Dual circuit braking system employing single load sensing valve in one circuit and relay valve in other circuit
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United States of America Patent
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-
Dec 2, 1980
Grant Date -
N/A
app pub date -
Nov 24, 1978
filing date -
Nov 16, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid-pressure operated dual circuit braking system in which each circuit serves a rear axle brake and at least one front axle brake, one circuit only including a load sensing valve. The braking pressure in the other circuit is controlled by a relay valve in response to the modulated pressure from the load sensing valve. The relay valve includes a piston which is normally balanced but moves in the event of a failure in the circuit embodying the load sensing valve, to connect the unmodulated pressure in the relay valve circuit directly to the rear axle brakes.
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