Coupling sleeve for connection of a branch pipe to a main pipe
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United States of America Patent
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-
Sep 29, 1992
Grant Date -
N/A
app pub date -
Dec 21, 1989
filing date -
Jun 23, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The connecting end on a coupling sleeve has an annular flange which may be hoved to urge compression stress to an annular deformable sealing ring to establish a seal between the main pipe and coupling sleeve. A stop part flange is positioned to one side of a sealing couple and which may assume a fixed position relative to the wall of the main pipe against which the stop part rests. Pivoted link stretching elements on the coupling sleeve move the insertion end of the branch pipe outwards relative to the wall of the main pipe and provides structure for exerting a compression stress against the resilient sealing ring to effect a seal between the coupling and main pipe. After securing the coupling sleeve in a sealing couple the connecting end and the insertion end assume a fixed predetermined position relative to the main pipe with use of stretching means which comprises at least two identical lever elements which are positioned at equal spacings about the periphery of the coupling sleeve and which are each capable of setting a predetermined fixed distance between fixed points connected to the outside periphery of the insertion end and the stop part.
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