Convertible rail-highway semi-trailer fluid suspension
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United States of America Patent
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-
Aug 3, 1982
Grant Date -
N/A
app pub date -
Feb 28, 1980
filing date -
Feb 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rail bogie air suspension for a convertible rail-highway semi-trailer using an invaginating air bag secured between an upper air chamber member affixed to the underside of the rear frame of a vehicle and a load support leg assembly, a bumper carried by said upper air chamber member, a plate and shaft assembly spring urged towards said bumper and a pneumatically operable pin supporting said plate and shaft assembly whereby, when air is vented from the bag, air pressure is simultaneously provided which acts on a member that retracts the pin and allows the bumper plate and shaft assembly to move past the pin under the weight of the vehicle to allow the entire assembly to fully retract for the proper elevated stored position of the bogie during the highway mode.
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