Footwear incorporating piezoelectric spring system

Details Footwear incorporating piezoelectric spring system Footwear incorporating piezoelectric spring system

1998-08-20

1999-07-06

Dougherty, Elizabeth L.

Measuring and testing

Orthopedic pressure distribution

36136, A61B 500

Patent

active

059185023

ABSTRACT:
An article of performance enhancing footwear having a piezoelectric spring apparatus in the sole member. Walking or running applies a first force deforming a piezoelectric actuator, thereby generating electrical energy. An energy storage circuit stores electrical energy generated by the piezoelectric actuator. Sensing means is provided to sense the release of a second force greater than the first force, which triggers the release of stored electrical energy back into the piezoelectric actuator. The resulting deformation of the piezoelectric actuator imparts a force into the bottom contact surface of the sole member.

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patent: 5632841 (1997-05-01), Hellbaum et al.
patent: 5714706 (1998-02-01), Nakada et al.
patent: 5746499 (1998-05-01), Ratcliffe et al.
patent: 5765300 (1998-06-01), Kianka
patent: 5797201 (1998-08-01), Huang

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