Load-sensing valves

Fluid-pressure and analogous brake systems – Load control – Responsive to fluid pressure spring

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Details

188195, B60T 818

Patent

active

041439244

ABSTRACT:
A load-sensing valve for an air pressure braking system comprises a diaphragm responsive to a signal pressure, as from a brake valve, and actuating through a rockable beam a two stage valve for controlling flow of pressure air to the brakes, the beam fulcrum being displaceable in accordance with vehicle load, and a further diaphragm having operable connection with the two-stage valve and responsive to delivery pressure, the two-stage valve consisting of a pilot valve operable alone where air usage is small to provide high sensitivity and a main inlet valve which is brought into operation with increased inlet pressure and larger air flow.

REFERENCES:
patent: 2099428 (1937-11-01), Logan, Jr.
patent: 3330604 (1967-07-01), Schultz et al.
patent: 3631894 (1972-01-01), Frantz
patent: 3862782 (1975-01-01), Horowitz et al.

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