Patent ID: 6269916
Filing Date: 2001-08-07
Classification: B60T,B61H,F16D

Abstract:
A brake cylinder for use in a railway vehicle braking system comprising:(a) a cylindrical casing engageable with such railway vehicle braking system;(b) a hollow piston assembly mounted for reciprocal movement within said cylindrical casing, said hollow piston assembly having a hollow portion defined by a back wall and at least one sidewall;(c) a small piston assembly positioned within said hollow portion, said small piston assembly including a first surface facing said back wall and a peripheral edge portion for sealingly engaging an inner surface of said at least one sidewall;(d) a first space defined by said back wall of said hollow portion, at least a portion of said inner surface of said at least one sidewall and said first surface of said small piston assembly;(e) first fluid communication means in fluid communication with said first space for supplying fluid pressure within said first space during a brake application of such railway vehicle braking system resulting in movement of said hollow piston assembly away from said small piston assembly and for evacuating fluid pressure from said first space during a brake release of such railway vehicle braking system resulting in movement of said hollow piston assembly toward said small piston assembly; and(f) a piston rod assembly having a first end and a second end, said first end being connected with said hollow piston assembly and said second end being engageable with brake rigging of such railway vehicle such that movement of said piston rod assembly in an outward direction during such brake application initiates a braking sequence of such railway vehicle braking system.