Prosthetic foot and keel therefor having progressive stiffening

Details Prosthetic foot and keel therefor having progressive stiffening Prosthetic foot and keel therefor having progressive stiffening

1993-09-30

1996-08-27

Isabella, David

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

Foot

623 55, A61F 266

Patent

active

055497110

ABSTRACT:
A prosthetic foot having a keel formed by a flexible sole plate connected to the lower end of an ankle portion that is attachable to a user's leg or leg prosthesis. A plurality of resilient bending ribs extend from the angle portion to spaced apart locations on the upper surface of the sole plate to resiliently bias the sole plate to a neutral configuration. As the forward portion of the sole plate is progressively loaded, the sole plate flexes causing the bending ribs to deflect until they successively stack up against each other, thereby progressively stiffening the keel.

REFERENCES:
patent: 518658 (1894-04-01), Andrews
patent: 3754286 (1973-08-01), Ryan
patent: 4328594 (1982-05-01), Campbell et al.
patent: 4865612 (1989-09-01), Arbogast et al.
patent: 4892553 (1990-01-01), Prahl
patent: 5116384 (1992-05-01), Wilson et al.
patent: 5152082 (1992-10-01), Culpepper

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