Abstract: A tonneu cover assembly mountable to a open top truck bed of a pick up truck for covering the bed. The cover assembly includes a pair of side rail caps that are attachable to the side rails of the bed by a clamping system. A pair of door panels are hingedly mounted on respective side rail caps. The door panels are rotatable between a closed position where the bed is covered and open positions permitting access to the bed. A pair of actuators are connected to respective door panels and are operable to rotate the door panels between the closed and open positions. The actuators may operate to rotate one door more quickly than the second when opening the doors, and then reverse the speed of the doors when closing them enabling correct engagement between the inward sides of the doors. A quick release mechanism is provided to decouple a door from an actuator in case of a failure.

Abstract: A tonneu cover assembly mountable to a open top truck bed of a pick up truck for covering the bed. The cover assembly includes a pair of side rail caps that are attachable to the side rails of the bed by a clamping system. A pair of door panels are hingedly mounted on respective side rail caps. The door panels are rotatable between a closed position where the bed is covered and open positions permitting access to the bed. A pair of actuators are connected to respective door panels and are operable to rotate the door panels between the closed and open positions. The actuators may operate to rotate one door more quickly than the second when opening the doors, and then reverse the speed of the doors when closing them enabling correct engagement between the inward sides of the doors. A quick release mechanism is provided to decouple a door from an actuator in case of a failure.