Railroad net braking ratio valve

Details Railroad net braking ratio valve Railroad net braking ratio valve

1982-02-25

1984-08-14

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Inertia control

303 83, B60T 818

Patent

active

044653239

ABSTRACT:
An empty or loaded railroad brake control device includes a valve adapted to communicate a brake cylinder pressure chamber with a supplemental volume reservoir when the railroad car is not fully loaded. The valve is held in the closed position by a spring, but when a car is less than fully loaded, a load sensing device determines the relative position of the sprung and unsprung portions of the vehicle and transmits this information to the valve which opens to communicate the supplemental volume reservoir with the brake cylinder pressure chamber. The valve includes a pressure release valve, adapted to release the pressure from the supplemental volume reservoir when the brakes are released. An overpressure valve permits partial build-up of the pressure in the brake cylinder before the supplemental volume reservoir is connected.

REFERENCES:
patent: 3338639 (1967-08-01), Carothers
patent: 3341257 (1967-09-01), Weber, Jr.
patent: 3671086 (1972-06-01), Scott

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