| 摘要 |
According to the invention, this device comprises, for manoeuvring the crutch or each crutch (1a or 1b), a ball screw (6) - nut (7) assembly, a reversible reducing-gear motor set (11) with a motor brake for turning the screw (6), a manoeuvring crank (12) fitted with reverse-lock means (13), and means controlled by a single lever (16) to disengage the electric motor and couple the screw (6) and the crank (12). <IMAGE> |
