Pipes and tubular conduits – Combined – With end structure
Reexamination Certificate
2008-08-27
2009-06-16
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Combined
With end structure
C138S139000, C138S118000, C285S114000
Reexamination Certificate
active
07546852
ABSTRACT:
The flexible insert for tubing includes an insert for water service tubing or the like that prevents the formation of stress cracks on the tubing when using a compression fitting. The insert is formed, at least in part, from an elongated, resilient, helical coil having opposed first and second ends. In one embodiment, the coil terminates in an enlarged turn or loop at one end of the coil that serves to retain the coil in the tubing. In another embodiment, the coil is butt welded to one end of a short, rigid sleeve having an annular flange at the opposite end. The insert also includes an O-ring and a compression nut.
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Fails Sidney T.
Fails Vickie L.
Brinson Patrick F
Litman Richard C.
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