High pressuure coupling for plastic pipe and conduit

Details High pressuure coupling for plastic pipe and conduit High pressuure coupling for plastic pipe and conduit

1994-05-16

1995-05-16

Arola, Dave W.

Pipe joints or couplings

With fluid pressure seal

Flexible lip

285319, 285423, 285903, 285910, 285921, 285369, F16L 1703

Patent

active

054154367

ABSTRACT:
A length of corrugated tubing is (B) inserted into a bell (C) having an open end 42. The corrugated tubing is defined by alternating annular portions peak (22) and valley portions (24) and a cylindrical inner wall (26) connected with an inner surface of the valley portions. Annular chambers (28) are defined between the cylindrical inner liner and each peak portion. The bell has a stop (10) and a cylindrical side wall (40) with a groove (44) for receiving a gasket (30) that is disposed in one of the tubing valleys. The groove is constructed an integer number of peak and valley portions from the stop such that the gasket aligns with the groove when an end of the tubing length abuts the stop. A plurality of latch elements (60) are disposed an integer number of peak and valley portions from the gasket receiving groove toward the bell open end. The latch elements extend into another of the valley portions and engage a corrugation side wall to transfer axial uncoupling forced from the tubing to the bell side wall. Each latch element is hingedly connected (70) with the bell cylindrical side wall. The latch elements each include a cam surface (64) which engage peak portions of the received tubing length and are cammed radially outward such that the latch elements pivot radially outward to facilitate receipt of the first length of corrugated tubing.

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