Duct seal assembly

Details Duct seal assembly Duct seal assembly

1980-12-23

1982-05-25

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 60, 277174, 277177, 277184, F16J 1512, F16J 1532

Patent

active

043313388

ABSTRACT:
A flexible, fluid-tight seal assembly for sealing the gap between a duct and a wall where the duct passes through an opening in the wall. The seal assembly includes an annular housing affixed to and centered on the opening in the wall. The housing includes a circular recess opening inwardly toward the duct. Contained in the recess is a carrier ring supporting a set of three O-rings set into cooperable O-ring grooves in the carrier ring. One O-ring groove opens inwardly toward the duct such that the associated O-ring snugly encircles the duct so as to provide a seal between the duct and the carrier ring. The other two O-rings are set into grooves which face in opposite directions such that the two O-rings snugly abut the walls of the recess to provide a seal between the carrier ring and the housing. The carrier ring is movable laterally in the recess of the housing so as to permit lateral movement of the duct with respect to the wall. Also, the O-ring sealed between the carrier ring and the duct permits the duct to undergo axial motion with respect to the carrier ring and the wall. Together, the three O-rings also permit the duct to undergo limited rotational motion about axes of rotation lying in the plane of the wall opening and extending transversely with respect to the duct. The seal assembly provides an effective gas- and liquid-tight seal between the duct and the wall and may be particularly adapted to accommodate a hot air duct in an airplane.

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