Cap for forming sealed cavity around fastener

Capuchon pour former une cavité hermétiquement scellée autour d'une fermeture

Abstract

L'invention porte sur un joint qui comprend : une structure (1); et une fermeture traversant la structure. Le capuchon comprend une partie corps (16) ayant une base annulaire se terminant en un bord, la partie corps formant une enceinte autour d'une extrémité de la fermeture. Le capuchon comprend également un rebord annulaire (20) qui s'étend vers l'extérieur à partir de la partie corps et qui est en retrait par rapport au bord de la base de façon à définir une poche entre le rebord et la base. Un agent d'étanchéité est disposé dans la poche (24) entre le rebord (20) et la base, l'agent d'étanchéité liant le capuchon à la structure par l'intermédiaire d'une interface agent d'étanchéité/capuchon avec le capuchon et d'une interface agent d'étanchéité/structure avec la structure. La surface de l'interface agent d'étanchéité/capuchon est supérieure à la surface de l'interface agent d'étanchéité/structure.
A joint comprising: a structure (1); and a fastener passing through the structure. The cap has a body portion (16) with an annular base terminating at an edge, the body portion forming an enclosure around an end of the fastener. The cap also has an annular flange (20) which extends outwardly from the body portion and is set back from the edge of the base so as to define a pocket between the flange and the base. A sealant is provided in the pocket (24) between the flange (20) and the base, the sealant bonding the cap to the structure via a sealant/cap interface with the cap and a sealant/structure interface with the structure. The surface area of the sealant/cap interface is greater than the surface area of the sealant/structure interface.

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