Pipes and tubular conduits – Flexible – Spirally wound material
Patent
1992-02-13
1993-03-16
Bryant, III, James E.
Pipes and tubular conduits
Flexible
Spirally wound material
138121, 138122, 138154, 138173, 138174, F16L 916, F16L 906
Patent
active
051935880
ABSTRACT:
A pressure-resistant helical corrugated pipe comprises a helical corrugated pipe wall having a top portion, opposite side wall portions and a bottom portion; a continuous thin metal belt plate of a generally U-shaped transverse cross-section which is disposed in one of the top portion and the bottom portion and also in at least part of the opposite side wall portions extending from the one of the top portion and the bottom portion; another metal belt plate of a flat configuration being disposed in the other of the top portion and the bottom portion and disposed out of contact with the thin metal belt plate; and connective belt regions provided between the two metal belt plates in which the metal belt plates are absent, the connective belt regions being made of a synthetic resin or rubber to interconnect the two metal belt plates.
REFERENCES:
patent: 3198873 (1965-08-01), Ryan et al.
patent: 4140154 (1979-12-01), Kanao
patent: 4838317 (1989-06-01), Andre et al.
patent: 4862924 (1989-09-01), Kanao
patent: 4976289 (1990-12-01), Umemori et al.
patent: 4998563 (1991-03-01), Nagoyoshi et al.
patent: 5007462 (1991-04-01), Kanao
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