Fluid pressure operable tractor and trailer vehicle braking systems
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 31, 1981
Grant Date -
N/A
app pub date -
Jul 21, 1978
filing date -
Jun 25, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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