Derailment detector
First Claim
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.
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Accused Products
Abstract
A derailment detector for a railway vehicle includes a housing in selective fluid communication with a brake pipe of the railway vehicle to receive compressed air from a pneumatic braking system. A main chamber is disposed within the housing and pressurized by the compressed air. A shock detection assembly is adapted for detecting an acceleration indicative of a derailment condition and activating a main valve disposed within the main chamber upon detection of the acceleration indicative of the derailment condition. A discharge valve is in selective fluid communication with the main chamber, where, upon detection of the acceleration indicative of the derailment condition, the discharge valve is operative for discharging a predetermined amount of the compressed air from the main chamber to indicate that the derailment condition has occurred.
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Citations
19 Claims
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1. A derailment detector for a railway vehicle, the derailment detector comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A derailment detector comprising:
a discharge valve adapted to discharge a predetermined percentage of full operating brake pipe pressure of a railway vehicle in response to a detection of an acceleration indicative of a derailment condition, but not release a percentage of the full operating brake pipe pressure sufficient to affect braking of the railway vehicle. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of detecting a derailment condition in a railway vehicle and indicating the occurrence of the derailment condition, the method comprising the steps of:
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pressurizing a derailment detector with compressed air; detecting an acceleration indicative of the derailment condition; and discharging a predetermined percentage of full operating brake pipe pressure of the compressed air from the derailment detector to indicate the occurrence of the derailment condition, but not release a percentage of the full operating brake pipe pressure sufficient to affect braking of the railway vehicle. - View Dependent Claims (18, 19)
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Specification