Hydraulic coupling
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United States of America Patent
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Jun 14, 2005
Grant Date -
Mar 25, 2004
app pub date -
Sep 24, 2003
filing date -
Sep 25, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved hydraulic coupling includes a fitting and a nut that are threadably connectable together. The fitting includes a generally annular groove having a lateral frusto-conic engagement surface. The nut includes a plurality of elongated fingers that each include a projection having an outwardly-disposed edge. When the coupling is assembled, the edges are frictionally engaged with the engagement surface as a result of the elastic deflection of the fingers. The frusto-conic shape of the engagement surface provides progressively greater frictional resistance in a direction of unthreading of the coupling, whereby loosening of the coupling during operation of the fluid circuit is resisted.
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