Fluid pressure operable tractor and trailer vehicle braking syst

Details Fluid pressure operable tractor and trailer vehicle braking syst Fluid pressure operable tractor and trailer vehicle braking syst

1978-07-21

1981-03-31

Frankfort, Charles E.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 9, B60T 1300

Patent

active

042589592

ABSTRACT:
A tractor/trailer vehicle fluid pressure braking control system enabling two line control of trailer service and secondary braking includes for tractor braking a service brake control valve for controlling the fluid pressure applied both to service brake actuators and to a trailer service brake control line, a secondary control valve which controls the magnitude of a counteracting pressure applied to tractor spring brakes and also to a relay valve which controls a pressure in a trailer secondary spring brake control line.

REFERENCES:
patent: 3228730 (1966-01-01), Schubert
patent: 3666324 (1972-05-01), Page
patent: 3718372 (1973-02-01), Gruner
patent: 3820854 (1974-06-01), Stearns
patent: 3929381 (1975-12-01), Durling

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