Passive motion apparatus providing a controlled range of motion

The present invention relates to exercise and therapeutic devices and, more particularly, to passive motion devices, i.e., devices which put a passive user through prescribed movements without effort on the part of the user. A passive motion exercise and/or treatment apparatus is provided which includes a main support assembly for supporting at least part of the body of a user of the apparatus. The assembly includes a first support member and a second support member disposed in a common plane. The second support member is pivotably connected to the main support member and is movable relative thereto so as to provide passive movement of a part of the body of a user supported by the second support member relative to a part of the body supported by the first support member. A separable leg support assembly is adapted to be connected, in use, to the main support assembly at either end so as to support the calves of the legs of the user in a plane parallel to, and elevated with respect to, the common plane while the apparatus provides the passive body movement referred to above. A motorized drive arrangement is used to provide the aforementioned relative movement of the second support member.