3- to 5-circuit safety valve with a restriction device, for vehicle braking systems

摘要

The invention relates to the vehicle construction sector. The aim of the invention is to guarantee in a simple manner upon initial filling with a defective circuit or in the event of a defect occurring in a secondary circuit or circuit of a secondary load, that the intact circuits are reliably opened and filled or that pressure equalisation takes place between both main circuits before the opening pressure of a defective secondary circuit or circuit of a secondary load is reached. The features of the invention consist in that, arranged in a 3- to 5-circuit safety valve known per se, which may preferably also be used for high-pressure accumulation with simultaneous pressure reduction to working pressure and which comprises a known 2-circuit safety valve and the allocation of a further known 1- to 3-circuit safety vale, are associated valve restriction holes, which are closed by sealing seats and, by virtue of pressure graduation and a certain mechanical coupling, guarantee the following opening sequence: <P>ö 23-25 > <P>ö 21-22 > <P>ö 23-25 IDENTICAL <IMAGE>