotated. The first portion of the tread surface does not contact a ground surface prior to the rotation step, but does contact a ground surface through the first semi-cylindrical shell after the rotation step. A connector for connecting the semi-cylindrical shells to the wheel is also disclosed.

Provided is a run-flat tire in which a higher compatibility between the riding comfort and the run-flat travel durability during normal travelling can be attained.

Provided is a run-flat tire comprising a bead portion 1, a side wall portion 2, a tread portion 3, a carcass 4 composed of one or more carcass plies extending toroidally between the pair of bead portions to reinforce these portions, and a side reinforcing rubber layer 5 having a crescent cross-sectional shape arranged on the inside of the carcass at the side wall portion.

The carcass ply cord is a hybrid cord formed by twisting a filament composed of cellulose fibers and a filament composed of nylon, the thermal shrinkage stress (cN/dtex) of the hybrid cord at 177° C. after an adhesive treatment is not less than 0.20 cN/dtex, and the thermal shrinkage stress (cN/dtex) of the hybrid cord at 177° C. drawn from a tire product is not less than 0.10 cN/dtex.

A safe and fuel-efficient automatic pressure-regulating wheel is characterized in that the safe and fuel-efficient automatic pressure-regulating wheel comprises a sealing mechanism, a wheel mechanism and a pressure-regulating mechanism; the sealing mechanism is provided with a seal and a sealing ring; the wheel mechanism comprises a main wheel and an auxiliary wheel, wherein the main wheel is provided with a rim supporting ring while the auxiliary wheel is provided with an auxiliary rim supporting ring; and the pressure-regulating mechanism is provided with a bi-metal drum inside which a surge chamber is disposed, and a plenum chamber is arranged outside the bi-metal drum. The safe and fuel-efficient automatic pressure-regulating wheel has the advantages that with the functional material bi-metal drum as the tire pressure-regulating device, an air chamber of the tire is divided into the plenum chamber and the surge chamber, and when the temperature of the tire rises, an active layer on the inner wall of the bi-metal drum swells, and the drum waist of the bi-metal drum depresses toward the surge chamber along with the active layer, so that the volume of the plenum chamber of the tire increases, and tire pressure drops, and when the temperature of the tire drops, the active layer of the bi-metal drum shrinks, the drum waist of the bi-metal drum returns the plenum chamber, and the pressure in the plenum chamber recovers, so that the purposes of automatically regulating pressure, preventing a flat tire and driving with fuel-efficient effect are realized.

This invention relates to a tire having an improved durability in the run-flat running without damaging the ride comfort in the usual running, and more particularly to a run-flat tire comprising a sidewall portion provided with a side reinforcing rubber layer having a crescent shape at section wherein a cord layer including a polyketone fiber cord satisfying the following conditions of the following equations (I) and (II):

σ≧−0.01×E+1.2   (I)

σ≧0.02   (II)

[wherein σ is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)] is disposed in at least a part of a region A ranging from a belt end to a maximum width part of a tire side portion and a region B ranging from a neighborhood of a bead core to a bead filler.

The invention relates to the field of tires, in particular to a run-flat tire. The run-flat tire comprises a tire bead, wherein the tire bead is internally filled with triangular rubber; a bead ring is arranged at the bottom end of the triangular rubber; a tire body layer is arranged around the tire bead; the tire body layer is turned back from the inner side to the outer side of the tire; a belt beam layer is arranged on the outer side of the tire body layer in the radius direction and inside a tire tread part; a tire sidewall supporting rubber layer is arranged between the tire body layer at a tire sidewall and a lining layer; and a tire bead reinforcing layer is arranged on the side surface of the tire bead. Compared with the ordinary run-flat tire, the run-flat tire disclosed by the invention has the advantages as follows: the hardness of tire sidewall supporting rubber is relatively reduced, so that the driving comfort is optimized to a certain extent; under the condition of the same rigidity, the thickness of the tire sidewall supporting rubber is reduced, so that the weight reduction of the tire is facilitated; during to reinforcement of a reinforcing material on a seam allowance position, the flexible deformation of the seam allowance position is relatively small in a run-flat state, and in combination with the reduction in the thickness of the supporting rubber, heat generation at the tire sidewall is reduced and heat dissipation is facilitated, so that improvement on the durability of the tire is facilitated.