(57) 1. A shock-absorbing sole structure of the type comprising: a sole with tread (1,
1', 1", 1"', 1"") in turn having at least one heel cavity (3, 3', 3", 3"', 3"") and
at least one sole cavity (5, 5', 5", 5"', 5"") on the upper surface of the tread (1,
1', 1", 1"', 1""), a heel protuberance and a sole protuberance on the lower surface
of the tread (1, 1', 1", 1"', 1"") corresponding to the heel cavity (3, 3', 3", 3"',
3"") and respectively to the sole cavity (5, 5', 5", 5"', 5""); and an element (13,
13', 13", 13"', 13"") for covering the heel cavity (3, 3', 3", 3"', 3"") and the sole
cavity (5, 5', 5", 5"', 5"") to be fixed above the upper surface of the tread (1,
1', 1", 1"', 1""), characterised in that elastic shock-absorbing means (11t and 11p,
11't and 11'p, 11"t and 11"p, 11"'t and 11"'p, 11""t and 11""p) are provided in the
housings defined by the internal walls of the heel cavity (3, 3', 3", 3"', 3"") and
of the sole cavity (5, 5', 5", 5"', 5"") and by the lower wall of said covering element
(13, 13', 13", 13"', 13""), said elastic shock-absorbing means (11t and 11p, 11't
and 11'p, 11"t and 11"p, 11"'t and 11"'p, 11""t and 11""p) being formed by a solid
material with elastic behaviour similar to air.
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