Inertia actuated mechanical device permitting the backing of a trailer without wheel braking.

摘要

1. A device which automatically renders operative the braking system of a towed vehicle having inertia brakes during forward travel and inoperative so that the vehicle can travel in reverse, the device employing a ratchet means permitting of mechanical locking and unlocking of the brake control means, characterized in that it comprises drop weights (1) suspended by means of a lever (5) inside a casing (6) rigid with the towing hook and the inertia of which permits of the movements required for satisfactory functioning of the assembly, and in that the drop weights (1) are connected to one another by at least two parallel spindles comprising a lower spindle (4) serving for articulation on the ratchet (7) and providing for locking or unlocking of the brake control means and an intermediate spindle (3) acting as a travel limiter for the lower ratchet (7).