My mechanism for damping the movement of the windbreaker doors is a rotary oil damper. The damping assembly consist of an oil reservoir with a rotating sweep arm which rotates as the door rotates. As the sweep arm rotates, the oil is displaced through a transfer port to the other side of the sweep arm. The door opening resistance will be dependent on two factors, the viscosity of the oil used, and the position of the restrictor valve, which restricts the flow through the transfer port. The transfer port control valve is either opened or closed to set the desired level of door opening resistance. The control valve screw is accessible during service, so the desired level of resistance can be set within seconds. The system shown utilises a bracket at the top of the glass door (for door type A) to transfer the loads to the oil damper, however for door type B, the rotary oil damper mechanism could potentially replace the lower or upper hinge assembly in either the floor or the ceiling.