ARTIFICIAL KNEE JOINT WITH A PUSH ROD BIASED TO ROTATE A PROSTHETIC LOWER LEG RAPIDLY TO ALIGN WITH A RESIDUAL THIGH
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United States of America Patent
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Feb 8, 2005
Grant Date -
Feb 24, 2005
app pub date -
Aug 18, 2003
filing date -
Aug 18, 2003
priority date (Note) -
Granted
status (Latency Note)
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Abstract
An artificial knee joint includes a joint seat, a support frame, a hydraulic device, a push rod, and a biasing member. The joint seat has a joint body and a rotatable member connected pivotally to the joint body and connected fixedly to a residual thigh. The support frame is connected rotatably to the joint body, and is connected fixedly to a prosthetic lower leg. The push rod is movable relative to the joint body between an extended position, where a free end of the rotatable member is spaced apart from the joint body to align the lower leg with the thigh, and a retracted position, where the free end of the rotatable member abuts against the joint body. The biasing member biases the push rod to the extended position.
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