Method of everting a tube
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United States of America Patent
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Dec 1, 1992
Issued Date -
N/A
app pub date -
Feb 25, 1992
filing date -
Oct 5, 1990
priority date (Note) -
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Abstract
In a tube eversion apparatus a first chamber in which the eversion pressure is developed is controllably sealed by a sphincter-type valve, the valve being in turn actuated by pressure developed in a preferably separately controllable and adjustable second chamber, another chamber preferably being provided above the sphincter-type valve for containing a supply of liquid and limiting turbulence from any escape of fluid past the sphincter-type valve, the other chamber also providing apparatus for supplying heated fluid to a lay-flat hose adapted to be pulled through the sphincter-type valve by the tube being exerted. Use of the improved apparatus involves appropriate modifications of the usual eversion process involving applying and controlling the everting pressure and the pressure exerted against the sphincter-type valve by the fluid in the second chamber.
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