Abstract: The device (1) takes up the basic structure and operation of the McKibben type artificial muscles and similar, in which is provided a hollow cylindrical chamber (2), of resilient material, which is inflated in the active phase (K). The chamber (2) interacts with a braided sleeve (3), consisting of threads (31, 32), almost inextensible, arranged in crossed helical paths having a characteristic angle of inclination ? with respect to the longitudinal axis (X) of the device (1). The sleeve (3) is connected at the ends with two rigid head members (4A, 4B) provided to be mechanically connected to external bodies. The invention provides adjusting means (5), associated to said rigid head members (4A, 4B) adapted to vary their distance (D) at rest, so as to require a proportional and consistent change in the angle of inclination ?: if the latter is exactly 54.

Abstract: A robotic limb is described. The robotic limb has a closed tubular casing made of viscoelastic material defining a chamber containing an incompressible fluid. The closed tubular casing has a sheath formed by substantially inextensible intertwined wires. In the chamber there are groups of transverse actuators axially spaced from each other, connected to the sheath and adapted to reversibly contract the closed tubular casing at least partly in the radial direction. The robotic limb also has longitudinal actuators adapted to reversibly contract the closed tubular casing at least partly in the axial direction being connected to each of the groups of transverse actuators.

Abstract: A robotic limb is described. The robotic limb has a closed tubular casing made of viscoelastic material defining a chamber containing an incompressible fluid. The closed tubular casing has a sheath formed by substantially inextensible intertwined wires. In the chamber there are groups of transverse actuators axially spaced from each other, connected to the sheath and adapted to reversibly contract the closed tubular casing at least partly in the radial direction. The robotic limb also has longitudinal actuating means adapted to reversibly contract the closed tubular casing at least partly in the axial direction being connected to each of the groups of transverse actuators.