Dual area metering valve with variable reaction assembly

Details Dual area metering valve with variable reaction assembly Dual area metering valve with variable reaction assembly

B - Operations, Transporting

60

T

303/80

B60T 17/04 (2006.01) B60T 15/46 (2006.01)

Patent

CA 1191524

ABSTRACT OF THE DISCLOSURE The invention relates to a service brake system for towed vehicles and particularly to a service brake system for double trailer combinations and a metering relay valve therefor. According to the invention, a variable reaction amplifying relay valve, controlled by service brake control line pressure, meters reservoir pressure from the leading trailer to the service brake control line in the the ailing trailer . Below a predeter- mined pressure, the metering relay valve provides an am- plified pressure output relative to input. Above this predetermined point, the output pressure is sub- stantially one-to-one.

386697

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