Sumitomo Rubber Industries Limited

Hyogo Prefectural Government of Japan

Hiroshi Matsui

Masayuki Sakamoto

Chieko Aoki

Susumu Tanaka

Takaaki Ishida

Minoru Tanaka

Genzo Hashizume

Satoru Nakagawa

A run-flat tire capable of reducing weight and enhancing its uniformity. The run-flat tireprovides a toroidal carcassextending from a tread portionto the bead core of each bead portionthrough each of sidewall portionsand a pair of side reinforcing rubbersarranged inside the carcassand extending along the sidewall portionsin the tire radial direction inwardly and outwardly. In the outer surface of the tread portion, pattern elements are arranged, thereby forming a pitch pattern. Each of the side reinforcing rubberprovides with recessescircumferentially spaced on the inner surface of side reinforcing rubber facing the tire cavity. The total number (n) of recesseson each of the side reinforcing rubberis 0.70 to 1.30 times the total number of pattern elements.

Run-flat tire

A pneumatic tire is provided in at least one of sidewall portions with a wheelrim protector which overhangs a flange of a wheelrim and protrudes axially outwardly from the axially outer end of the flange, the wheelrim protector is provided with at least one circumferential slit around the axis of the tire. In case of a slit extending continuously in the tire circumferential direction, the slit can be formed in a wedge-shaped cross sectional shape. In case of discontinuous slits, the slits are arranged around the tire axis and inclined with respect to the adjacent carcass cords at 45 to 80 degrees.

Pneumatic tire

This disclosure deals with ettringite whiskers, methods of synthesizing such whiskers and ettringite whisker composites. The ettringite whiskers, having a new crystal form, are 1-2 .mu.m in diameter, 50-100 .mu.m in length and approximately 30-50 of aspect ratio. The ettringite whiskers are especially useful in industry as a high tensile strength reinforcement, they increase self-extinguishability and the productive capacity of making sheets, boards of the like.

Novel ettringite whiskers, production and uses

Growing community of inventors

Kobe, Japan

Hiroshi Matsui