Pipes and tubular conduits – With closures and plugs
Reexamination Certificate
2006-09-26
2006-09-26
Brinson, Patrick (Department: 3754)
Pipes and tubular conduits
With closures and plugs
C138S090000, C029S890031
Reexamination Certificate
active
07111645
ABSTRACT:
A plug for sealing high pressure tubes is made from a memory-shape alloy. The plug is formed having a diameter greater than the inner diameter of the tube and is shaped by cooling to its martensite finish temperature and bending its wings in opposing directions such that at a later time, it will fit within the tube. After insertion into the tube, the plug is heated to its austenite finish temperature, restoring its wings to almost their original shape, thereby exerting force onto the tube walls, sealing the tube from leakage.
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Brinson Patrick
Larson & Larson, PA
Liebenow Frank W.
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