The present invention provides a puncture-proof and run-flat tire with a spare tire that could be rapidly assembled and be adaptive to an tire body by finely adjusted and locked, thereby providing puncture-proof and run-flat function. The puncture-proof and run-flat tire includes an tire body having two protruding hooks on two inner edges on two sides of an inner ring of the tire body and a spare tire tightly engaged with one of the two protruding hooks of the tire body. Therefore, a vehicle could continue travelling safely if the tire body becomes flat due to damage caused by foreign objects. The spare tire includes a plurality of spare tire blocks assembled with an elastic ring, a first fine-adjustment wire, and a second fine-adjustment wire. Therefore, the spare tire could be rapidly mounted on the protruding hooks of the tire body to form the puncture-proof and run-flat tire.

The disclosure pertains to the tyre industry and relates more specifically to a system of lining levels for protecting tyres that prevents pointed objects from puncturing the air chamber, or in tubeless tyres prevents pointed objects from emptying the air from the tyre, being applicable to practically all types of tyre. According to the disclosure, when the puncturing object comes into contact with the tread, it is bent and deformed, preventing it from coming into contact with the air chamber or with the air in the case of tubeless tyres. The puncturing object penetrates the rubber of the tyre, but when it reaches the lining, instead of puncturing it or deforming it, the object is bent due to a hardness ratio between the lining and the tread combined with the movement of the wheel.

A runflat assembly comprises a plurality of circumferentially extending section parts interconnectable together into an annular configuration to fit around a wheel, the runflat assembly including a connector member configured to interconnect two of the circumferentially extending section parts, the runflat assembly including a retraction mechanism operable to act on the connector member to selectively permit the two circumferentially extending section parts to be spaced apart from each other in a first configuration of the connector member and draw the two circumferentially extending section parts towards each other in a second configuration of the connector member, wherein the connector member is configured to be releasable from at least one of the two circumferentially extending section parts.

The tire (10) comprises a crown (12), two sidewalls (30A, 30B), two beads (32A, 32B), an inner surface (33) delimiting a toroidal cavity (35), and a stiffening structure (50) comprising a stiffening element (52) extending continuously into the toroidal cavity (35) from at least one of the sidewalls (30A, 30B) or one of the beads (32A, 32B) to the crown (12). The stiffening element (52) is anchored in or around: a radially inner reinforcing structure (60A, 60B) arranged in the sidewall (30A, 30B) and/or the bead (32A, 32B), the radially inner reinforcing structure (60A, 60B) being distinct from the circumferential reinforcing element (40A, 40B) situated on the same side of the median plane (M) of the tire (10) as the sidewall (30A, 30B) and/or the bead (32A, 32B), and a radially outer reinforcing structure (70A, 70B) arranged in the crown (12).

A tire (10) includes a stiffening structure (50) comprising stiffening elements (52) anchored in the crown (12) and extending into the toroidal cavity (35) between a radially inner anchor point (54A, 54B) and a radially outer anchor point (56A, 56B). The tread (14) has a profile height and comprises a plurality of ribs (102, 104, 106, 108, 110), two adjacent ribs being axially separated from each other by a main circumferential cut-out (112, 114, 116, 118) having a depth greater than or equal to 50% of the profile height. The radially outer anchor point (56A, 56B) is aligned with one of the ribs (102, 104, 106, 108, 110).

The present invention provides a puncture-proof and run-flat tire with a spare tire that could be rapidly assembled and be adaptive to an tire body by finely adjusted and locked, thereby providing puncture-proof and run-flat function. The puncture-proof and run-flat tire includes an tire body having two protruding hooks on two inner edges on two sides of an inner ring of the tire body and a spare tire tightly engaged with one of the two protruding hooks of the tire body. Therefore, a vehicle could continue travelling safely if the tire body becomes flat due to damage caused by foreign objects. The spare tire includes a plurality of spare tire blocks assembled with an elastic ring, a first fine-adjustment wire, and a second fine-adjustment wire. Therefore, the spare tire could be rapidly mounted on the protruding hooks of the tire body to form the puncture-proof and run-flat tire.

A run-flat device includes several support units fixed in an annular arrangement. Each of the support units has a main wall. A side of each of the main walls is connected to a hook portion. A retaining ring fits around the hook portions. Another side of each of the main walls is connected to an outer wall, a middle wall, and an inner wall. A blocking wall is connected between each of the outer walls and each of the inner walls. A steel cable through hole and an elastic ring through hole are separated by each of the middle walls. A steel cable ring passes through the steel cable through holes. An elastic ring passes through the elastic ring through holes and fits in the elastic ring through holes. An inlet is form on each of the blocking walls. The elastic ring passes through the inlets after being compressed.

A run-flat device includes several support units fixed in an annular arrangement. Each of the support units has a main wall. A side of each of the main walls is connected to a hook portion. A retaining ring fits around the hook portions. Another side of each of the main walls is connected to an outer wall, a middle wall, and an inner wall. A blocking wall is connected between each of the outer walls and each of the inner walls. A steel cable through hole and an elastic ring through hole are separated by each of the middle walls. A steel cable ring passes through the steel cable through holes. An elastic ring passes through the elastic ring through holes and fits in the elastic ring through holes. An inlet is form on each of the blocking walls. The elastic ring passes through the inlets after being compressed.