A run-flat tire
Patent Information
- Application Number
- CN202610920316.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-24
- Publication Date
- 2026-08-18
AI Technical Summary
[0002]通用车辆充气轮胎在高速行驶时爆胎,车辆会失控,造成严重交通事故,无气轮胎虽不会爆胎,但失去了乘坐舒适性
[0003] This patented invention relates to a run-flat tire, which is a multi-layered, nested, airless tire installed inside a pneumatic tire, with a diameter a few centimeters smaller than that of the pneumatic outer tire (this invention uses only two nested layers; the number of layers depends on the wheel diameter). During normal vehicle operation, the pneumatic outer tire supports the vehicle, providing good vibration damping. In the event of a tire blowout, the inner airless tire takes over, stabilizing the vehicle. Since the entire airless tire cannot be fitted inside the pneumatic outer tire, a multi-layered nested structure is used for ease of installation. To ensure a tight fit between the inner and outer layers, a concave-convex structure is used, allowing for a close interlocking fit. During installation, the outermost layer is first installed into the pneumatic outer tire, followed by the innermost layer, until the entire airless tire is inside. Finally, both the airless and pneumatic tires are mounted on the rim. To reduce weight and save materials, the run-flat tire can be perforated around the rim and dynamically balanced. This patented design is simple, easy to manufacture, inexpensive, and readily adopted.
Smart Images

Figure CN122584865A_ABST
Abstract
Description
Technical Field
[0001] This application pertains to the field of vehicle tire explosion protection, and particularly relates to explosion-proof tires. Background Technology
[0002] When a pneumatic tire on a general-purpose vehicle bursts at high speed, the vehicle loses control, causing serious traffic accidents. While a flat tire won't burst, it sacrifices ride comfort. This patented invention uses a flat tire installed inside a pneumatic tire. When the outer pneumatic tire bursts at high speed, losing support for the vehicle, the flat tire inside directly takes over, providing support and preventing the vehicle from losing control. Summary of the Invention
[0003] This patented invention relates to a run-flat tire, which is a multi-layered, nested, airless tire installed inside a pneumatic tire, with a diameter a few centimeters smaller than that of the pneumatic outer tire (this invention uses only two nested layers; the number of layers depends on the wheel diameter). During normal vehicle operation, the pneumatic outer tire supports the vehicle, providing good vibration damping. In the event of a tire blowout, the inner airless tire takes over, stabilizing the vehicle. Since the entire airless tire cannot be fitted inside the pneumatic outer tire, a multi-layered nested structure is used for ease of installation. To ensure a tight fit between the inner and outer layers, a concave-convex structure is used, allowing for a close interlocking fit. During installation, the outermost layer is first installed into the pneumatic outer tire, followed by the innermost layer, until the entire airless tire is inside. Finally, both the airless and pneumatic tires are mounted on the rim. To reduce weight and save materials, the run-flat tire can be perforated around the rim and dynamically balanced. This patented design is simple, easy to manufacture, inexpensive, and readily adopted. Attached Figure Description
[0004] Figure 1 Internal view of a fully assembled airless tire being fitted with an inflatable outer tire; Figure 2 A view of the fully assembled airless tire; Figure 3 A view of the inner structure of a pneumatic tire with concave grooves on the outer ring; Figure 4 A view of the outer structure of a pneumatic tire with a convex inner ring; Figure 5 This is a schematic diagram of the inner structure of a pneumatic tire. Figure 6 This is a schematic diagram of the outer structure of a pneumatic tire.
Claims
1. This run-flat tire uses a multi-layer nested structure.
2. The mating surfaces of the inner and outer components use a concave-convex structure to ensure a tight interlocking between the inner and outer components.
3. Used inside an inflatable container.
4. The diameter of the explosion-proof inner tube is a few centimeters smaller than the diameter of the inflatable outer tire.