Boots – shoes – and leggings – Soles – Cushion
Patent
1988-11-08
1990-06-26
Watkins, Donald
Boots, shoes, and leggings
Soles
Cushion
36 29, 36102, A43B 1318, A43B 732
Patent
active
049360302
ABSTRACT:
This invention relates to a shoe having a mechanism in its sole to transmit the mechanical energy of heel impact to the front of the foot, where it is stored and then released during thrust. The mechanical energy of the impact on the rest of the foot (in front of the heel) is also stored and then released during thrust. The shoe is energy-efficient in that it returns as much of the energy of impact as possible to the runner during thrust. This means that the leg and foot muscles do not have to do as much work to lift the body weight against gravity. In addition to this resiliency feature, there is a compliance feature which reduces the impact shock on the runner's skeleton, muscles, and tendons. This compliance is achieved because the foot impact force is transmitted to the upper skeleton through a spring, which softens the shock transmitted to this upper skeleton.
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