SHEATH FOR FLEXIBLE ROTARY SHAFT, DEVICE FOR TRANSMITTING A ROTATIONAL MOVEMENT COMPRISING SUCH A SHEATH, DEVICE FOR ADJUSTING A SEAT HAVING SUCH A MOVEMENT TRANSMISSION DEVICE

摘要

The sheath (1) for a flexible rotary shaft comprises a continuous peripheral wall (5) made of plastic bounding a tubular passage (6) for the shaft, able to be curved but resistant to kinking, the wall (5) comprising a plurality of sections with radial and axial protuberances (10), bounded by two transverse planes and an outer peripheral face (10a) comprising a central part (11) inscribed inside a pseudo cylindrical external central shell (11a) and, at least in the regions that are to be curved, at least one radial and axial protrusion (12), extending axially, projecting from the external central shell (11a) and which, in a transverse plane, is situated in a radial plane and, if appropriate, outside this radial plane but near to it.