| 摘要 |
The retractable studded tire includes studs in the tread wall movable between extended road-engaging and retracted non-road-engaging positions, and a self-contained power unit for selectively causing extension or traction of the studs. The power unit includes a high pressure air chamber and a low pressure air chamber for controlling stud position and the low pressure air chamber additionally maintains the tire in inflated condition. The studs are movable in stud holes formed in the tread wall and a diaphragm is provided for pneumatically sealing the area around the studs and stud holes from the low pressure air chamber to prevent leakage of air from the low pressure chamber.
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