Pipe coupling
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United States of America Patent
Stats
-
Mar 27, 1984
Grant Date -
N/A
app pub date -
Jul 7, 1981
filing date -
Jul 11, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A quickly-attachable pipe coupling comprises a flexible tube having an internal diameter approximately equal to the outer diameter of the pipe to be coupled, and a cylindrical spring overlying the flexible tube. The cylindrical spring includes a closely-wound coil of flat spring material having more than one turn, and having an inner diameter in its relaxed condition less than the outer diameter of the flexible tube. The coil spring is partially uncoilable under stress to open by increasing its inner diameter at least to the outer diameter of the flexible tube. Thus, the flexible tube and the cylindrical spring thereover, when in its stressed open condition, may be applied over the end of the pipe to be coupled, whereupon the cylindrical spring may be relaxed to close and to cause it to compress the flexible tube into tight engagement with the pipe for the complete length of the coil spring.
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