Pipe joints or couplings – With indicator – alarm or inspection means
Patent
1976-06-09
1977-09-27
Arola, Dave W.
Pipe joints or couplings
With indicator, alarm or inspection means
285231, 285345, 285355, 285423, F16L 3500
Patent
active
040507211
ABSTRACT:
A length of pipe conduit is provided for forming a joint arrangement on each end with adjacent lengths of like pipe or conduit. The length of pipe is formed of plastic with a structurally rigid wall having a middle portion presenting exterior circumferential reinforcing flanges at spaced intervals along the length of the pipe and longitudinal reinforcing ribs at spaced intervals about the exterior of the pipe. One end of the length of pipe has a round tubular wall presenting a sealing gasket and male section with thread rib segments. The other end of the length of pipe has a female section with thread groove segments for receiving and threadingly engaging the male section of a similar length of pipe. The thread rib and thread groove cross-section profiles are triangular. The radial distance from the center line of the pipe to the outer periphery of the exterior surface of the largest diameter region of the female section is equal to the radial distance from the center line of the pipe to the outer edges of the longitudinal reinforcing ribs and circumferential reinforcing flanges in the middle portion of the pipe to thereby provide aligned longitudinal support points for the length of pipe, including the joint region. Further, the longitudinal reinforcing ribs on the length of pipe are disposed relative to the threaded ends so that when two lengths of pipe are fully threadingly engaged, the longitudinal reinforcing ribs on each length are in alignment providing visual indication that full threading engagement has been achieved.
REFERENCES:
patent: 836173 (1906-11-01), Burnstead
patent: 2508306 (1950-05-01), Thurston et al.
patent: 3204992 (1965-09-01), Walker
patent: 3791679 (1974-02-01), Glover
patent: 3794364 (1974-02-01), Williams
patent: 3813115 (1974-05-01), French
Arola Dave W.
Phone-Ducs, Inc.
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