Competition wheelchair tire
AssigneeBridgestone Corporation
InventorKohei Sahashi
Life of this patent
Estimating the term…
Abstract
In regions, divided by the tire equator, on both sides of the tread surface of a tire, the tire includes a grip area along the entire circumference of the tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from the outline of the tread surface, that extend from the tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel, and a plurality of sipes that extend toward the tire equator in a direction inclined relative to the tire equator, starting in the grip area and terminating before the tire equator. The negative ratio in the grip area is higher than the negative ratio closer to the tire equator than the grip area.
Claims9
A competition wheelchair tire comprising:
- in regions, divided by a tire equator, on both sides of a tread surface of a tire, a grip area along an entire circumference of a tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from an outline of the tread surface, that extend from a tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel;
- and a plurality of sipes that extend from the grip area toward the tire equator in a direction inclined relative to the tire equator, and terminate between a tire equator side edge of the grip area and the tire equator, wherein the plurality of sipes do not extend into the grip area, a negative ratio in the grip area is higher than a negative ratio closer to the tire equator than the grip area, an area inside the tire equator side edge of the grip area in a tread width direction is free of recessed lines, and an opening width of the plurality of sipes is larger than an opening width of the plurality of the recessed lines.
Dependencies are inferred from the claim text.