Boots – shoes – and leggings – Antislipping devices – Calks
Patent
1998-06-19
2000-02-29
Patterson, M. D.
Boots, shoes, and leggings
Antislipping devices
Calks
36 59R, 36 59C, A43C 1500, A43B 2328
Patent
active
060293772
ABSTRACT:
An athletic shoe has a sole composed of an inner layer and an outer layer that comes into contact with the ground surface. In the athletic shoe, a plurality of downward projecting projections are formed on the lower surface of the outer layer as parts of the outer layer, and a ring-shaped flange portion is formed as a part of the outer layer to surround the corresponding projection. The ring-shaped flange portion slants upward from its outer edge toward the inner edge. When a downward pressure greater than a predetermined value acts onto a portion where the projection and the corresponding flange portion are formed, the flange deforms in order to move the projection downward. In another athletic shoe, a plurality of projections is formed on the outer surface of a sole, and a depression is formed in the outer surface of the sole in the vicinity of each of the projections. The athletic shoe is excellent in terms of performance in gripping a soft ground surface such as a lawn surface and the easiness of walking on hard surfaces such as a paved path or a floor.
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patent: 5768802 (1998-06-01), Bramani
Niikura Takayuki
Yamada Tadatoshi
Bridgestone Sports Co. Ltd.
Patterson M. D.
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