Pipe joints or couplings – Particular interface – Tapered
Patent
1993-11-09
1994-11-08
Nicholson, Eric K.
Pipe joints or couplings
Particular interface
Tapered
285 92, 285423, 285355, 285289, 285138, 285149, 269152, 269173, 1563042, 156258, 138109, 138155, F16L 1504, F16L 1310
Patent
active
053621140
ABSTRACT:
A pipe joint for first and second profile wall pipes of the type having generally concentric, spaced apart inner and outer walls, and a helical rib connecting the inner wall to the outer wall. The convolutions of the helical rib extend in multiple turns around the exterior of the inner wall and along the interior of the outer wall for substantially the entire length of the pipe. The pipe joint includes a first exposed portion of the rib of the first pipe, and a second exposed portion of the rib of the second pipe. The exposed helical rib of the first pipe is threadably interengaged with the exposed helical rib of the second pipe.
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