Variable geometry duct seal

Details Variable geometry duct seal Variable geometry duct seal

1991-05-23

1993-07-13

Bryant, III, James E.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

138 26, 138 40, 138 46, 137 151, 244 53B, F15D 102, B64D 3302

Patent

active

052264556

ABSTRACT:
A variable-geometry duct having at least one moveable side wall, and a bellows interposed between the side wall and a back-up structure. The bellows creates a sealed cavity between the moveable side wall of the duct and the back-up structure. Pressurized fluid in the cavity is controlled so as to maintain a desired pressure differential between it and the pressure of the fluid carried by the conduit for all positions of the moveable side wall.

REFERENCES:
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patent: 2411315 (1946-11-01), Ashton
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patent: 2688984 (1954-09-01), Snyder
patent: 2953151 (1960-09-01), Snyder
patent: 3450142 (1969-06-01), Barry
patent: 3853147 (1974-12-01), Cibulka
patent: 3862646 (1975-01-01), Tarsha
patent: 3874417 (1975-04-01), Clay
patent: 4966200 (1990-10-01), Bents

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