Spring-applied brake unit for railway vehicle with manual releas

Details Spring-applied brake unit for railway vehicle with manual releas Spring-applied brake unit for railway vehicle with manual releas

1983-01-28

1984-10-23

Butler, Douglas C.

Brakes

Operators

Spring

188202, 188216, 92130A, 92 63, 92116, F16J 110

Patent

active

044783191

ABSTRACT:
A brake actuator device having a pneumatic service brake piston and a spring parking or emergency brake piston operation of either one of which effects displacement of a brake actuator rod which includes a screw-threaded spindle that operates in a non-rotatable nut member in order to adjust the length of the actuator rod. The nut member is provided with an external projection to which the vehicle brakes are mounted. A cogwheel is rotatably fixed to the actuator rod and is normally locked against rotation by a locking pin that engages the cogwheel teeth. The actuator rod is formed in two portions that are connected together through a clutch arrangement, the actuator rod portion having the threaded spindle being free to rotate during brake release to increase the actuator rod length and thereby take up the brake slack. The cogwheel may be manually released following a parking or emergency brake operation to relieve the spring-applied brake force by allowing the threaded spindle to rotate in a direction to decrease the length of the actuator rod and thereby cage the spring.

REFERENCES:
patent: 4063491 (1977-12-01), Roger et al.
patent: 4226168 (1980-10-01), Staltmeir et al.
patent: 4361078 (1982-11-01), Cape et al.

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