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US 4,289,122 AGranted
Ankle-foot orthosis
OwnerRandy D. F. Mason, William Vuletichinventors
Life of this patent
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Abstract
An ankle-foot orthosis made of thin-sheeted polypropylene material which comprises a foot section and a leg section articulately attached to one another on each side of the ankle in order to facilitate dorsi-flexion. The leg section has a flanged lower lip overlapping the upper edge of the foot section. The overlap provides a stop for the backward movement of the leg section around the articulation point, thus limiting plantar flecion and foot drop.
Claims4
An ankle-foot brace securable to a patient's leg for controlling the ankle movement which comprises:
- a unitary plantar element made of hard, thin-sheeted material having an upward projection shaped and dimensioned to wrap intimately around the heel and ankle area;
- a unitary leg element made of hard thin-sheeted material having an upper portion shaped and dimensioned to wrap intimately around the calf, a shank extending downward from said upper portion along the back of the lower leg, a broadening lower portion at the lower end of said shank partially extending over said projection and over both sides of said ankle area, and means for securing said upper portion to the leg;
- means for pivotally attaching the upward projection of the plantar element to the broadening lower portion of the leg element at ankle level about the normal flexure axis of the ankle;
- and
- means integral with said plantar element and said leg element for limiting the backward movement of the leg element in relation to the plantar element.
2 more elements
Dependencies are inferred from the claim text.