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

1980-11-13

1982-10-19

Reger, Duane A.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 40, B60T 1502

Patent

active

043547133

ABSTRACT:
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 trailing trailer. Below a predetermined pressure, the metering relay valve provides an amplified pressure output relative to input. Above this predetermined point, the output pressure is substantially one-to-one.

REFERENCES:
patent: 3001831 (1961-09-01), Stelzer
patent: 3411836 (1968-11-01), Dobrikin et al.
patent: 4076325 (1978-02-01), Bray
patent: 4090738 (1978-05-01), Bray

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