MODULAR CPR ASSIST DEVICE Abstract Disclosed herein is a system for performing chest compression for cardiopulmonary resuscitation. The system includes a motor (41) including a system of clutches (51) and brakes (45, 53) which allow for controlling and limiting the movement of the compression mechanism and includes a control system for controlling the operation 5 and interaction of the various components to provide for optimal automatic operation of the system. [R:\LIBFJ51669.doc:PJM