B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/24
B60T 17/00 (2006.01) B60T 8/18 (2006.01) B60T 17/12 (2006.01)
Patent
CA 1225112
ABSTRACT OF THE DISCLOSURE Brake apparatus for a railway vehicle including a brake cylinder device of the type having a pair of interconnected pistons of unequal size to which the vehicle brake rigging is connected. The larger power piston forms an application chamber and a release chamber on its opposite sides in which air is stored for use in controlling the vehicle brakes. The release chamber air is vented to atmosphere during a brake application by way of an empty/load brake control valve device including a changeover valve and a pressure sensitive check valve. When the vehicle is empty, the release chamber air is vented by way of the check valve, which limits the maximum reduction of release chamber pressure and accordingly stab- fishes the maximum empty vehicle brake force obtained. A load piston biases the check valve with application chamber air, which is charged from the brake pipe so that the check valve bias and consequently the maximum reduction of release chamber pressure reflects the train charge. The empty/load control is protected against false transitions of the change- over valve due to car jounce and rock by a delay choke and an exhaust shut-off valve in parallel with the foregoing check valve and changeover valve.
455629
American Standard Inc.
Fetherstonhaugh & Co.
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