Some improvements in the suspension of the wheels, not guidelines in tractors trucks and trailers (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the suspension of the wheels, not guidelines, in tractors, trucks and trailers, which are essentially characterized by having on each side of the chassis and on each support, two separate twin wheels, joined by a common shaft supported by a central bearing, whose box forms, in addition, the bearing for another axis orthogonally crossed with the first and subject to each end in the chassis, so that the set of the two wheels, with their common bearing, can rotate angularly, around the axis parallel to the crossbar of the chassis, or what is the same, oriented according to the direction of the vehicle. (Machine-translation by Google Translate, not legally binding)