An armover clamp assembly comprising: a housing (1, 2); an actuator; a cam having a cam slot disposed therethrough is attached to the actuator for linear movement inside the housing (1, 2); wherein the cam slot has a cam path a first link movably coupled to the cam slot via a cam pin coupled to the link; wherein the cam pin is disposed in and configured to follow the cam path; a pivot pin coupled to the first link at a position spaced apart from where the cam pin is coupled to the first link; and, a driver that is pivotally attached to the pivot pin, characterised in that the assembly further comprises: a rotating pin that extends exterior of the housing (1, 2) and is attached to the driver interior of the housing (1, 2) at a location spaced apart from the pivot pin; and an arm that is attached to the rotating pin exterior of the housing (1, 2) and rotatable when the actuator linearly moves the cam which causes the cam pin to follow the cam path moving the first link which moves the driver via the pivot pin to rotate the rotating pin, and in that the cam path includes a locking portion and an extended travel portion, wherein the locking portion of the cam path includes a linear surface along which the cam pin travels to cause the arm to be capable of closing on a workpiece with a constant force; and, wherein the extended travel portion of the cam path is angularly oriented with respect to the locking portion so that when the cam pin enters the extended travel portion, it provides rotation of the arm. a housing (1, 2); an actuator; a cam having a cam slot disposed therethrough is attached to the actuator for linear movement inside the housing (1, 2); wherein the cam slot has a cam path a first link movably coupled to the cam slot via a cam pin coupled to the link; wherein the cam pin is disposed in and configured to follow the cam path; a pivot pin coupled to the first link at a position spaced apart from where the cam pin is coupled to the first link; and, a driver that is pivotally attached to the pivot pin, characterised in that the assembly further comprises: a rotating pin that extends exterior of the housing (1, 2) and is attached to the driver interior of the housing (1, 2) at a location spaced apart from the pivot pin; and an arm that is attached to the rotating pin exterior of the housing (1, 2) and rotatable when the actuator linearly moves the cam which causes the cam pin to follow the cam path moving the first link which moves the driver via the pivot pin to rotate the rotating pin, a rotating pin that extends exterior of the housing (1, 2) and is attached to the driver interior of the housing (1, 2) at a location spaced apart from the pivot pin; and an arm that is attached to the rotating pin exterior of the housing (1, 2) and rotatable when the actuator linearly moves the cam which causes the cam pin to follow the cam path moving the first link which moves the driver via the pivot pin to rotate the rotating pin, and in that the cam path includes a locking portion and an extended travel portion, wherein the locking portion of the cam path includes a linear surface along which the cam pin travels to cause the arm to be capable of closing on a workpiece with a constant force; and, wherein the extended travel portion of the cam path is angularly oriented with respect to the locking portion so that when the cam pin enters the extended travel portion, it provides rotation of the arm.