Prosthetic foot

Details Prosthetic foot Prosthetic foot

1976-12-27

1978-05-30

Frinks, Ronald L.

A61F 108

Patent

active

040914720

ABSTRACT:
The foot comprises a keel of hard material such as wood and having a flat attachment surface, a curved instep portion and a planar diminished heel portion. Recesses are formed above and below the front ends of the toe portion and a resilient reinforcing tongue portion is secured within each recess. These tongues extend forwardly of the keel and are connected together with a relatively dense foamed plastic therebetween so that the resistance of the tongues and of the plastic controls the flexural resistance of the toe portion. The shape of the heel portion permits the maximum amount of foam possible to be provided at the heel so that the density of the heel is variable and controllable by the foaming process. The final foam process envelopes the keel with the exception of part of the flat top, in one-piece moulded rubber or synthetic plastic foam so processed as to produce a skin on the exterior surface. The thickness of foam at the rear upper area behind the flat upper surface of the keel is relatively small thus preventing any tendency of the keel to separate from the foam at this point.

REFERENCES:
patent: 616873 (1899-01-01), Andrews
patent: 3098239 (1963-07-01), Nader
patent: 3484871 (1969-12-01), Orange
patent: 3766569 (1973-10-01), Orange
patent: 3833941 (1974-09-01), Wagner

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