The first end of the spring can be attached to the upper link of the parallelogram linkage.

Four elements (9a, 9b, 11a, 11b) are mutually articulated as a parallelogram deformable according to four parallel axes (A1, ...A4).

The adjustable support arm can comprise a lower bracket connected to an upper bracket by a parallelogram linkage.

The device comprises guiding means (14) whereon is mounted the first gripping member (32), said guiding means being a single-piece linking member forming a deformable parallelogram.

A real technological gem, the Dual Tilting Wheels (DTW) front axle is composed of a dual triangulation deformable parallelogram, whose precision mechanic-style architecture enables the centre of gravity to be lowered and mass to be better centred.