REGOLATORE DI PRESSIONE DI FRENATURA, IN PARTICOLARE PER UN IMPIANTO DI FRENI IDRAULICI

A brake pressure regulator including an inlet 2 and an outlet chamber 36 separated by an elastomeric valve seat ring 12, which is closable, by a valve plate 8 carried by a valve piston 6. In dependence on the relationship between the diameters d1 and d3, the regulator can be a brake pressure reducer (as shown) or a brake pressure limiter (d3=d1). When the pressure in the inlet chamber is decreased below that in the outlet chamber, the valve seat ring 12 is deformed into the inlet chamber 2 thereby re-opening passage 16 for pressure compensation. Movement of the valve plate 8 is limited by a stop 25 which engages the piston 6. The valve seat ring 12 is fixed between a shoulder 11 and a screwed plug or as shown, a piston is interposed between the ring and the plug 13', the piston being urged towards the ring by the pressure in the other brake circuit to that in which the pressure is regulated, so that upon failure of the other brake circuit the effect of the regulator is neutralized.