The device has a flexible shaft (2) and a duct (3) inside which the shaft is placed. The duct is formed of a hollow body made of plastic material and has an inner diameter to permit rotation of the shaft inside the duct. A wall of the body has a variable thickness such that an inner surface (4) of…

The shaft (1) has steel wires (3) helically wound around a brass or copper wire (2). The copper wire has elasticity and resilience characteristics lower than that of the steel wire. The steel wires are arranged to form wire strips (4). The strips are superimposed one above the other around the…

The seat adjuster, comprising at least one slideway (1, 2) with an adjustable fixing member (3, 4), has a drive motor (5) with rotary outputs (6, 7) connected to the fixing members by sleeved transmission cables (8, 9). Each cable sleeve comprises a spiral spring made from a wound metal strip with…