F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
F01B2250/00—Accessories of steam engines; Arrangements or control devices of pumps, compressors or condensers, insofar as they influence the functioning of the steam engines
F01B2250/004—Devices for draining or idling of steam cylinders or for uncoupling piston and connecting rod
Circuit destine a etre dispose entre une conduite pneumatique et un cylindre de frein de vehicule ferroviaire pour piloter la pression regnant dans ledit cylindre, et valve de barrage pour ce circuit