Kern Bhugra;Jonathan Smith;Richard R. Marcus;Robert W. Horst
发明人:
Kern Bhugra,Robert W. Horst,Richard R. Marcus,Jonathan Smith
申请号：
US13593366
公开号：
US20120316475A1
申请日:
2012.08.23
申请国别(地区):
US
年份:
2012
代理人:
摘要：
An actuator system for assisting extension of a biological joint is provided with a motor assembly, a rotary-to-linear mechanism, and an extension stop. The rotary-to-linear mechanism includes a screw that accepts rotational output of the motor assembly, and a nut that cooperates with the screw to convert rotational movement of the screw to linear movement of the nut. The extension stop is driven by linear movement of the nut in an extension direction to cause extension of the biological joint. The motor assembly, the rotary-to-linear mechanism and the extension stop cooperate to allow unpowered flexion of the joint. The system is configured without a flexion stop, and is configured such that the nut cannot drive the joint in a flexion direction. Methods of use are also disclosed.
