Abstract: A mechanism temporarily convert the front wheel of bicycles into a driving wheel, comprising a lever (5) hinged in front of and on top of the frame; the handlebar (E) is fixed to the lever together with a catch (14), with a mobile stopping tooth which cooperates with stopping means (11, 15) attached to the steering column (10), to block/release the handlebar which can be swung on a vertical plane; a transmission assembly, comprising a chain (7) which engages a free wheel (8) coaxial and fixed to the front wheel (I), transmits the alternate movement given to the handlebar to the free wheel; elastic return means for returning the handlebar to the original position are also provided. Control means (16, 17) for the stopping tooth of the catch (14) are attached to the handlebar.

Abstract: The present invention is a transportable hoist consisting of a twin-arm telescopic unit comprising a given number of rectangular telescopic elements, which can be extended longitudinally by means of a telescopic hydraulic cylinder. A carriage with a work platform is mounted on said twin-arm unit; the carriage and work platform are moved along the unit by means of two steel cables connected to a windlass. The carriage is equipped with an automatic emergency brake. The twin-arm unit is supported by a pivoting platform mounted on a self-propelled or towed vehicle. Two telescopic cylinders are used to set the angle of said unit during use.