Abstract: Valve with a spool for the control of the start and of the stop of a hydraulic motor in which an oblong spool is mobile within an oblong seat obtained in a body, the movement of the spool being controllable in two opposite directions of movement by means of control means, the spool being housed within an intermediate portion of the seat in which the intermediate portion has a section size essentially equal to the section size of the spool, the spool being equipped with at least one intermediate portion with respect to a first end and to a second end with a section size smaller than the section size of the intermediate portion of the seat giving rise to the formation of an interstice intended for the reciprocal connection of at least one first duct and a second duct.

Abstract: Gear-motor with integrated brake for direct drive to the driving-wheel of an electric-traction vehicle where a traction motor is integrated with a gear-reducing device connectable to the driving-wheel of the electric-traction vehicle in correspondence with a hub, where the gear-reducing device is housed into a structural supporting box connectable to the vehicle by means of fixing holes, the traction motor having a supporting casing fixed to the box as a cover, the box and the cover constituting a single structural supporting casing of the gear-motor, where the traction motor is a motor whose transmission shaft is coupled in correspondence of a first pinion of the gear-reducing device or is integral with it and where the motor control inverter is housed in correspondence of the closure head of the motor.