Measuring and testing – With fluid pressure – Pipe
Reexamination Certificate
2006-02-14
2006-02-14
Williams, Hezron (Department: 2856)
Measuring and testing
With fluid pressure
Pipe
C073S049800
Reexamination Certificate
active
06997044
ABSTRACT:
A system is provided for testing a flexible tube. First and second hollow mandrels are inserted into opposing ends of the tube. Each mandrel has a conically tapered portion at one end thereof and a cylindrical portion extending from the conically tapered portion. The cylindrical portion has a plurality of annular indentations formed thereabout. Each of a plurality of clamps encircle the tube in line with one annular indentation to sealably engage the tube. A fluid delivery system is coupled between the cylindrical portions of the mandrels to deliver a flow of fluid through the tube via the mandrels. A measured strain producing load, continuous or cyclical, is applied by an apparatus which controllably moves the first mandrel relative to the second mandrel such that a cross-sectional shape of the tube between the mandrels is altered.
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Kasischke James M.
Nasser Jean-Paul A.
Stanley Michael P.
The United States of America as represented by the Secretary of
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