Method for making nonmetallic pressure vessel with integral prop

Details Method for making nonmetallic pressure vessel with integral prop Method for making nonmetallic pressure vessel with integral prop

1993-09-17

1995-06-27

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft structure

Fuel supply

244158R, 220563, B64D 3708

Patent

active

054273340

ABSTRACT:
A method for making a storage tank with an integral vane starts with a feed pipe. A thin, flat vane has a shape which defines an inner and outer curve extending between attachment and second ends. The outer curve of the vane is dimensioned to lie just within the inner periphery of the tank, spaced therefrom by a particular gap. The attachment end of the vane is affixed to a first part of a coupling region of the feed pipe, with the pipe axis lying in the plane of the vane. The vane-pipe combination is placed in the cavity of a mold having the desired interior shape of the tank, with the edge of the outer curve of the vane spaces away from the wall of the mold by the desired gap. A dissolvable, hardenable liquid is injected into the mold and hardened. The mold is removed, leaving a soluble mandrel in the shape of the cavity of the tank. A copper coating is applied to the mandrel and the pipe, to form a metal liner including a neck extending over the feed pipe. A composite reinforcing shell is applied over the liner, after which solvent is passed through the feed pipe to dissolve the mandrel, leaving a reinforced, metal-lined cavity including the vane. In one embodiment of the invention, the vane is supported at the second end by attachment to the liner

REFERENCES:
patent: 3286878 (1966-11-01), Schadt et al.
patent: 3744738 (1973-07-01), Howard
patent: 4898030 (1990-02-01), Yeh
patent: 4957157 (1990-09-01), Dowdy et al.
patent: 4994749 (1991-02-01), Davies et al.
patent: 5279323 (1994-01-01), Grove et al.

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