Boots – shoes – and leggings – Soles – Rope
Patent
1989-09-27
1992-07-21
Sewell, Paul T.
Boots, shoes, and leggings
Soles
Rope
36 28, 36 30R, 36 31, 36114, 36 32R, A43B 1300, A43B 1318, A43B 1312, A43B 500
Patent
active
051311739
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an outsole for sports shoes comprising a carrier element of relatively hard material and relatively softer sole portions secured to the carrier element on the outward side thereof.
In a known sports shoe sole of the kind set forth above (U.S. Pat. No. 4,030,213), the sole portions which comprise very yielding rubber or corresponding elastomeric material are secured to a carrier element which in turn consists of a comparatively hard material, for example hard rubber or light metal or alloy, and consequently is generally stiff. The carrier element is of an arcuately curved configuration in the longitudinal direction of the sole on the underside thereof and in the shank region is of such a thickness that it comes into contact with the ground and is thus operative as a support, between the parts of the sole which are fixed on the front sole portion and in the heel region. The intention behind that outsole construction is that, when running and in particular with the rolling movement of the foot, the foot is supported firmly and relatively uniformly in respect of position by means of the carrier element, while however, due to the softly yielding sole portions, the sole provides a substantial impact damping effect and a certain catapult effect.
Although, by virtue of the arrangement of the softly yielding sole portions under the non-deformable stiff carrier element, that known sole construction provides a good impact damping action, it does however suffer from the disadvantage that the stiff carrier element completely prevents the natural rolling motion and movements of the foot and the support and guide function which it is intended to perform is very substantially adversely affected by the yielding sole portions.
The object of the present invention is to provide an outsole of that kind, in which the support and guide function is not adversely affected by the yielding sole portions.
In accordance with the invention, that object is attained in that the carrier element is a sole plate with stiffening walls which are disposed approximately perpendicularly to the surface of the sole plate and which substantially follow the contour of the edge of the sole, and that to provide for deformability of the carrier element in the shank region the height of the stiffening walls in the shank region of the sole plate is at least locally markedly lower than in the heel region of the sole plate.
The invention is based on the consideration that the support and guide function which the outsole is to perform in relation to the foot may not be transferred to the carrier element which is of a stiff shape, to such an extent that the foot can no longer perform its natural movement. As biomechanical investigations have shown, the support and guide function requires control by the foot itself; that cannot be achieved by a carrier element alone and is consequently eliminated by virtue of a stiff non-deformable carrier element. For that reason the carrier element in the outsole according to the invention is in the form of a sole plate which in itself has a certain degree of stiffness of shape but which is fixed by a `frame` of lateral stiffening walls in the manner of a double-T-beam. Without the thickness of the sole plate itself having to be altered, that fixing effect and therewith the longitudinal stiffness can be very specifically adjusted, by means of the height of the lateral stiffening walls. In that connection, a reduced height of the stiffening walls in the shank region ensures that in that area the sole plate can perform both a bending movement about a transverse axis and also a torsional movement about a longitudinal axis in order to be able to follow the corresponding movements of the foot in the rolling motion thereof, to the necessary degree. Therefore, in combination with the above-mentioned control action by the runner himself, the carrier element can perform the desired support and guide function without adversely affecting the runner in his running movement and fatigueing him, by virtue of an un
REFERENCES:
patent: 3597199 (1986-07-01), Hong
patent: 4030213 (1977-06-01), Daswick
patent: 4366634 (1983-01-01), Giese et al.
patent: 4389798 (1983-06-01), Tilles
patent: 4866860 (1989-12-01), Blissett et al.
Adidas AG
Patterson Marie D.
Sewell Paul T.
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