Andrew DIRKS,Claire PADDOCK,Sean WALKER,John HORNE
申请号：
US16956434
公开号：
US20200323656A1
申请日:
2018.12.20
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A prosthetic knee (10) for a transfemoral amputee has a monocentric rotational joint (20) that rotatably attaches an upper housing (12) attachable to the amputee's residual limb to a lower housing (16) attachable to a below-the knee prosthesis. A locking mechanism (32) disposed in the lower housing (16) has a piston (34) biased in a locked position releasably engaging the upper housing (12) preventing rotation of the rotational joint (20). An unlocking mechanism (32) having a trigger (48) attached to a posterior side of the lower housing (16) by a pair of spaced-apart trigger links (52) is configured to unlock the locking mechanism (32). A piston rod (62) having a first piston-rod end (64) pivotably attached to one of the trigger links (52) has a second piston-rod end (68) pivotably attached to the piston (34). A force applied to the trigger (48) causes the first piston-rod end (64) to pivot counterclockwise driving the piston rod (62) downwardly disengaging the piston (34) from the locked position, allowing rotation of the rotational joint (20).
