Valve, a protection relay against overloads for brakes of the service and a spring collected combined, 2004, in particular roads, 2004.

摘要

The invention relates to a valve, a protection relay against overloads for brakes of the service and a spring of accumulation combined, 2004, in particular roads. / p & & p & the piston of the relays 22, 2222 2222), constitutes the front and at the rear as a piston stage, present in addition to its own, at the front two active surfaces 26 and 29 each partial conjugated with a control chamber 27 and 30 and, at the rear, two other surfaces of the active part 31, 32 separated by a disk with a section 45. / p & & p & the active surfaces partial 26, 29 are the relative values desired in order to obtain, by an increase or reduction provided for, a setting in function of the pressure of releasing the brakes determined by the battery of a spring.