Ankle block
AssigneeHosmer/Dorrance Corporation
InventorsCecil Thomas Benton, John Maher Freter, Robert R. Moore
Life of this patent
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Abstract
An ankle block for joining a leg prosthesis to a foot prosthesis includes a generally cylindrical member formed of rigid foam material, and a metal or wood insert molded in place in the lower end of the cylindrical member. The insert includes flanges which anchor it firmly in the foam, and a hole extending axially therethrough for receiving and anchoring a bolt from the prosthetic foot. An upper cylindrical passage extends from the upper end of the block to the insert, and a lower cylindrical passage of smaller diameter extends likewise from the lower end. The insert is adapted to receive and anchor either a bolt from a Sach foot, or a tee-bolt from a single-axis foot prosthesis.
Claims2
A prosthetic ankle block comprising a generally cylindrical member contoured to resemble a human ankle and cast of rigid foam material, including an anchoring insert imbedded in said foam material for anchoring a prosthetic foot to said ankle block;
- said insert including an upper cylindrical portion having an upper flange extending radially outwardly therefrom into said foam material, a medial portion comprising a frusto-conical member integrally formed with and subjacent to said upper portion, and a lower flange extending radially outwardly from the lower, narrow end of the medial portion;
- said insert including a hole extending axially therethrough and a counterbore extending into the end surface of the upper portion thereof;
- and said ankle block including an upper passage communicating with said counterbore and a lower passage extending to the lower opening of said hole.
Dependencies are inferred from the claim text.