Pressure-resistant helical corrugated pipe

Details Pressure-resistant helical corrugated pipe Pressure-resistant helical corrugated pipe

1993-12-22

1995-01-31

Footland, Lenard A.

Pipes and tubular conduits

Flexible

Corrugated

F16L 11112

Patent

active

053851749

ABSTRACT:
A pressure-resistant helical corrugated pipe comprises a helical corrugated pipe wall formed by a top portion, opposite side wall portions and a bottom portion; a wide metal belt plate of a thin metal plate disposed at least at the top portion and the opposite side wall portions; and a small width metal belt plate being separate from the wide metal belt plate and disposed at the top portion of the pipe wall in overlapping relation to the wide metal belt plate in the direction of the thickness of the pipe wall. The two metal belt plates are integrally connected together at an overlap portion by a synthetic resin material or a rubber material.

REFERENCES:
patent: 494972 (1893-04-01), Wiegand
patent: 1819175 (1931-08-01), James
patent: 2475591 (1949-07-01), Chernack
patent: 4196755 (1980-04-01), Kutnyak et al.
patent: 4487232 (1984-12-01), Kanao
patent: 4754781 (1988-07-01), Jande putter
patent: 4860797 (1989-08-01), Richards et al.
patent: 4862924 (1989-09-01), Kanao
patent: 4998563 (1991-03-01), Nagayoshi et al.
patent: 5284185 (1994-02-01), Kanao

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