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https://drivepatents.com/patents/942345 · 1 Jun 2016
A chassis with variable track, particularly suited to agricultural machinery and equipment with at least four wheels, all or partly steered and all or partly driven, characterized in that it comprises a central horizontal frame, rectangular in plan view, w...
https://drivepatents.com/patents/994644 · 26 Dec 2012
The shaft (20) has a wheel (22) movably rotated around a rotational axis (Y22) with respect to a shaft (37). A structure element (12) defines a reference plane (P2) approximately parallel to ground when the wheel rests on the ground. A swiveling system (24...