Mounting apparatus for a vehicle-mounted covering system

An apparatus for mounting a covering system to a truck (Fig 1) vehicle with a container (5). The apparatus 30 comprises a linear actuator comprised of a cylinder 62 and piston 64 in which the piston is selectively operable to extend and retract along a substantially linear axis. A telescopic arm 46 is arranged on one side of, and generally parallel with, the linear actuator, the telescopic arm comprising inner and outer elongate members, telescopically arranged, one of which is connected to the piston of the linear actuator by means of a rotatable linkage 66 so that in use the overall length of the telescopic arm can be extended in a direction substantially parallel to the linear axis, between first and second positions, by operation of the linear actuator to move the piston through only part of its stroke. A base member 36 for supporting the vehicle-mounted covering system is also provided which is connected to the linkage 66 so that it may rotate therewith. The telescopic arm comprises a mechanical brake which prevents further extension of the telescopic arm beyond the second position, and in which further extension of the piston is translated by means of the linkage into rotational movement which causes the base member (36, Fig 8) to rotate relative to the telescopic arm.