Boots – shoes – and leggings – Boots and shoes – Occupational or athletic shoe
Patent
1998-06-15
2000-03-14
Sewell, Paul T.
Boots, shoes, and leggings
Boots and shoes
Occupational or athletic shoe
36115, 36 59R, A43B 500, A43B 2328
Patent
active
06035559&
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to footwear and more particularly to a sole for footwear having a structure for minimising injury to the wearer as may arise from twisting or turning movements which may occur during certain sporting activities, and/or for enhancing performance by assisting rotational movement of the foot.
BACKGROUND OF THE INVENTION
A footwear sole incorporating a turntable to minimise injuries of the type just discussed is disclosed in International patent applications PCT/AU91/00590 and PCT/AU94/00002 ("the earlier applications"), the disclosure of which is hereby incorporated by reference. The present invention relates to further developments of, and/or variations of, the general concepts disclosed in these earlier applications.
In the earlier applications a turn table of a generally circular shape is incorporated into a recess in the sole and is capable of rotation through a limited angular extent as defined by a series of interengaging projections and recesses between the turntable and the structure of the sole. The actual effect of the turntable in practice is to allow the sole to pivot about the turnable if the foot is turned or twisted when the turntable is in contact with the ground. The turntable is also subject to a resilient bias which has the effect of returning it to its initial position relative to the sole when the sole is lifted from the ground. The resilient bias may be applied by integral elastomeric projections extending from the turntable as disclosed in application PCT/AU91/00590, or by means of a coil spring assembly incorporated between the underside of the turntable and the sole as described in application PCT/AU94/00002.
SUMMARY OF THE INVENTION
A first aspect of the present invention has particular applicability for use in environments where the footwear is likely to be used on playing surfaces which are liable to become muddy or which are composed of loose particulate material.
According to a first aspect of the invention, there is provided a sole for footwear, said sole having a recess within which is mounted a turntable for rotation in either direction of rotation from a rest position, with the angular extent of rotation from the rest position being restricted, and means interposed between the turntable and sole for preventing ingress of mud and dirt into the recess.
Further according to this aspect of the invention, there is provided a sole for footwear having a turntable within the sole and connected thereto by a resilient web which provides a seal between the periphery of the turntable and the sole, said web being resiliently deformable in response to rotation of the turntable in either direction from a rest position to apply resilient bias to the turntable to restore the turntable towards its rest position.
A second aspect of the present invention relates to various biasing arrangements which can be used with the turntable.
According to the second aspect of the invention, there is provided a sole for footwear comprising a recess with a turntable mounted therein for rotation in either direction from a rest position, means for restricting rotation of the turntable, and resilient means for applying a bias to restore the turntable to its rest position after rotation.
A third aspect of the present invention relates to the incorporation of a turntable which is rotatable through discrete steps rather than being subject to a resilient bias.
According to the third aspect, there is provided a sole for footwear comprising a recess, and a turntable mounted for rotation within the recess, said turntable being rotatable through discrete steps in either direction of rotation through a restricted angle at each stepwise rotation.
Although the incorporation of the turntable provides a particularly effective means of preventing injuries arising from twisting or turning movements, to a limited extent the action of the turntable may be achieved by alternative means which provide a similar function to the action of the turntable. Although such means a
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Freed Yariv Gary
Goldberg Jack
Seddon Jon
Mohandesi J.
Rotasole Pty. Ltd.
Sewell Paul T.
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