Patent ID: 7309320

Claim:
An apparatus for receiving and supporting respective femoral and tibial portions of a person's leg and flexing the knee joint thereof comprising: (a) a pair of elongated femoral and tibial support members each being pivotally connected to the other at one end, said femoral support member at its opposite end being pivotally mounted at a fixed position on a base and said tibial support member at its opposite end having a drive connection; (b) a first rigid cantilevered cradle mounted on said femoral support member for reciprocally moving alongside, lengthwise of and along a path parallel to and outwardly of said femoral support member and adapted while so moving for supporting said femoral portion of said leg; (c) a second rigid cantilevered cradle mounted on said tibial support member for reciprocally moving alongside, lengthwise of and along a path parallel to and outwardly of said tibial support member and adapted while so moving for supporting said tibial portion of said leg; and (d) a drive source connected to said tibial support member drive connection and operative for cyclically reciprocating said drive connection and thereby forcing said support members to cyclically contract and expand around the axis of the said pivotal connection therebetween and in coordination therewith to flex said knee joint; and wherein said cradles in response to and during said contraction and expansion reciprocate each along its respective said path as required to maintain the respective femoral and tibial portions in substantially fixed positions on said respective cradles.