초록 ▼

A maintenance-free, non-pneumatic rubber tire for wheels of slow-moving vehicles such as wheelchairs, push-chairs and carts has a base (14) a rim (15), side walls (13) and a tread (11) of generally constant thickness along the width of the tire. The central region of the tire has one or two continuo

A maintenance-free, non-pneumatic rubber tire for wheels of slow-moving vehicles such as wheelchairs, push-chairs and carts has a base (14) a rim (15), side walls (13) and a tread (11) of generally constant thickness along the width of the tire. The central region of the tire has one or two continuously annular empty space(s) (16) dimensioned to control the spring constant of the tire to a desired value. The tire also contains reinforcement e.g. in the form of a layer of cord (17) or spiral wire.

대표청구항 ▼

A non-pneumatic tire comprising a base for attachment to a vehicle wheel rim, side walls and a tread merging with one another, wherein: (a) the tire includes a single continuous encircling empty space between the said base and the said tread, said encircling empty space has a circular cross-sectiona

A non-pneumatic tire comprising a base for attachment to a vehicle wheel rim, side walls and a tread merging with one another, wherein: (a) the tire includes a single continuous encircling empty space between the said base and the said tread, said encircling empty space has a circular cross-sectional configuration; (b) the size of the said encircling empty space is selected so as to result in a tire wall thickness providing a spring constant k in the range of 100 to 200 N/mm; (c) the said tire contains reinforcing means to maintain the position of the tire on the wheel under substantially all operating conditions; and wherein (d) the said tread is of generally constant thickness along any radius of a tire cross-section taken from a center of said encircling empty space and the ratio of the moment of inertia of the said tread to that of the said side walls is within the range of 0.75 to 3.0.