Trailer air dryer with purge during park feature
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United States of America Patent
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Jul 30, 2002
Grant Date -
N/A
app pub date -
May 3, 2000
filing date -
May 3, 2000
priority date (Note) -
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Abstract
An air dryer system for a trailer braking assembly is modified to provide a purge flow when the park brakes are actuated. An air reservoir, either the main air tank or a separate reservoir, is in operative communication with the trailer air dryer. A valve disposed at a supply end of the trailer air dryer selectively vents a purge flow to atmosphere in response to a park brake application. A restricting orifice limits the purge flow through the trailer air dryer to extend the purge time and maximize the removal of moisture from the air dryer.
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