Double wall ducting

Details Double wall ducting Double wall ducting

1974-10-29

1976-06-01

Blix, Trygve M.

Aeronautics and astronautics

Miscellaneous

138143, 138173, 244 42CC, B64D 4700

Patent

active

039603431

ABSTRACT:
A lightweight, high-strength duct comprised of two thin annular tubes, one fitted within the other, the outer tube having spaced annular stiffening beads extending radially outwardly therefrom, and one of the tubes being vented to prevent pressure differentials between the inner surface of the outer tube and the outer surface of the inner tube at various altitudes and temperatures.

REFERENCES:
patent: 1153724 (1915-09-01), Stocker
patent: 1623112 (1927-04-01), Hall
patent: 1624485 (1927-04-01), Ferris
patent: 2104884 (1938-01-01), Quarnstrom
patent: 2209402 (1940-07-01), Kepler
patent: 2274519 (1942-02-01), Barrett
patent: 2707493 (1955-05-01), Bonvillian et al.
patent: 2794319 (1957-06-01), Stockdale
patent: 2878837 (1959-03-01), Burtt
patent: 3090584 (1963-05-01), Kuchemann et al.

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