B62D61/00
Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern
B62D61/00
Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern
B62D61/12
with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels
B62D61/12
with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels