Boots – shoes – and leggings – Boots and shoes – Shoe attachment
Patent
1994-09-22
1996-01-09
Sewell, Paul T.
Boots, shoes, and leggings
Boots and shoes
Shoe attachment
36103, 36105, 36 31, 36 501, 36 586, A43B 1100
Patent
active
054818141
ABSTRACT:
A shoe upper is divided into front and back parts which are hinged together at the shoe sole. The hinge may comprise a creased part of the sole or a mechanical hinge. The parts are held in either an open position or a closed position by a tension spring or a rigid element. The spring and element are pivotally secured to the shoe sole so that their longitudinal axis will be above and extend across the rotational axis of the hinge when the shoe is flat. Additionally, the distance between their points of connection will be less than the corresponding length of sole between said points. This will provide a low stress open position and a higher stress closed position. The stress is created by tension in the spring or by the inherent resilience of the shoe sole counteracting the compression force caused by drawing together the points of connection when a user steps into the shoe.
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Hovet Kenneth J.
Patterson Marie Denise
Sewell Paul T.
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