Pipe joints or couplings – Socket – With separable fastener
Reexamination Certificate
2005-07-19
2005-07-19
Dunwoody, Aaron (Department: 3679)
Pipe joints or couplings
Socket
With separable fastener
C285S309000, C285S123900
Reexamination Certificate
active
06918618
ABSTRACT:
The present invention relates to a PVC-pipe, axially-tensioned joint. The pipe joint comprises a first PVC pipe having a spigot end, wherein the spigot end has a circumferential groove in and circumferentially around the outer surface of the spigot end. An inner ring is fitted into the groove in the spigot end and has a radial edge which forms a substantially radial shoulder circumferentially around the inner ring. The pipe joint also comprises a second PVC pipe having a bell end, wherein a plurality of angularly-spaced-apart holes extend radially through the bell end. The bell end of the second PVC pipe is fitted onto the spigot end of the first PVC pipe. There is a set of radial fasteners, wherein each given one of the radial fasteners extends through one of the plurality of angularly-spaced-apart holes in the bell end such that a first end portion of the fastener abuts against a shoulder of the inner ring.
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Dunwoody Aaron
Ipex Inc.
Riches McKenzie & Herbert LLP
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