Patent ID: 9139209
Filing Date: 2015-09-22
Classification: B60T,B61L

Abstract:
1. A derailment detector for a railway vehicle, the derailment detector comprising: a housing in fluid communication with a brake pipe of the railway vehicle to receive compressed air from a pneumatic braking system; a main chamber disposed within the housing and pressurized by the compressed air, the main chamber having a main valve; a shock detection assembly adapted for detecting an acceleration indicative of a derailment condition and activating the main valve upon detection of the acceleration indicative of the derailment condition; and a discharge valve in selective fluid communication with the main chamber, wherein, upon detection of the acceleration indicative of the derailment condition, the discharge valve is operative for discharging a predetermined percentage of full operating brake pipe pressure of the compressed air from the main chamber to indicate that the derailment condition has occurred, but not release a percentage of the full operating brake pipe pressure sufficient to affect braking of the railway vehicle.