Structure formed from a straight strip bent or corrugated and th

Details Structure formed from a straight strip bent or corrugated and th Structure formed from a straight strip bent or corrugated and th

1986-12-30

1989-08-22

Cuchlinski, Jr., William A.

Pipes and tubular conduits

Distinct layers

Bonded to each other

138 32, 138129, F16L 914

Patent

active

048586536

ABSTRACT:
A tubular structure is provided including an internal tube and an external tube which is formed from at least a straight strip bent or undulated, whose width is disposed substantially along at least a line normal to said tubes which it separates. It may be used, for example filled with an insulating lagging, by surrounding a pipe line or being adapted to the pipe line which then forms the internal tube.

REFERENCES:
patent: 230033 (1880-07-01), Merriam
patent: 289744 (1883-12-01), Aldrich
patent: 3102776 (1963-09-01), Steinmann et al.
patent: 4063344 (1977-12-01), Jones et al.
patent: 4611636 (1986-09-01), Kanao

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