Spiral ribbed pipe

Details Spiral ribbed pipe Spiral ribbed pipe

1984-10-15

1986-12-23

Bryant, III, James E.

Pipes and tubular conduits

Spirally seamed

138129, 138135, 138136, 138140, F16L 1116

Patent

active

046306501

ABSTRACT:
A spiral ribbed pipe formed from an elongate strip coiled helically. The pipe has a helical seam and an integral reinforcing rib formed along and around the seam, thereby increasing strength and rigidity of the pipe and its seam. The helical seam comprises a pair of interlocking edges located radially inward of the rib and intermediate a pair of offsets, whereby the inner surface of each coil of strip is longitudinally aligned with the surfaces of adjacent coils to provide a smooth interior pipe surface.

REFERENCES:
patent: 901534 (1908-10-01), Hamlin
patent: 1340818 (1920-05-01), Brinkman
patent: 1453220 (1923-04-01), Witzenmann
patent: 1570886 (1926-01-01), Fulton et al.
patent: 1677523 (1928-07-01), Herbst et al.
patent: 1885587 (1932-11-01), Burton
patent: 2118060 (1938-05-01), Stone et al.
patent: 3621884 (1971-11-01), Trihey
patent: 4326561 (1982-04-01), Kutnyak
patent: 4509560 (1985-04-01), Schafer

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