Patent
1983-03-01
1985-02-19
Apley, Richard J.
3 30, 3 6, A61F 104
Patent
active
044996136
ABSTRACT:
An ankle joint enabling an amputee to walk more naturally with better balance and security in which an ankle or like joint is constructed with broad circumferential surfaces so that it will resemble the action of the human ankle when walking. The ankle joint is composed of one cup-shaped member attached to the bottom of the leg sliding over another cup-shaped member attached to the top of a foot. A third cup-shaped member fits over the first cup-shaped member and a bolt extends through the foot and the cup-shaped members to secure them in assembled relation. Lateral sides of the cups are essentially vertically straight preventing any rotary movement about a vertical axis and the bolt has a pivot joint enabling lateral movement of the foot about a front to rear axis. A resilient cushion is mounted on the upper end of the bolt and engages a cavity in the lower end of the leg to cushion and control the articulate movement of the foot in relation to the leg. Also, an adjustable ankle stop is mounted on a forward extension on the leg to engage the foot to provide an effective stop which can be adjusted to compensate for shoes having different heel height.
REFERENCES:
patent: 608812 (1898-08-01), Weller
patent: 1368348 (1921-02-01), Moore
patent: 2617115 (1952-11-01), Ellery
Apley Richard J.
Isabella David J.
Jacobson Harvey B.
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