Retractable auxiliary bumper for hydraulic or pneumatic railway suspensions
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Mar 11, 2002
filing date -
Mar 11, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An auxiliary suspension for hydraulic or pneumatic railway car suspensions is disclosed. The auxiliary suspension includes a bumper assembly which is located below the railcar body. The bumper assembly further includes a bumper pad that is retracted when a certain level of pressure is present in the hydraulic or pneumatic suspension. In a retracted position, the passenger car has room to 'kneel' at a station platform to align the car floor height with the station platform height. When pressure in the hydraulic or pneumatic suspension is absent, the bumper pad of the auxiliary suspension extends to allow safe operation of the passenger train.
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