Lift axle air pressure transfer control apparatus

Details Lift axle air pressure transfer control apparatus Lift axle air pressure transfer control apparatus

2005-01-25

2005-01-25

English, Peter C. (Department: 3616)

Land vehicles

Body elevation or tilt

Establishing riding or trim height

C280S086500, C280S124160, C180S024020

Reexamination Certificate

active

06845989

ABSTRACT:
A lift-type axle/suspension system of a heavy-duty vehicle includes ride air springs for providing vehicle load support when the system is lowered, and one or more lift air springs for selectively raising the system when such additional load support is unnecessary or when greater vehicle maneuverability is desired. An apparatus integrates and simultaneously controls the operating systems for the lift and ride air springs. The control apparatus includes a plurality of conduits and valves which enable pressurized air from the lift air springs to be rapidly provided to the ride air springs when the system is being lowered. The additional air supplements the normal source of air from the vehicle compressed air source to ensure sufficient and timely air for smooth and efficient operation of the ride air springs without excessive buckling or folding, thus maintaining adequate overall vehicle air pressure needed for operating other vehicle components.

REFERENCES:
patent: 4854409 (1989-08-01), Hillebrand et al.
patent: 5018755 (1991-05-01), McNeilus et al.
patent: 6398236 (2002-06-01), Richardson
patent: 0 950 602 (1999-10-01), None
patent: 2 083 456 (1971-12-01), None
patent: WO 9205970 (1992-04-01), None

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