Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate
2006-05-24
2009-11-24
Hewitt, James M (Department: 3679)
Pipe joints or couplings
Particular interface
Tapered
C285S331000, C285S903000
Reexamination Certificate
active
07621567
ABSTRACT:
A sealing device and method for sealing a length of tubing with a fitting is provided, where the sealing device includes at least one sealing surface formed with a plurality of ridges. The ridges include at least one end ridge and at least one internal ridge which are spaced apart by a predetermined distance, and formed with a desired geometry such as U-shaped, V-shaped, or various other shapes and with different sealing faces such as curved or flat. The ridges are spaced apart in a manner to maximize sealing pressure, and produce stress concentrations and localized deformations, in order to create a seal at lower torques or on stiffer tubing or tubing with at least one minor defect such as a dent or weld. The sealing device is particularly useful for sealing an end corrugation of tubing in a fitting used in gas and liquid piping systems.
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Duquette Scott
Kellar Franz
Edwards Angell Palmer & & Dodge LLP
Hewitt James M
Hsi Jeffrey D.
Jensen Steven M.
Titeflex Corporation
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