Fluid pressure operable brake control valve apparatus

Details Fluid pressure operable brake control valve apparatus Fluid pressure operable brake control valve apparatus

1975-06-30

1977-05-24

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Automatic

Equalizing valves

303 81, B60T 1522

Patent

active

040251250

ABSTRACT:
An emergency valve device for a direct release triple valve for use in braking systems is proposed and which for rates of fall of brake pipe pressure below a given rate permits a discharge via a restriction to atmosphere of quick action chamber reference pressure but for higher rates this discharge cannot keep up with the rate of fall of brake pipe pressure and the valve device moves further cutting off the restriction and produces a servo action to operate a vent valve connected to the brake pipe and produce an emergency application by connecting the emergency reservoir to the brake cylinders.

REFERENCES:
patent: 3472561 (1969-10-01), Washbourn
patent: 3716276 (1973-02-01), Wilson et al.
patent: 3731983 (1973-05-01), Washbourn
patent: 3734575 (1973-05-01), Paginton

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