Prosthetic foot

a technology for prosthetic feet and feet, applied in the field of prosthetic feet, can solve the problems of mechanical failure and wear low dynamic response capability of conventional prosthetic feet, and high production and maintenance costs of known prosthetic feet, so as to reduce residual limb to socket shear forces, improve the foot, and improve the effect of foo

Inactive Publication Date: 2002-06-27
BIOQUEST PROSTHETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a prosthetic foot with a triplanar motion capability that improves the foot's stability and reduces the forces on the residual limb. The foot has a longitudinal arch with a concavity that creates frontal and sagittal plane motion capabilities, with the medial aspect of the arch having a higher dynamic response capability. The forefoot portion of the foot has an expansion joint hole and plural expansion struts that create improved biplanar motion capability. The prosthetic foot mimics the human foot with dynamic response and motion capabilities.

Problems solved by technology

The technical problem addressed in this patent text needs to be identified by a senior R&D personnel who has read it through.

Method used

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Examples

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Embodiment Construction

[0027] Referring now to the drawings, a prosthetic foot 1 of the invention comprises a body 2 formed of a resilient, semi-rigid material, plastic in the disclosed embodiment, which is formed with forefoot, midfoot and hindfoot portions 2A, 2B and 2C, respectively. A cosmetic covering 3 of the foot surrounds the body 2 as depicted in FIG. 2. The body 2 in the disclosed embodiment is formed by molding or by pouring the material of the body into a negative mold. However, other processes could be employed to form the body 2 such as machining the body from a solid piece of resilient, semi-rigid material, or by using a combination of molding and machining, for example. The plastic of body 2 is an elastomer, polyurethane in the illustrated example but other plastics or composite materials could be used. The body 2 of the foot is shaped and designed to simulate a human foot's hindfoot triplanar, forefoot biplanar and hindfoot, midfoot and forefoot dynamic response windless effect motion cap...

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PUM

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Abstract

A prosthetic foot is disclosed for improving the gait and comfort qualities of the amputee that participates in walking, running and jumping activities. The prosthetic foot allows hindfoot triplanar motion and has hindfoot, midfoot and forefoot dynamic response, and midfoot and forefoot biplanar motion capabilities. An ankle joint and a subtalar joint provided in the hindfoot permit closed kinetic chain motion of the foot. The ankle and subtalar joints are preferably formed integrally with the hindfoot by respective struts of resilient material of the hindfoot. An arch in the midfoot creates frontal and sagittal plane motion capabilities. The forefoot includes at least one expansion joint hole extending therethrough between dorsal and plantar surfaces. An expansion joint extends forward from the hole to the anterior edge of the forefoot to form plural expansion struts that create improved biplanar motion capability of the forefoot. Concavities and convexities on the surface of the hindfoot, midfoot and forefoot encourage desired motions and motion directions so that the foot functions and feels like a normal foot to the amputee. The forefoot, midfoot and hindfoot portions can be inexpensively formed from a single piece of resilient material such as a semi-rigid plastic as by molding or machining.

Description

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Claims

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Application Information

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Owner BIOQUEST PROSTHETICS
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