Pipe joints or couplings – Packed – Socket
Reexamination Certificate
2008-06-06
2011-12-13
Bochna, David E (Department: 3679)
Pipe joints or couplings
Packed
Socket
C285S110000, C137S614040, C277S615000, C277S648000
Reexamination Certificate
active
08075025
ABSTRACT:
A crown-type probe seal for a female hydraulic coupling member has one or more pressure-energized seals for sealing between the probe seal and the body of the coupling member which retains the probe seal. The generally ring-shaped probe seal has one or more annular fluid chambers in the wall of the seal's body. Each annular fluid chamber is open to the outer circumference of the probe seal. Hydraulic fluid under pressure may enter an annular fluid chamber through its opening and exert a generally radial force as a result of a pressure differential. This radial force can act to increase the sealing effectiveness of the probe seal both to the body of the coupling member retaining the probe seal and to the probe of a male coupling member inserted in the receiving chamber of the female member.
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Bochna David E
National Coupling Company Inc.
Wong, Cabello, Lutsch, Rutherford & Brucculeri L.L.P.
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