Tractor air brake system and control valve means therefor

Details Tractor air brake system and control valve means therefor Tractor air brake system and control valve means therefor

1981-08-07

1984-06-19

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 7, 303 40, B60T 826, B60T 1536

Patent

active

044550529

ABSTRACT:
A tractor air brake system including front wheel brake actuators, rear wheel brake actuators, and control valve structure for controlling the service air pressure delivered to the front wheel brake actuators. When a tractor is equipped with this brake system, the control valve structure operates to vary the service air pressure delivered to the front wheel brake actuators relative to that delivered to the rear wheel brake actuators in order to minimize tractor front wheel lock and loss of steering control when operating a tractor-trailer combination and to provide safe stopping when operating the tractor only.

REFERENCES:
patent: 3190700 (1965-06-01), Fites
patent: 4230373 (1980-10-01), Plantan
patent: 4383717 (1983-05-01), Bueler

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