Prosthetic ankle joint mechanism
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United States of America Patent
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Jun 19, 2018
Issued Date -
N/A
app pub date -
Aug 3, 2016
filing date -
Dec 14, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A self-aligning prosthetic foot and ankle assembly has an ankle unit pivotally mounting a foot component. The ankle unit contains a hydraulic piston and cylinder assembly having a piston which is linearly movable within a cylinder. The axis of the cylinder is coincident with a shin axis defined by a shin connection interface on the ankle unit. Bypass passages containing damping resistance control valves provide continuous hydraulic damping of dorsi and plantar ankle flexion, the unit being such that, over the major part of the range of damped movement, there is no resilient biasing in either the dorsi or the plantar direction. This confers a number of advantages, including stabilization of standing, balance control, and improved stair-walking and ramp-walking.
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