Internal lift axle suspension system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 4, 1986
Grant Date -
N/A
app pub date -
Jan 20, 1982
filing date -
Jan 20, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Provided is a lift axle suspension system employing an extendible air chamber in which the lifting mechanism is located. The mechanism for lifting the vehicle's wheels out of road engagement includes a spirally coiled spring connected to a reel having a cable wrapped around it. The unwrapped end of the cable is connected to the vehicle and the reel is connected to the suspension. When air is supplied to the air chamber it extends, lowering the wheels into road engagement. In doing so, the chamber acts against the normal bias of the spirally coiled spring, playing out the cable as the reel rotates. Release of air from the chamber causes the bias of the spring to automatically rotate the reel in the opposite direction which in turn takes up the cable and raises the wheels from the road surface. Preloading of the spring serves to hold the suspension firmly in its riding position. The predetermined length of cable to be played out serves as a stop or shock absorber against over-extension of the air chamber.
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