DISPOSITIVO PER COMANDARE L INNESTO E O L INVERSIONE DELLA MARCIA IN CAMBI DI VELOCITA A RUOTE DENTATE PER AUTOVEICOLI

摘要

Pressure fluid control for a transmission. There is provided a pressure fluid control device for a transmission, particularly applicable to use in fork lift trucks, wherein a suitable hydraulic selector receives pressure medium from a pressure creating device such as a pump and directs same through a pressure regulating valve to a selected one of the transmission clutches or couplings. Particularly the pressure regulating valve is arranged in a rotary slide valve of the hydraulic selector and is arranged to respond to a piston energized by brake pressure fluid. Thus by the use of very simple apparatus the first portion of a brake pedal movement is utilized to disengage a transmission.