Cap with injected sealant

摘要

A cap for forming a sealed cavity around an end of a fastener protruding from a structure has a cap body with an annular base 210 terminating at a rim 211 which surrounds an opening into a central cavity 130. An annular skirt 220 provides an annular pocket 240 between the skirt 220 and the base 210. An inlet hole 251 in the skirt 220 is in fluid communication with the pocket 240 and arranged to interconnect with a sealing material injection device 260 to provide a flow of sealing material through the skirt 220 via the inlet hole 251 into the pocket 240. An outlet 270 is also provided in the skirt 220. The outlet 270 is in fluid communication with the pocket 240 and arranged to enable air to escape the pocket 240 through the skirt 220 via the outlet 270 as the sealing material flows from the inlet hole 251 into the pocket 240.