Some adjustment on new title, that is Knee Joint Therapy Device...
The original or common name is Continuous Passive Motion (CPM)...
Figure below show on the look and design of this device on market nowadays...
I haven't fully discovered the function of this device function yet....
Normally this device used in Rehabilitation and Orthopaedic section for knee recovery...
It is used during the first phase of rehabilitation following a soft tissue surgical procedure or trauma...