Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE331589ApublicationCriticalpatent/BE331589A/xx
B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
B62D53/08—Fifth wheel traction couplings
B62D53/0857—Auxiliary semi-trailer handling or loading equipment, e.g. ramps, rigs, coupling supports