David Moser,Fadi Abimosleh,Mir Saeed Zahedi,Graham Harris,Stephen Terry Lang,Andrew Sykes
申请号：
US11956391
公开号：
US08574312B2
申请日:
2007.12.14
申请国别(地区):
US
年份:
2013
代理人:
摘要：
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 stabilisation of standing, balance control, and improved stair-walking and ramp-walking.
