| 摘要 |
581,515. Vehicle wheels. KNIGHT, G. H. F., and MECHANISED HORTICULTURAL IMPLEMENTS, Ltd. Aug. 17, 1944, No, 15719. [Class 144 (i)] The ground-engaging edges of strakes a extending from the hub c of a tractor or like wheel are formed of V- or concave shape as viewed in the radial and circumferential directions of the wheel. As shown, the hub is of conical form, the apices of the hub and the strakes being in the centre-plane of the wheel. The side edges of the strakes are connected by edge-on rings h, h<1>.
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