초록 ▼

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 t

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.

대표청구항 ▼

A seal assembly for forming a fluid-tight seal between a duct and a wall where the duct passes through an opening in the wall sufficiently large to permit the duct to move laterally within the opening, comprising: an annular housing affixed to said wall about said opening in said wall so as to form

A seal assembly for forming a fluid-tight seal between a duct and a wall where the duct passes through an opening in the wall sufficiently large to permit the duct to move laterally within the opening, comprising: an annular housing affixed to said wall about said opening in said wall so as to form a passage through which said duct passes, said passage being sufficiently large to allow said duct to undergo lateral movement within said passage relative to said wall, said housing including means forming a circumferential internal recess that opens radially inwardly toward said duct and which includes mutually opposing, substantially parallel interior sidewalls extending generally parallel to the plane of said wall; and a substantially circular carrier ring engaged in said recess of said housing, said carrier ring having a first circumferential O-ring groove opening radially inwardly and supporting a first elastomeric O-ring snugly received in said first groove, said carrier ring and said first O-ring being sized such that said first O-ring snugly encloses in sealing relationship an exterior surface of a duct passing through said opening in said wall, said carrier ring further including at least one circumferential O-ring groove opening radially with respect to the axis of said carrier ring and supporting an elastomeric O-ring sized to snugly abut an interior facing sidewall of said recess to provide a seal between said carrier ring and said housing, said recess of said housing being sized larger in diameter than the diameter of said carrier ring so as to provide radial clearance for relative lateral motion of said duct and said carrier ring with respect to said housing.