Hydraulic isolation valve for railway vehicle

Fluid-pressure and analogous brake systems – Flow retarder – Isolation valve

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303 963, B60T 1132

Patent

active

051412934

ABSTRACT:
An isolation valve device for a hydraulic brake system of a railway vehicle including passageways via which hydraulic pressure communication is established between a pressure controller and the brake units of each truck of a railway vehicle, and a bore to receive a pair of piston valves adapted to interrupt hydraulic pressure communication in a respective one of the passageways leading to the different truck brake units, when a pressure differential occurs therebetween, due to a ruptured brake line at one of the trucks, for example, causing a hydraulic fluid leak thereat.

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patent: 2931178 (1960-04-01), Straus
patent: 2960102 (1960-11-01), Margida
patent: 3107681 (1963-10-01), May
patent: 3473851 (1969-10-01), Neves
patent: 3753601 (1973-08-01), Hensley
patent: 4159755 (1979-07-01), Kang et al.
patent: 4281880 (1981-08-01), Gaiser
patent: 4422694 (1983-12-01), Schopper et al.

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