Patent ID: 6253886
Filing Date: 2001-07-03
Classification: B60T,B61H

Abstract:
A brake cylinder comprising:a service brake cylinder;a service brake piston mounted in the service brake cylinder and integral with a service brake piston rod;a spring brake cylinder mounted coaxially on the service brake cylinder;a spring brake piston mounted in said spring brake cylinder and on said service brake piston rod, for transmitting a spring brake braking force to the latter; anda plurality of springs arranged around said service brake piston rod, between said spring brake piston and an abutment surface integral with an assembly formed from said service brake cylinder and said spring brake cylinder assembled coaxially, the assembly further comprising a supplementary spring brake release cylinder fitted with an additional annular spring brake-release piston having a brake release piston rod that is movably housed, and in a sealed manner, in the form of an annular sleeve, between an end of said spring brake cylinder and said spring brake piston rod, the spring brake release piston rod being configured to come into annular abutment with the spring brake piston when a brake release pressure is applied to said annular brake-release piston.