RAILWAY VEHICLE LOAD BRAKE VALVE WITH PROGRESSIVE ELASTICITY CHARACTERISTIC Russian patent published in 2011 - IPC B60T8/18 B61H13/30 

FIELD: transport.

SUBSTANCE: invention relates to railway transport vehicles, namely, to load brake valves. Brake valve comprises first piston with piston first rod whereon pressure C acts in brake pneumatic drive and several second pistons with piston second rod whereon one or several preliminary control pressures C_v act, piston rods interacting with bolster beam actuating inlet valve V_in and outlet valve V_out. Inlet valve V_in communicates compressed air vessel R with braking cylinder or shuts off said line. Outlet valve V_out communicates braking cylinder with atmosphere 0 or shuts off said line. Bolster beam is brought in contact with support. Position of the latter may be varies by third piston. Third piston is loaded by weight-dependant pressure T on one side and, on the other side, by pressure spring. Said pressure spring features progressive elasticity characteristic that provides for linear characteristic of brake load valve.

EFFECT: perfected design to allow for linear characteristic of brake valve without extra appliances.

6 dwg