A trailer dolly for joining a trailer to a towing vehicle has a frame mounted on an axle for a pair of wheels. The frame supports a hitch ball assembly that is positionable on the frame for allowing the tongue-weight of a towed trailer that is coupled to the hitch ball to be shifted from a position over the wheels of the dolly to a position that increases traction of the wheels of the towing vehicle.
Trailer dolly
2017-06-13
Patent
Electronic Resource
English